Bairdioidea ? indet.

Fig. 11R

Material examined

CHINA • 1 complete carapace (Fig. 11R); Blue Snake section, Gelaohe Formation, sample 19BAI 63; P6M 3975 • 1 complete carapace; Blue Snake section, Gelaohe Formation, sample 19BAI 60. All from the Famennian, late Devonian.

Dimensions

RV: L = 375–419 µm, H = 228–237µm

LV: L = 388–432µm, H = 236–247 µm.

Remarks

This species is rare in the studied material. Its outline is typical of Podocopida and its lateral surface is characterized by 4 large nodes along the free margin and 3 other large nodes along the dorsal margin. This species is morphologically close to some ornamented Bairdiidae like the Triassic genus Nodobairdia Kollmann, 1963 which has large nodes in the dorsal part on the carapace but these forms of Bairdiidae are unknown from the Devonian and Carboniferous. Moreover, the overlap is reversed compared to most of genera among Bairdiidae, which is rare in this family. We cannot discuss further the systematic position of these specimens, even at family level, until more material will be available.

Occurrence

Samples 19BAI 60, 19BAI 63, Gelaohe Formation, Blue Snake section, Famennian, late Devonian (this work).