Kloedenellitina spinosa Gurevitch, 1972

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 : 16-20

Kloedenellitina spinosa Gurevitch, 1972

Fig. 6B–C

Kloedenellitina spinosa Gurevitch, 1972: 333, pl. 11 figs 3–4.

Kloedenellitina spinosa – Tschigova 1977: 171, pl. 41 fig. 13.

Material examined

CHINA • 1 complete carapace (♀, Fig. 6B ); Blue Snake section, Gelaohe Formation, sample 19BAI 60; P6M 3857 • 1 complete carapace (♂, Fig. 6C ); Blue Snake section, Gelaohe Formation, sample 19BAI 69; P6M 3858 • 16 complete carapaces; Blue Snake section, Gelaohe Formation, samples 19BAI 60, 19BAI 67–69, 19BAI 74, 19BAI 80. All from the Famennian, late Devonian.

Dimensions

RV: L = 552–783 µm, H = 307–394µm, H/L = 0.48–0.59.

LV: L = 434–761 µm, H = 210–377 µm, H/L = 0.45–0.56.

Remarks

In the genus Kloedenellitina, females have an inflated posterior carapace, which corresponds to a brood pouch ( Ellis & Messina 1964). This character allows us to distinguish females ( Fig. 6B ) from males ( Fig. 6C ) in the studied material. The lateral surface of the specimens preserving their carapace appears as reticulate ( Fig. 6C ), it is rather smooth in steinkern but the reticulation remains visible in certain areas ( Fig. 6B ). Our material is smaller than the type material (L = 760–930 µm, H = 440–490 µm in Gurevitch 1972) with H/L between 0.53 and 0.58 while it is between 0.45 and 0.59 in our material (both valves taken together). The specimen shown in Tschigova (1977: pl. 61 fig. 13) is also larger with L = 1200 mm, H = 556mm but the H/L ratio is similar (H/L = 0.46). In the present material, this species may mainly be represented by juvenile specimens corresponding to at least two different ontogenetic stages that we cannot discriminate because of the wide distribution of their dimensions.

Occurrence

Torchinsk Formation,Volyn region, Russian platform,Tournaisian, early Carboniferous(Gurevitch 1972). Lebedyan horizon, Torchinsk Formation, Central regions of the Russian platform, Famennian, late Devonian ( Tschigova 1977). Samples 19BAI 60, 19BAI 67–69, 19BAI 74, 19BAI 80, 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.