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Fig. 4 | Journal of Palaeogeography

Fig. 4

From: First record of ostracods from the Upper Ordovician red-coloured marine sandstones of the Tierekeawati Formation in Tarim Basin, NW China: implications on palaeoenvironment and palaeobiogeography

Fig. 4

Scanning electron micrographs of ostracods (I) from the Arisu red beds of the Tierekeawati Formation in Kalpin area, northwestern Tarim Basin, Northwest China. Scale bar is 100 μm. a Aparchites sp. Right lateral view of complete carapace, 171074, Late Ordovician; b Paraeuprimitia cf. pulchra Sun, 1978 (Guan et al. 1978). Left lateral view of complete carapace, 171075, Late Ordovician; c Euprimitia cf. symmetrica (Hou 1956). Right lateral view of complete carapace, 171076, Late Ordovician; d Primitia monstrata Shi and Wang 1985. Right lateral view of complete carapace, 171077, Late Ordovician; e Primitia monstrata Shi and Wang 1985. Left lateral view of complete carapace, 171078, Late Ordovician; f Primitia cf. monstrata Shi and Wang 1985. Right lateral view of complete carapace, 171079, Late Ordovician; g Primitia cf. wangjiawanensis Sun, 1983 (Wang et al. 1983). Right lateral view of complete carapace, 171080, Late Ordovician; h Primitia cf. wangjiawanensis Sun, 1983 (Wang et al. 1983). Right lateral view of complete carapace, 171081, Late Ordovician; iPrimitia sp. Right lateral view of complete carapace, 171082, Late Ordovician; j Predarwinula arguta Sun 1987. Right lateral view of complete carapace, 171083, Late Ordovician; k Predarwinula cf. arguta Sun 1987. Right lateral view of complete carapace, 171084, Late Ordovician; l Krausella sp. Left lateral view of complete carapace, 171085, Late Ordovician; m Krausella cf. calvini (Kay 1940). Right lateral view of complete carapace, 171086, Late Ordovician; n Nikitinella cf. pinnaformis Wang 2015. Right lateral view of complete carapace, 171087, Late Ordovician; o Longiscula cf. vulgaris Sun 1987. Right lateral view of complete carapace, 171088, Late Ordovician; pLongiscula cf. vulgaris Sun 1987. Dorsal view of complete carapace, 171089, Late Ordovician; q Longiscula subcylindrica (Ulrich 1889). Right lateral view of complete ca rapace, 171090, Late Ordovician; r Longiscula subcylindrica (Ulrich 1889). Left lateral view of complete carapace, 171091, Late Ordovician; sFenxiangia rhombiformis Jiang, 1995 (Jiang et al. 1995). Right lateral view of complete carapace, 171092, Late Ordovician; t Fenxiangia rhombiformis Jiang, 1995 (Jiang et al. 1995). Right lateral view of complete carapace, 171093, Late Ordovician

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