Sherbetra, Shɨshkin-Skarð, 2024

Shɨshkin-Skarð, Yegor, 2024, Sherbetra nom. n. (gen.) pro Trisulcus Popofsky 1913 non Hitchcock 1865 (Amphiactinaria nom. clad. n., Polycystina, Rhizaria), with six new combinations, Zootaxa 5474 (4), pp. 441-444 : 442-443

Sherbetra nom. n. (gen.) (under ICZN)

Diagnosis (from Petrushevskaya 1981 p. 121): The shell is swollen at the junction of the cephalis and trilobate thorax; the cephalis partly immersed in a trilobate thorax; the eucephalic chamber is hemispherical or spherical; the cephalis belongs to the type II (following Petrushevskaya 1981); the lateral lobes of the cephalis and its postcephalic lobe, fused with the thorax, are often well developed; the lobes are separated by furrows formed by the junction of spines D, L l, and L r with the thoracic wall; those spines partly protrude outside the wall from these grooves as external appendages; the spine A protrudes outside as the Apical horn, which has the width similar to the spines D, L l, and L r; it comes out subapically at the junction of the eucephalic chamber with the lateral lobes; the Axobate (Ax) is short or not developed; the thorax ( II segment) is often approximately equal in length to cephalis (I segment) if measured from MB, but thorax ( II segment) can be quite long, cylindrical in its distal part, bearing unstable constrictions, dividing it into 2–3 sections; the wall is hyaline; the pores are disordered, smaller in the upper part, becoming larger towards the mouth; the mouth is often open, unformed .

Note 2: External parts of the spines are often broken off.This was the case with A. Popofsky’s specimen ( Petrushevskaya 1981 p. 121).

Epoch: Eocene?–Recent.

Etymology: for the external morphology of genus members resembling four balls of sherbet, one lying above the other three, slightly thawed, flowing over one another and forming a veil below; portmanteau from English sherbet (frozen dessert of fruit juice with dairy products)—a word with a multistage history of borrowing: from Arabic شَرْبَة [šarba] through Persian تبرش [šarbat], Ottoman Turkish تبرش [şerbet], and, finally, Turkish şerbet—and Ancient Greek τετρα (tetra)—four.

Grammatical gender is feminine.

Zoobank LSID: urn:lsid:zoobank.org:act:D590CF86-92C7-47CE-A7A5-41A7AE1E1CE4

Type species: Trisulcus triacanthus Popofsky 1913 —original binomen (in accordance with Recommendation 67B of ICZN); now Sherbetra triacantha ( Popofsky 1913) comb. n.

Note 3: Petrushevskaya (1975) lumped Trisulcus Popofsky 1913 with Botryopera Haeckel 1887 . Nevertheless, this was done partly (three non-type species of Trisulcus ). Soon she clearly distinguished Trisulcus and Botryopera in Petrushevskaya & Kozlova (1979 p. 122) and Petrushevskaya (1981), as do Renaudie & Lazarus (2012; 2013), Trubovitz et al. (2022), and other authors.