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The first report of terrestrial Petroxestes from the Lower Cretaceous Yixian Formation, western Liaoning, China
© The Author(s) 2018
- Received: 6 July 2017
- Accepted: 13 October 2017
- Published: 13 September 2018
Abundant aggregated, elongate, shallow borings have been discovered from the Lower Cretaceous Yixian Formation in western Liaoning, China. By contrast with several similarly-shaped trace fossils, such as Asthenopodichnium, Teredolites, Rogerella, Cubiculum and Petroxestes, their appearance, size, arranged modes, distribution density and substrate types are most similar with traces of Petroxestes that was discovered from Southern Ohio, USA (J. Paleontol. 62: 306–08, 1988). This is the first report of Petroxestes from China, and also the first report of these traces from a terrestrial environment.
- Trace fossils
- Jehol biota
- Carbonate rocks
- Terrestrial Petroxestes
A large number of well-preserved Jehol Biota fossils have been discovered in the Lower Cretaceous deposits in western Liaoning, China, consisting of macroplants, palynomorphs, charophytes, protistans, conchostracans, ostracods, shrimps, insects, bivalves, gastropods, fish, turtles, lizards, pterosaurs, crocodiles, dinosaurs, birds, and mammals (Sha 2007; Pan et al. 2012; Pan et al. 2013; Ding et al. 2016). However, reported trace fossils are relatively scarce (Xing et al. 2009). Nevertheless, trace fossils are irreplaceable evidences for some palaeontological behavior studying, for example, burrowing. Nowadays, ichnology not only has important applications in classical palaeobiology, but also is of great value in the more applied disciplines of palaeoenvironmental and stratigraphical analysis (McIlroy 2004).
Petroxestes pera is an ichnospecies erected by Wilson and Palmer (1988) from the Ordovician of Ohio (USA), and interpreted to have been produced by boring bivalves. It is a bioerosional ichnotaxon, occurring within lithic substrates, and is characterized by a shallow to deep elongate outline, broadly parallel sides, and a rounded bottom in longitudinal and transverse section (Pickerill et al. 2001). It is densely distributed on the surface of carbonate rocks from the Lower Cretaceous Yixian Formation in western Liaoning, China. This paper aims to give a detailed description of the morphology of these trace fossils and point out their differences with other similarly-shaped traces.
Petroxestes fossils have been found from two sites (Fig. 1). One (GPS coordinates 41°36′15.7″N/120°51′44.8″E) is located 4.8 km northeast of Sihetun village (Fig. 1), and trace fossils were discovered in the lowermost portion of the Yixian Formation. The other (GPS coordinates 41°32′37.8″N/120°7′41.8″E) is located 9 km west of Yixian county, and trace fossils were preserved in the middle portion of the Yixian Formation. The former one belongs to the Jin–Yang Basin, and the latter one belongs to Yixian Basin. All Petroxestes were discovered in situ, on the surface of carbonate rocks from the Yixian Formation.
There is a slight difference in the size of Petroxestes between the two areas. Petroxestes from the Jin–Yang Basin is 9–21 mm long and 1–3 mm wide. The proportion of 12–14-mm-long traces is more than 50%, and 10–18-mm-long ones are exceeding 90%. More than 56% of traces are 2 mm wide. In the Yixian Basin, the length and width of Petroxestes are 11–20 mm and 2–4 mm, respectively. The proportion of 14–15-mm-long traces is more than 50%, and 11–15 mm long ones more than 80%. About 42% of traces are 2 mm wide. However, in the two areas, the depth of traces is similar, both varying from 1.5 mm to 3 mm. Generally, the width/length ratio of these Petroxestes is less than 0.2.
The main bases for the identification of these traces as borings rather than burrows are as follows. Firstly, borings are produced by physical and/or chemical erosion (usually acidic substances formed by organisms), so they usually have relatively-smooth inside surfaces (McIlroy 2004). Traces from the Yixian Formation have such surfaces (Fig. 2b–e; Fig. 3b, c). Secondly, these traces are straight in outline (Fig. 2a, b, d–e; Fig. 3b), which means they have no obvious extrusion deformation occurred during the process of diagenesis. If these traces were burrows that formed in soft sediments, it is very difficult to achieve (Miller 2007). Thirdly, these traces were preserved on surface of carbonate rocks. In a continental environment, these strata generally indicate discontinuity of sedimentation by recurrent exposure to the air and were hard when they were formed (Barrell 1917). Lastly, the following lithostratigraphic characteristics of these traces-bearing carbonate rock strata also support the identification of borings. In the Jin–Yang Basin, carbonate stratum that bear traces is distributed in a limited area (the northeast–southwest span is about 200 m). The interface between the carbonate stratum and the overlying yellowish–green siltstone is clear and there are no sand grains squeezed into the carbonate rocks (Fig. 2c). It can be inferred that before the siltstone was deposited the carbonate sediments had been consolidated. In the Yixian Basin, carbonate stratum that contains traces is distributed in a smaller area (the northwest–southeast span is no more than 20 m). The carbonate rock, as well as other mudstone and shale, are all covered by a clastic marlstone that contains debris of sandstone, bivalve shells, three-dimensionally preserved caddisfly larval cases and so on (Gong et al. 2017). It can be speculated that the overlying clastic marlstone should be the product of gravity flows and the traces were formed after the diagenetic progress of the carbonate stratum.
4.1 Differences with other similarly-shaped trace fossils
Petroxestes shows a round bottom in both longitudinal and transverse sections, which is obviously different from other trace fossils. Ignoring this feature, trace fossils with similar morphology include Asthenopodichnium, Teredolites, Rogerella, and Cubiculum.
Francischini et al. (2016) reported a new species of Asthenopodichnium, A. fallax, that occurs on clasts of calcrete from the Upper Cretaceous Marília Formation of Brazil. Apart from the smooth and nearly-straight outline in longitudinal section, they are different from Petroxestes in having a higher width/length ratio (0.29).
Teredolites are characterized by their single aperture with a more-or-less circular cross-section, their hemispherical distal termination and thin calcite linings (Plint and Pickerill 1985) (Table 1). They have been discovered from nonmarine (e.g., Arua 1991; Plint and Pickerill 1985), marginal or shallow marine (e.g., Chamberlain 1976; Crampton 1990; Dewey and Keady 1987; Dott Jr. and Bourgeois 1982; Francis 1986; Howard and Frey 1984; Kiteley and Field 1984; Lindqvist 1986), and quiet deep marine deposits (e.g., Andersen 1983; Frey 1972; Turner 1973; Wolff 1979). Two different ichnospecies usually occur, a shorter or clavate form, T. clavatus Leymerie 1842, and an elongate form T. longissimus Kelly and Bromley 1984 (Monaco et al. 2011).
The long axis of T. clavatus is usually perpendicular to the substrate (Kelly and Bromley 1984), which is different from Petroxestes from the Yixian Formation. Additionally, its nearly-circular cross-section and hemispherical distal termination make it more distinctive. T. longissimus is primarily parallel (e.g., Monaco et al. 2011; Plint and Pickerill 1985; Savrda et al. 1993) or perpendicular (e.g., Arua 1991; Pickerill et al. 2003) to the grain of the substrate. It differs from Petroxestes in size (length greater than 20 mm), shapes (tortuous, circular cross-section), arrangement mode (close and parallel with each other), and substrate types (generally in xylic substrates), though having a similar width/length ratio.
Rogerella (Saint-Seine 1951) presents holes with an elliptical contour and an elongate distal portion, as well as, sometimes, a slight curvature and a circular or conical proximal portion (Brezina et al. 2017) (Table 1). The traces can be found alone or in groups. When grouped, these holes are arranged randomly (e.g., Baird et al. 1990; Brezina et al. 2017) or parallel with each other (e.g., Seilacher 1968, 1969; Donovan and Jagt 2013; Donovan et al. 2016), and in a roughly equidistant, perpendicular or oblique to the substrate surface. They have been discovered on various types of substrates from Devonian to Holocene marine environments (Taylor and Wilson 2003), including carbonate hardgrounds (Brezina et al. 2017), echinoid skeletons (Saint-Seine 1951; Donovan and Jagt 2013; Donovan et al. 2016), belemnite rostra (Seilacher 1968, 1969), gastropods shells (Baird et al. 1990), and so on. Rogerella is most similar in shape to Petroxestes, but significantly smaller (length: 1.2–2.5 mm, and diameter: 0.2–0.42 mm).
Cubiculum are regarded as traces of necrophagous or osteophagous insects (Ibrahim et al. 2014). Three species of Cubiculum have been reported, i.e., C. ornatus (Roberts et al. 2007), C. inornatus (Xing et al. 2016) and C. levis (Pirrone et al. 2014). In appearance, C. levis are bowl-shaped, while C. ornatus and C. inornatus are club-shaped (Table 1). The main difference between C. ornatus and C. inornatus is that the medial wall of the former has shallow grooves ornamentation, whereas the latter does not. Additionally, C. inornatus were discovered singly, while C. ornatus were observed more commonly in dense numbers. Except for morphology, the main difference between Cubiculum and Petroxestes is that the former is only found from fossil biogenic bones.
According to the summation above, it can be seen that traces from the Yixian Formation, in morphology, size, arrange mode and substrate types, are distinguished from Asthenopodichnium, Teredolites, Rogerella, Cubiculum, and other trace fossils. They are more in line with the definition of Petroxestes.
4.2 Contrast of reported Petroxestes
A list of main features of reported Petroxestes
Ohio and Kentucky, USA
Liaoning Province, China
Anticosti Island, Canada
Carriacou, Lesser Antilles
Grand Bay Formation
Incomplete valve of Ostrea
Jagt et al. 2009
Pickerill et al. 2001
4.3 Producer analysis
Pojeta and Palmer (1976) were of the opinion that a facultative rock-boring modiomorphid bivalve, Corallidomus scobina, produced such traces, based on the presence of a specimen preserved in situ with the borings. Except for this documentation, there are no builder fossils in all the other reported Petroxestes borings. However, it is very clear that Corallidomus scobina are definitely not the builders of all the Petroxestes, because of the large span in geological time (from Late Ordovician to Middle Miocene) and palaeoenvironment types (from marine to terrestrial environments) of these trace fossils.
In ichnology, it is only under exceptional circumstances that the producer of an ichnotaxon can be identified with confidence, because unrelated groups are sometimes morphologically very similar and can therefore produce similar traces, or groups are morphologically very different but behave in a similar manner due to physical or biological parameters and again produce similar traces (Plint and Pickerill 1985; Seilacher 1960). Hence, only potential builders of Petroxestes from the Yixian Formation could be speculated.
There are only 13 species belonging to seven genera of bivalves in the Jehol Group (Jiang and Sha 2007). Only three species belonging to two genera were discovered in the Yixian Formation. They are Arguniella yanshanensis (Gu et al. 1976), A. lingyuanensis (Gu et al. 1976) and Sphaerium anderssoni (Grabau 1923). Sphaerium must have the ability to burrow, crawl and short-distance jump. Arguniella are able to crawl or swim, possibly to burrow, based on their physiological structure characteristics (Private communication with Prof. Sha. in 2017). The substrate was still plastic because some of the burrows were slightly compactionally deformed, which reduced the difficulty of burrowing. The length and height of their fossil records are as follows: A. yanshanensis, 15–21 mm and 10–15 mm; A. lingyuanensis, 8–17 mm and 4–12 mm; Sphaerium anderssoni, 8–12 mm and 5–9 mm (Jiang and Sha 2007). The two former species are more likely to be the builders for their suitable size for these traces. However, it does not rule out the possibilities of other organisms to produce these traces.
Petroxestes have been discovered from the Lower Cretaceous Yixian Formation of western Liaoning, China. This is the first report of Petroxestes from China; meanwhile it is the first report of Petroxestes from a terrestrial environment.
Petroxestes from China are very similar with the ones from the USA in appearance, size, arranged mode, distribution density and substrate types, but are different from Asthenopodichnium, Teredolites, Rogerella, Cubiculum and other trace fossils.
Petroxestes fossils cannot be produced by the same fabricator, because the large span in geological time and paleoenvironment types of these trace fossils. Petroxestes from the Yixian Formation may be built by some bivalves of Arguniella yanshanensis, A. lingyuanensis and Sphaerium anderssoni, or other organisms.
This study was supported by the National Natural Science Foundation of China (Grant No. 41172003 and 41572004). The authors thanks Prof. Jin-Geng Sha for his generous share of research works of the ability to dig holes in bivalves.
All authors read and approved the final manuscript.
The authors declare that they have no competing interests.
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- Andersen, Jordan L. 1983. Teredoes: The ubiquitous predator. Oceans 16: 19.Google Scholar
- Arua, I. 1991. The trace fossil Teredolites longissimus in calcareous concretions from the Eocene Ameki formation, southeastern Nigeria. Journal of African Earth Sciences (and the Middle East) 12 (4):605–608.View ArticleGoogle Scholar
- Baird, Gordon C., Carlton E. Brett, and Jack T. Tomlinson. 1990. Host-specific acrothoracid barnacles on middle Devonian platyceratid gastropods. Historical Biology 4 (3–4):221–244.View ArticleGoogle Scholar
- Barrell, Joseph. 1917. Rhythms and the measurements of geologic time. GSA Bulletin 28 (1):745–904.View ArticleGoogle Scholar
- Brezina, Soledad S., M. Virginia Romero, and Silvio Casadío. 2017. Encrusting and boring barnacles through the cretaceous/Paleogene boundary in northern Patagonia (Argentina). Ameghiniana 54 (1):107–123.View ArticleGoogle Scholar
- Chamberlain, C.K. 1976. Field guide to the trace fossils of the Cretaceous Dakota Hogback along Alameda Avenue, west of Denver, Colorado. In Seminar on Trace Fossils, ed. C.K. Chamberlain and R.W. Frey, 242–250. Golden, Colorado: Colorado School of Mines.Google Scholar
- Chang, Mee-Mann, Pei-Ji Chen, Yuan Wang, and Yuan-Qing Wang. 2003. The Jehol fossils: The emergence of featured dinosaurs, beaked birds and flowering plants. Shanghai: Shanghai Scientific and Technical Publishers.Google Scholar
- Chen, Deng-Hui, En-Pu Gong, Jun-Hong Liang, and Xiao-Hong Chen. 2011. The carbon and oxygen stable isotopic compositions and sedimentary environment of the lacustrine carbonate from the upper cretaceous Yixian formation, western Liaoning, NE China. Acta Geologica Sinica 85 (6):987–992 (in Chinese with English abstract).Google Scholar
- Chen, Deng-Hui, En-Pu Gong, Jun-Hong Liang, and Yong-Jie Li. 2009. The lacustrine carbonates and their sedimentary environment of lower cretaceous Yixian formation in western Liaoning. Geological Review 55 (6):897–904 (in Chinese with English abstract).Google Scholar
- Chen, Deng-Hui, En-Pu Gong, Jun-Hong Liang, Yong-Jie Li, and Xu-Ming Dong. 2010. Mechanism of the chert formation within the lacustrine carbonates of the lower cretaceous Yixian formation, western Liaoning. Acta Geologica Sinica 84 (8):1208–1214 (in Chinese with English abstract).Google Scholar
- Chen, Pei-Ji, Zhi-Ming Dong, and Shuo-Nan Zhen. 1998. An exceptionally well-preserved theropod dinosaur from the Yixian formation of China. Nature 391 (6663):147–152.View ArticleGoogle Scholar
- Crampton, J.S. 1990. A new species of late cretaceous wood-boring bivalve from New Zealand. Palaeontology 33 (4):981–992.Google Scholar
- Dewey, C.P., and D.M. Keady. 1987. An allochthonous preserved woodground in the upper cretaceous Eutaw formation in Mississippi. Southeastern Geology 27:165–170.Google Scholar
- Ding, Qiuhong, Ning Tian, Yongdong Wang, Zikun Jiang, Shuwang Chen, Dong Wang, Wu Zhang, Shaolin Zheng, Aowei Xie, Guoqiang Zhang, and Zhongjian Liu. 2016. Fossil coniferous wood from the early cretaceous Jehol biota in western Liaoning, NE China: New material and palaeoclimate implications. Cretaceous Research 61:57–70.View ArticleGoogle Scholar
- Ding, Qiu-Hong, Li-Dong Zhang, Sheng-Zhe Guo, Chang-Jie Zhang, Yan-Dong Peng, Bin Jia, Shu-Wang Chen, and De-He Xing. 2003. Study on the paleoecology of Yixian formation in Beipiao area, western Liaoning Province, China. Geology and Resources 12 (1):9–18 (in Chinese with English abstract).Google Scholar
- Donovan, Stephen K., and John W.M. Jagt. 2013. Rogerella isp. Infesting the pore pairs of Hemipneustes striatoradiatus (Leske) (Echinoidea: Upper cretaceous, Belgium). Ichnos 20 (4):153–156.View ArticleGoogle Scholar
- Donovan, Stephen K., John W.M. Jagt, and Eric Nieuwenhuis. 2016. Site selectivity of the boring Rogerella isp. Infesting Cardiaster granulosus (Goldfuss) (Echinoidea) in the type Maastrichtian (upper cretaceous, Belgium). Geological Journal 51 (5):789–793.View ArticleGoogle Scholar
- Dott, R.H., Jr., and Joanne Bourgeois. 1982. Hummocky stratification: Significance of its variable bedding sequences. GSA Bulletin 93 (8):663–680.View ArticleGoogle Scholar
- Francis, J.E. 1986. Growth rings in cretaceous and tertiary wood from Antarctica and their palaeoclimatic implications. Palaeontology 29:665–684.Google Scholar
- Francischini, Heitor, Voltaire D. Paes Neto, Agustín G. Martinelli, Vitor P. Pereira, Thiago S. Marinho, Vicente P.A. Teixeira, Mara L.F. Ferraz, Marina B. Soares, and Cesar L. Schultz. 2016. Invertebrate traces in pseudo-coprolites from the upper cretaceous Marília formation (Bauru group), Minas Gerais state, Brazil. Cretaceous Research 57:29–39.View ArticleGoogle Scholar
- Frey, R.W. 1972. Paleoecology and depositional environment of Fort Hays Limestone Member. Niobrara Chalk (Upper Cretaceous west-central Kansas: The University of Kansas Paleontological Contributions Article 58, Cretaceous 3.Google Scholar
- Genise, Jorge F., Romain Garrouste, Patricia Nel, Philippe Grandcolas, Pierre Maurizot, Dominique Cluzel, Rapha L. Cornette, Anne-Claire Fabre, and André Nel. 2012. Asthenopodichnium in fossil wood: Different trace makers as indicators of different terrestrial palaeoenvironments. Palaeogeography, Palaeoclimatology, Palaeoecology 365–366:184–191.View ArticleGoogle Scholar
- Gong, En-Pu, Deng-Hui Chen, Jun-Hong Liang, and Yong-Li Zhang. 2011. Carbonate interlayers of the Yixian formation in western Liaoning and their environmental significance. Acta Geologica Sinica 85 (4):459–466 (in Chinese with English abstract).Google Scholar
- Gong, En-Pu, Jun-Hong Liang, Xiao-Dong Li, Chun-Hong Wang, and Xian-De Cui. 2007. Comprehensive research on the sedimentary environment and palaeogeography of early cretaceous Jehol biota in western Liaoning, China. Acta Geologica Sinica 81 (1):1–8 (in Chinese with English abstract).Google Scholar
- Gong, En-Pu, Jiang Xu, Tie-Hui Wang, Yue Liang, and Fei Gao. 2017. Microbial-caddisfly bioherms in the early cretaceous Yixian formation in the Yixian Basin, western Liaoning, China. Cretaceous Research 78:127–138.View ArticleGoogle Scholar
- Grabau, A.W. 1923. Cretaceous Mollusca from North China. Bulletin of the Geological Survey of China 5 (2):183–198.Google Scholar
- Gu, Z.W., B.Y. Huang, C.Z. Chen, S.X. Wen, et al. 1976. Lamellibranchs of China. Beijing: Science Press (in Chinese).Google Scholar
- Guo, Sheng-Zhe, Li-Dong Zhang, Chang-Jie Zhang, Yan-Dong Peng, Bin Jia, Shu-Wang Chen, De-He Xing, Qiu-Hong Ding, and Yue-Juan Zheng. 2001. The progress on the studies of the Yixian formation in western Liaoning Province. Chinese Geology 28 (8): 1–8 (in Chinese with English abstract).Google Scholar
- Höpner, Sara, and Markus Bertling. 2017. Holes in bones: Ichnotaxonomy of bone borings. Ichnos 24 (4):259–282.View ArticleGoogle Scholar
- Hou, Lian-Hai, Zhong-He Zhou, Larry D. Martin, and Alan Feduccia. 1995. A beaked bird from the Jurassic of China. Nature 377 (6550): 616–618.View ArticleGoogle Scholar
- Howard, James D., and Robert W. Frey. 1984. Characteristic trace fossils in nearshore to offshore sequences, upper cretaceous of east-Central Utah. Canadian Journal of Earth Sciences 21 (2):200–219.View ArticleGoogle Scholar
- Hu, Y., Y. Wang, Z. Luo, and C. Li. 1997. A new symmetrodont mammal from China and its implications for mammalian evolution. Nature 390 (6656):137–142.View ArticleGoogle Scholar
- Huang, Di-Ying. 2015. Yanliao biota and Yanshan movement. Acta Palaeontologica Sinica 54 (4):501–546 (in Chinese with English abstract).Google Scholar
- Ibrahim, N., D.J. Varricchio, P.C. Sereno, J.A. Wilson, D.B. Dutheil, D.M. Martill, L. Baidder, and S. Zouhri. 2014. Dinosaur footprints and other ichnofauna from the cretaceous Kem Kem beds of Morocco. PLoS One 9 (6): e90751.View ArticleGoogle Scholar
- Jagt, John W.M., Christian Neumann, and Stephen K. Donovan. 2009. Petroxestes altera, a new bioerosional trace fossil from the upper Maastrichtian (cretaceous) of Northeast Belgium. Bulletin de l’Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre 79:137–145.Google Scholar
- Ji, Qiang. 2004. Mesozoic Jehol biota of western Liaoning, China. Beijing: Geological Publishing House (in Chinese).Google Scholar
- Ji, Qiang, Philip J. Currie, Mark A. Norell, and Shu-An Ji. 1998. Two feathered dinosaurs from northeastern China. Nature 393 (6687):753–761.View ArticleGoogle Scholar
- Ji, Qiang, and Shu-An Ji. 1996. Discovery of the earliest bird fossil in China and the origin of birds. Chinese Geology 233 (10):30–33 (in Chinese).Google Scholar
- Jiang, Bao-Yu, and Jin-Geng Sha. 2007. Preliminary analysis of the depositional environments of the lower cretaceous Yixian formation in the Sihetun area, western Liaoning, China. Cretaceous Research 28 (2):183–193.View ArticleGoogle Scholar
- Jiang, Bao-Yu, Jin-Geng Sha, and Hua-Wei Cai. 2007. Early cretaceous nonmarine bivalve assemblages from the Jehol group in western Liaoning, Northeast China. Cretaceous Research 28 (2):199–214.View ArticleGoogle Scholar
- Kelly, Simon R.A., and Richard G. Bromley. 1984. Ichnological nomenclature of clavate borings. Palaeontology 27 (4):793–807.Google Scholar
- Kiteley, Louise W., and Michael E. Field. 1984. Shallow marine depositional environments in the upper cretaceous of northern Colorado. In Siliciclastic Shelf Sediments, ed. R.W. Tillman and C.T. Siemers. SEPM Special Publications 34 179–204.Google Scholar
- Leymerie, A. 1842. Suite de mémoire sur le terrain Crétacé du département de l'Aube. Geological Society of France. Memoir 4:1–34.Google Scholar
- Lindqvist, Jon K. 1986. Teredinid-bored Araucariaceae logs preserved in shoreface sediments, Wangaloa formation (Paleocene), Otago, New Zealand. New Zealand Journal of Geology and Geophysics 29 (2):253–261.View ArticleGoogle Scholar
- McIlroy, Duncan. 2004. The application of ichnology to palaeoenvironmental and stratigraphic analysis:Introduction. Geological Society, London, Special Publications 228:1–2.View ArticleGoogle Scholar
- Miller, William. 2007. Trace fossils:Concepts, problems, prospects. Amsterdam: Elsevier.Google Scholar
- Monaco, Paolo, Federico Famiani, Roberto Bizzarri, and Angela Baldanza. 2011. First documentation of wood borings (Teredolites and insect larvae) in early Pleistocene lower shoreface storm deposits (Orvieto area central Italy). Bollettino Della Societa Paleontologica Italiana 50 (1):55–63.Google Scholar
- Pan, Yan-Hong, Jin-Geng Sha, and Xiao-Gang Yao. 2012. Taphonomy of early cretaceous freshwater bivalve concentrations from the Sihetun area, western Liaoning, NE China. Cretaceous Research 34:94–106.View ArticleGoogle Scholar
- Pan, Yan-Hong, Jin-Geng Sha, Zhong-He Zhou, and Franz T. Fürsich. 2013. The Jehol biota:Definition and distribution of exceptionally preserved relicts of a continental early cretaceous ecosystem. Cretaceous Research 44:30–38.View ArticleGoogle Scholar
- Pickerill, R.K., S.K. Donovan, and R.W. Portell. 2001. The bioerosional ichnofossil Petroxestes pera Wilson and Palmer from the middle Miocene of Carriacou. Caribbean Journal of Science 37 (1):130–131.Google Scholar
- Pickerill, R.K., S.K. Donovan, and R.W. Portell. 2003. Teredolites longissimus Kelly & Bromley from the Miocene Grand Bay formation of Carriacou, the Grenadines, Lesser Antilles. Scripta Geologica 125 (1):1–9.Google Scholar
- Pirrone, Cecilia A., Luis A. Buatois, and Bernardo González Riga. 2014. A new ichnospecies of Cubiculum from upper cretaceous dinosaur bones in western Argentina. Ichnos 21 (4):251–260.View ArticleGoogle Scholar
- Plint, A. Guy, and Ron K. Pickerill. 1985. Non-marine Teredolites from the middle Eocene of southern England. Lethaia 18 (4):341–347.View ArticleGoogle Scholar
- Pojeta, John, and T.J. Palmer. 1976. The origin of rock boring in mytilacean pelecypods. Alcheringa:An Australasian Journal of Palaeontology 1 (2):167–179.View ArticleGoogle Scholar
- Roberts, Eric M., Raymond R. Rogers, and Brady Z. Foreman. 2007. Continental insect borings in dinosaur bone:Examples from the late cretaceous of Madagascar and Utah. Journal of Paleontology 81 (1):201–208.View ArticleGoogle Scholar
- Saint-Seine, R. 1951. Un Cirripède acrothoracique du Crétacé:Rogerella lecointrei, n. g., n. sp., Académie des Sciences (Paris). comptes rendus 233:1015–1053 (in French).Google Scholar
- Savrda, Charles E., Kate Ozalas, Timothy H. Demko, Richard A. Huchison, and Thomas D. Scheiwe. 1993. Log-grounds and the ichnofossil Teredolites in transgressive deposits of the Clayton formation (lower Paleocene), western Alabama. Palaios 8 (4):311–324.View ArticleGoogle Scholar
- Seilacher, Adolf. 1960. Lebensspuren als Leitfossilien. Geologische Rundschau 49 (1):41–50 (in German).View ArticleGoogle Scholar
- Seilacher, Adolf. 1968. Swimming habits of belemnites — Recorded by boring barnacles. Palaeogeography, Palaeoclimatology, Palaeoecology 4 (4):279–285.View ArticleGoogle Scholar
- Seilacher, Adolf. 1969. Paleoecology of boring barnacles. American Zoologist 9 (3):705–719.View ArticleGoogle Scholar
- Sha, Jin-Geng. 2007. Cretaceous stratigraphy of Northeast China:Non-marine and marine correlation. Cretaceous Research 28 (2):146–170.View ArticleGoogle Scholar
- Sun, Ge, David L. Dilcher, Shao-Ling Zheng, and Zhe-Kun Zhou. 1998. In search of the first flower:A Jurassic angiosperm, Archaefructus, from Northeast China. Science 282 (5394):1692–1695.View ArticleGoogle Scholar
- Tapanila, L. 2001. “Bioerosion in Late Ordovician and Early Silurian Tropical Carbonate Settings of Anticosti Island, Québec, Canada. [Doctoral Thesis]” School of Graduate Studies, Laurentian university, Sudbury Canada, 19–21.Google Scholar
- Tapanila, L., and P. Copper. 2002. Endolithic trace fossils in Ordovician–Silurian corals and stromatoporoids, Anticosti Island, eastern Canada. Acta Geológica Hispánica 37 (1):15–20.Google Scholar
- Taylor, P.D., and M.A. Wilson. 2003. Palaeoecology and evolution of marine hard substrate communities. Earth-Science Reviews 62 (1–2):1–103.View ArticleGoogle Scholar
- Thenius, E. 1988. Lebensspuren von aquatischen Insektenlarven aus dem Jungtertiar Niederosterreichs. [trace fossils from nymphs of aquatic insects from the Neogene of Lower Austria]. Beiträge für Palaeontogie Oesterreich 14:1–18 (in German).Google Scholar
- Thenius, Erich, and Wilhelm Klaus. 1979. Lebensspuren von Ephemeropteren-Larven aus dem Jung-Tertiär des Wiener Beckens. Annalen Des Naturhistorischen Museums in Wien 82:177–188 (in German).Google Scholar
- Turner, R.D. 1973. Wood-boring bivalves, opportunistic species in the deep sea. Science 180 (4093):1377–1379.View ArticleGoogle Scholar
- Uchman, Alfred, Gaigalas Algirdas, M. Melešyte, and Vaidotas Kazakauskas. 2007. The trace fossil Asthenopodichnium lithuanicum isp. Nov. from late Neogene brown-coal deposits, Lithuania. Geological Quarterly 51 (3):329–336.Google Scholar
- Wang, Wu-Li, Hong Zhang, Li-Jun Zhang, Shao-Lin Zheng, Fang-Lin Yang, Zhi-Tong Li, Yue-Juan Zheng, and Qiu-Hong Ding. 2004. Standard stratigraphic sections of Tuchengzi stage and Yixian stage and their Stratigraphical Palaeontology and tectonic-volcanic activities, 92–110. Beijing:Geological Publishing House (in Chinese).Google Scholar
- Wang, Xiao-Lin, Yuan-Qing Wang, Yuan Wang, Xing Xu, Zhi-Lu Tang, Fu-Cheng Zhang, Yao-Ming Hu, Gu Gang, and Zhao-Lin Hao. 1998. Stratigraphic sequence and vertebrate-bearing beds of the lower part of the Yixian formation in Sihetun and neighbouring area, western Liaoning, China. Vertebrata Palasiatica 36 (2):81–101 (in Chinese with English summary).Google Scholar
- Wilson, Mark A., and Timothy J. Palmer. 1988. Nomenclature of a bivalve boring from the upper Ordovician of the midwestern United States. Journal of Paleontology 62 (2):306–308.View ArticleGoogle Scholar
- Wilson, Mark A., and Timothy J. Palmer. 2006. Patterns and processes in the Ordovician bioerosion revolution. Ichnos 13 (3):109–112.View ArticleGoogle Scholar
- Wolff, Torben. 1979. Macrofaunal utilization of plant remains in the deep sea. Sarsia 64 (1–2):117–143.View ArticleGoogle Scholar
- Xing, Li-Da, Jerald D. Harris, Xiang-Yang Feng, and Zhi-Jun Zhang. 2009. Theropod (Dinosauria:Saurischia) tracks from lower cretaceous Yixian formation at Sihetun Village, Liaoning Province, China and possible track makers. Geological Bulletin of China 28 (6):705–712.Google Scholar
- Xing, Li-Da, Alexander H. Parkinson, Hao Ran, Cecilia A. Pirrone, Eric M. Roberts, Jian-Ping Zhang, Michael E. Burns, Tao Wang, and Jonah Choiniere. 2016. The earliest fossil evidence of bone boring by terrestrial invertebrates, examples from China and South Africa. Historical Biology 28 (8):1108–1117.View ArticleGoogle Scholar
- Zhang, Xiao-Lin, Gui-Jie Zhang, and Jin-Geng Sha. 2016. Lacustrine sedimentary record of early Aptian carbon cycle perturbation in western Liaoning, China. Cretaceous Research 62:122–129.View ArticleGoogle Scholar
- Zhang, Ya-Nan, En-Pu Gong, and Jun-Hong Liang. 2006. The structural analysis and correlation of sedimentary sections of Yixian formation in western Liaoning Province. Geology and Resources 15 (1):20–24 (in Chinese with English abstract).Google Scholar
- Zhu, Guang, Zhao-Qi Hu, Yin Chen, Man-Lan Niu, and Cheng-Long Xie. 2008. Evolution of early cretaceous extensional basins in the eastern North China craton and its implication for the craton destruction. Geological Bulletin of China 27 (10):1594–1604 (in Chinese with English abstract).Google Scholar