Sulcella baisuzhena Guillam & Forel & Song & Crasquin 2022, sp. nov.
Creators: name: Guillam, Elvis
name: Forel, Marie-Béatrice
name: Song, Junjun
name: Crasquin, Sylvie
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Cavellinidae
Sulcella
Sulcella baisuzhena

description: Sulcella baisuzhena Guillam & Forel sp. nov.
urn:lsid:zoobank.org:act: 5E0110EC-49F8-4F34-BC57-C46B3232DAAA
Figs 7Q–U, 8A–B
Diagnosis
A species belonging to the genus Sulcella with elongate outline, VB concave, very long and slightly arched DB. Stragulum absent.
Etymology
The specific epithet refers to the latinization of the Chinese Bai Suzhen (also known as Baishe Niangniang which means White Snake Empress), which is a snake spirit in the Chinese “Legend of the white snake”.
Material examined
Holotype CHINA • 1 complete carapace (Fig. 7Q); Blue Snake section, Gelaohe Formation, sample 19BAI 74; Famennian, late Devonian; P6M 3991.
Paratype CHINA • 1 complete carapace (A–1, Fig. 7R); Blue Snake section, Gelaohe Formation, sample 19BAI 68; Famennian, late Devonian; P6M 3892.
Other material
CHINA • 1 complete carapace (A-1, Fig. 7S); Blue Snake section, Gelaohe Formation, sample 19BAI 68; P6M 3993 • 1 complete carapace (A-2, Fig. 7T); Blue Snake section, Gelaohe Formation, sample 19BAI 68; P6M 3894 • 1 complete carapace (A-3, Fig. 7U); Blue Snake section, Gelaohe Formation, sample 19BAI 68; P6M 8395 • 1 complete carapace (A-4, Fig. 8A); Blue Snake section, Gelaohe Formation, sample 19BAI 68; P6M 3996 • 1 complete carapace (A-5, Fig. 8B); Blue Snake section, Gelaohe Formation, sample 19BAI 68; P6M 3897 • 15 complete carapaces; Blue Snake section, Gelaohe Formation, samples 19BAI 67, 19BAI 68. All from the Famennian, late Devonian.
Dimensions
See Fig. 4C.
Description
Carapace of medium size, elongate with Hmax around to slightly anterior to the ⅓ rd of Lmax, at the junction between DB and ADB; Lmax at mid-H. RV larger than LV, overlapping it all around, sometimes absent or reduced at PVB and AB, stronger along dorsal margin and VB. Dorsal margin with a very long and straight to slightly arched DB, short PDB and uniformly convex ADB. VB concave; AB largely rounded with maximum around mid–H at both valves; PB weakly rounded, PVB slightly truncated. ACA about 155°, PCA close to 90°. Stragulum absent. Surface smooth.
Remarks
The present species is morphologically close to Sulcella kotchoensis Lethiers, 1981 from the Famennian of the Kotcho Formation, Imperial Island River 1, Western Canada (Lethiers 1981) but it has a less stocky morphology, a less convex PVB, a more concave VB and Lmax located higher. Sulcella kotchoensis Lethiers, 1981 is also larger, with L ranging from 580 to 860 µm and H from 300 to 420 µm. The H/L scatter plot of Sulcella baisuzhena sp. nov. (Fig. 4C) allows to discriminate six ontogenetic stages (A-5 to Ad). The ontogenetic development of this species is marked by the elongation of outline and the VB becoming more concave.
Occurrence
Samples 19BAI 63, 19BAI 67, 19BAI 68, 19BAI 74, Gelaohe Formation, Blue Snake section, Famennian, late Devonian (this work).
description: Published as part of Guillam, Elvis, Forel, Marie-Béatrice, Song, Junjun & Crasquin, Sylvie, 2022, Late Devonian-early Carboniferous ostracods (Crustacea) from South China: taxonomy, diversity and implications, pp. 1-62 in European Journal of Taxonomy 804 on pages 28-29, DOI: 10.5852/ejt.2022.804.1689, http://zenodo.org/record/6359315