Pseudobatostomella sp.

Tolokonnikova, Zoya A. & Fedorov, Petr V., 2022, Late Devonian-early Carboniferous bryozoans from Zhankurgan (Greater Karatau, Kazakhstan) - taxonomy and palaeobiogeographical implications, Zootaxa 5196 (2), pp. 252-264 : 259

Pseudobatostomella sp.

Figs 3H, I , Table 4

Material. SibGIU 12/27 (sections).

Description. Thin branched colony 2.75–3.25 mm in diameter with 1.00– 1.25 mm wide endozones.Autozooecia long in endozones, bending at low angles in exozones. Autozooecial diaphragms complete, rare, located in the transition between endo- and exozones. Autozooecial walls laminated, 0.02 mm thick in endozone. Exilazooecia 0.10–0.15 mm wide, short, common.

Comparison. The present material differs from P. majusculа Volkova, 1974 ( Volkova 1974) from the lower Famennian of Gorny Altay in larger exilazooecia (0.10–0.15 mm vs. 0.06–0.10 mm in P. majusculа ). The available material is not sufficient to make a comprehensive comparison.

Stratigraphical and geographical ranges. Ermaksy Formation, lower-middle Famennian (upper Devonian); Karatau, Zhankurgan outcrop, Kazakhstan.

Figures

FIGURE 3. Early-middle Famennian bryozoans from Zhankurgan outcrop. SibGIU 12/25: A-E Cyphotrypa sp. A, B. transverse section; C, D. longitudinal section showing abundant diaphragms (arrow) and wall microstructure with bulges; E. tangential section. SibGIU 12/26: F, G Anomalotoechus sp. F. tangential section; G. transverse section; SibGIU 12/27: H, I Pseudobatostomella sp. H, I. longitudinal section showing short exilazooecia (arrow).