Bursachitina, Taugourdeau, 1966

Li, Yangui, Yan, Chunbo, Wang, Chuanshang, Maletz, Jörg, Liang, Yan, Yao, Huazhou, Wu, Haizhi, Chen, Weixiong, Cheng, Jingqing, Fang, Zichen & Wang, Xiaofeng, 2025, Chitinozoans from the Telychian (Llandovery, Silurian) Shenxuanyi Member, upper Ningqiang Formation of the northwestern Yangtze Platform, China, Swiss Journal of Palaeontology (20) 144 (1), pp. 1-33 : 16

Bursachitina (?) sp. 1 ( Fig. 4G–I )

Material: Systematic study was performed based on three photomicrographs.

Description: All specimens are flattened, with a short columnar or conical vesicle. Te body flanks are slightly concave, basal margin and base are rounded, and no mucron is observed in the center of the basal region. Te flexure is weak or absent. Te aperture is broken. Te chamber wall surface is smooth.

Measurements: Measured data based on three specimens.

Comparison and remarks: Its morphology is partially consistent with the features of Bursachitina stated by Armstrong and Brasier (2005) and Paris et al. (1999). It is very similar to the Bursachitina sp. from the Telychian of Latvia reported by Loydell et al. (2010). Since its basal region’s features are unclear, and it is different from the typical Bursachitina without flexure by having a very weak flexure, this study tentatively assigned it to Bursachitina (?) sp. 1. It is also different from the Conochitina . According to Paris et al. (1999), Conochitina with a mucron in the centre of the basal region, but Bursachitina (?) sp. 1 does not observe the mucron.

Locality and stratigraphic horizon: Te lower Shenxuanyi Member of Majia section.

Figures

Fig. 4 Llandovery chitinozoans from the Shenxuanyi Member.Scale bars represent 50 μm (except the scale bar of specimens M and P represent 10 μm). A–C Bursachitina rectangularis (Zaslavskaya, 1983) (A N62-4. B N54-12. C N66-7). D–F Bursachitina sp. 1 (D N21-11 & 12. E N39-26. F N37-1). G–I Bursachitina (?) sp. 1 (G N91-4. H N56-5. I N39-3). J-M Eisenackitina causiata Verniers, 1999 (J N59-9. K N60-16. L N87-6. M close-up of N59-9 showing the ornaments). N-P Eisenackitina rimosa Umnova, 1976 (N N45-5. O N43-3. P close-up of N43-3 showing the ornaments).P-Q Eisenackitina venusta Tsegelnjuk, 1982 (P N47-7. Q N47-7)