Strobeus, de Koninck, 1881

Ketwetsuriya, Chatchalerm, Karapunar, Baran, Charoentitirat, Thasinee & Nützel, Al- Exander, 2020, Middle Permian (Roadian) gastropods from the Khao Khad Formation, Central Thailand: Implications for palaeogeography of the Indochina Terrane, Zootaxa 4766 (1), pp. 1-47 : 33

Strobeus ? sp. 2

( Fig. 22 D–E)

Material. Two specimens: ESKU-19- LP 217, 220.

Dimensions (mm): ESKU-19- LP 217: height = 1.4; width = 1.0; apical angle = 76 º. ESKU-19- LP 220: height = 1.3; width = 1.0; apical angle = 78 º.

Description. Shell fusiform, distinctly higher than wide with about three whorls (apex missing); periphery evenly rounded, convex; whorls embracing at or slightly above periphery; spire whorls slightly convex; whorls smooth; body-whorl inflated; suture shallow; base rounded, convex; anomphalous; aperture unknown.

Remarks. The two specimens resemble Strobeus dongluoensis ( Pan & Yu, 1993) from the Upper Permian Changxing Formation, China (see also Pan & Erwin 2002; Nützel & Nakazawa 2012). The identification of the present specimens remains doubtful due to insufficient preservation.

Figures

FIGURE 22. A–C, Strobeus? sp. 1, A–B, ESKU-19-LP 49. C, ESKU-19-LP 90. D–E, Strobeus? sp. 2, D, ESKU-19-LP 217. E, ESKU-19-LP 220. F, Girtyspira? sp., ESKU-19-LP 222. G, Heterosubulites longusapertura sp. nov. ESKU-19-LP 215, holotype. Scale bars represent: 2 mm (A–C); 200 μm (D–G).