Kloedenellitina sincera Tschigova, 1960

Guillam, Elvis, Forel, Marie-Béatrice, Song, Junjun & Crasquin, Sylvie, 2022, Late Devonian-early Carboniferous ostracods (Crustacea) from South China: taxonomy, diversity and implications, European Journal of Taxonomy 804, pp. 1-62 : 15-16

Kloedenellitina sincera Tschigova, 1960

Fig. 6A

Kloedenellitina sincera Tschigova, 1960: 223, pl. 8p figs 1–3.

Knoxiella cf. oblonga – Song & Gong 2019: fig. 4p–q.

Material examined

CHINA • 1 complete carapace ( Fig. 6A ); Blue Snake section, Gelaohe Formation, sample 19BAI 69; P6M 3856 • 19 complete carapaces; Blue Snake section, Gelaohe Formation, sample 19BAI 74. All from the Famennian, late Devonian.

Dimensions

RV: L = 360–864 µm, H = 206–455µm, H/L = 0.49–0.59.

LV: L = 360–842 µm, H = 196–435µm, H/L = 0.47–0.56.

Remarks

Knoxiella cf. oblonga Wang, 1978 in Song & Gong (2019) from the Famennian, late Devonian of Baihupo section, Guizhou, South China ( Song & Gong 2019) does not belong to the genus Knoxiella Egorov, 1950 . The specimens shown in Song & Gong (2019: fig. 4p–q) has the typical Kloedenellitina

outline with AB and PB that are in the same plane. It is morphologically similar to Kloedenellitina sincera Tschigova, 1960 from our material and we consider that they are conspecific.

The adult carapace in our material is bigger than the holotype (L = 795 µm, H = 422 µm in Tschigova 1960) but the H/L ratio is similar (H/L = 0.53). The other specimens from our material are smaller and may represent juveniles of this species. The specimen shown in Song & Gong (2019: fig. 4p) is larger than our material and the holotype (L = 970 µm, H = 530 µm) but the H/L ratio is also similar (H/L = 0.55). The posterior part is inflated and shows a vertical sulcus opened ventrally which suggests that it may be a female ( Ellis & Messina 1964). All our specimens are less inflated in the posterior part so they may correspond to males. The size variations clearly indicate that several stages are present in the assemblages studied but it is impossible to discriminate them.

Occurrence

Dankovo–Lebedyan Horizon, Russian platform, Famennian, late Devonian ( Tschigova 1960). Blue Snake section, Guizhou, South China, Gelaohe and Tangbagou Formations, Famennian–Tournaisian, late Devonian–early Carboniferous ( Song & Gong 2019). Samples 19BAI 69, 19BAI 74, Gelaohe Formation, Blue Snake section, Famennian, late Devonian (this work).

Figures

Fig. 6. SEM pictures of ostracods from Blue Snake section, Dushan County, South China, late Famennian–Tournaisian, late Devonian–early Carboniferous. All specimens are temporarily housed in the collections of Sorbonne Université, Paris, France (SU). A. Kloedenellitina sincera Tschigova, 1960, left lateral view of a carapace, sample 19BAI 69 (P6M 3856). B–C. Kloedenellitina spinosa Gurevitch, 1972. B. ♀, right lateral view of a carapace, sample 19BAI 60 (P6M 3857). C. ♂, right lateral view of a carapace, sample 19BAI 69 (P6M 3858). D. Kloedenellitina sygmaeformis Egorov, 1950, right lateral view of a carapace, sample 19BAI 80 (P6M 3859). E. Blessites feluyensis Tschigova, 1977, right lateral view of a carapace, sample 19BAI 39 (P6M 3860). F–I. Hypotetragona angulata (Posner, 1951). F. Adult, left lateral view of a carapace, sample 19BAI 44 (P6M 3861). G. A-1, left lateral view of a carapace, sample 19BAI 02 (P6M 3862). H. A-2, left lateral view of a carapace, sample 19BAI 02 (P6M 3863). I. A-3, left lateral view of a carapace, sample 19BAI 03 (P6M 3864). J–M. Hypotetragona sp. J. Adult, left lateral view of a carapace, sample 19BAI 39 (P6M 3865). K. A-1, left lateral view of a carapace, sample 19BAI 05 (P6M 3866). L. A-2, left lateral view of a carapace, sample 19BAI 60 (P6M 3867). M. A-3, left lateral view of a carapace, sample 19BAI 69 (P6M 3868). N. Knoxiella archedensis Tschigova, 1960, left lateral view of a carapace, sample 19BAI 03 (P6M 3869). O. Knoxiella complanata (Kummerow, 1939), left lateral view of a carapace, sample 19BAI 80 (P6M 3870). P. Knoxiella subcompressa, Wang & Ma, 2007, left lateral view of a carapace, sample 19BAI 68 (P6M 3871). Q–R. Knoxiella cf. subcompressa, Wang & Ma, 2007. Q. Adult, left lateral view of a carapace, sample 19BAI 68 (P6M 3871). R. A-1, left lateral view of a carapace, sample 19BAI 68 (P6M 3872). S–T. Knoxina sp. S. Left lateral view of a carapace, sample 19BAI 80 (P6M 3873). T. Left lateral view of a carapace, sample 19BAI 74 (P6M 3874). U. Knoxites cf. argulata Zaspelova, 1959, adult, left lateral view of a carapace, sample 19BAI 02 (P6M 3875). Scale bars = 100 µm.