Warthia, Waagen, 1880

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 : 7

Warthia sp. 1

( Fig. 5 E–G)

Material. One specimen: ESKU-19- LP 20.

Dimensions (mm): ESKU-19- LP 20: height = 6.2; width = 4.9; thickness = 5.4.

Description. Compressed involute bellerophontiform shape, longer than wide; dorsum rounded; whorl seemingly geniculate in lateral view; whorls smooth without visible ornament, slit not observed; anomphalous; inductura smooth and thick; aperture kidney-shaped in transverse section but not broad; lateral lips gently sickle-shaped and thick, joining anterior lips at an angle of nearly 100 degrees; anterior lip curved and thin.

Remarks. This bellerophontiform shell is a typical representative of the genus Warthia , which is widespread and diverse in the Late Palaeozoic and has been reported from the Middle Permian of Thailand (e.g., Ketwetsuriya et al. 2016, 2020). However, the preservation of the material at hand is insufficient for species identification.

Figures

FIGURE 5. A–D, Warthia cf. welleri Yochelson, 1960, ESKU-19-LP 24. E–G, Warthia sp. 1, ESKU-19-LP 20. H–J, Warthia? sp. 2, ESKU-19-LP 57. All scale bars represent 2 mm.