Lophomastix sp.

Marin, I. N. & Kolevatov, V. A., 2022, A living fossil: modern and paleontological records of spiny sand crab Lophomastix japonica (Duruflé, 1889) (Anomura: Blepharipodidae) from the Russian coasts of the Sea of Japan and fossil Lophomastix sp. from the western coast of Kamchatka (Sea of Okhotsk), Arthropoda Selecta 31 (1), pp. 34-40 : 36-38

publication ID	https://doi.org/10.15298/arthsel.31.1.04
DOI	https://doi.org/10.5281/zenodo.15557072
persistent identifier	https://treatment.plazi.org/id/993687B9-F60B-FFB1-FC75-FA2A0447224D
treatment provided by	Felipe
scientific name	Lophomastix sp.
status

Treatment

Lophomastix sp.

Fig. 3 b View Fig .

MATERIAL EXAMINED. Fossil record: 1 extant (fossil) anterior part of carapace (approximate CL. 35 mm), PIN 5856 View Materials – Upper Miocene, western coast of Kamchatka (Sea of Okhotsk), Kovran village , 57°12′12.1″N 156°53′08.8″E, Voy Cape, exact locality unknown, November 1987, coll. N.N. Kalandadze ( PI RAS) GoogleMaps .

REMARKS. The discovered remains of the carapace are severely damaged, the most anterior and all the posterior regions are lost (see Fig. 3b View Fig ). The carapace is probably slightly longer than wide; mesogastric region smooth laterally with medial triangle of jagged, setose, corneous grooves; CG4 with two sinuous, crenulate lateral elements each approximately one-third carapace width; hepatic region with scattered, transverse, corneous lines; metagastric region strongly carinate, covered in short corneous grooves; CG5 absent; CG6 sinuous and crenulate, oblique lateral elements separate from posteromedial and deeply indented concave element; CG7 absent; cardiac region smooth laterally, with triangle of setose punctae medially; CG8 faint, paralleling medial portion of CG6 but extending more laterally.

The carapace of Lophomastix sp. is very similar to L. japonica , but due to severe damage, accurate species identification and comparison is not possible.