Marin I.N.*, Palatov D.M. 2025. Two new hyporhean species of the genus Synurella Wrześniowski, 1877 (Amphipoda: Crangonyctidae) from the Russian southern Caucasus // Arthropoda Selecta. Vol.34. No.4: 577–588 [in English].
A.N. Severtsov Institute of Ecology and Evolution of RAS, Leninsky Prosp. 33, Moscow 119071 Russia.
* corresponding author
Ivan Marin: coralliodecapoda@mail.ru https://orcid.org/0000-0003-0552-8456
Dmitry Palatov: triops@yandex.ru https://orcid.org/0000-0002-8826-9316
doi:10.15298/arthsel.34.4.09
ABSTRACT. The article describes two new hyporhean species of the genus Synurella Wrześniowski, 1877 (Amphipoda: Crangonyctidae), Synurella teshebi sp.n. and Synurella psezuapsi sp.n., from Russian southern Caucasus. Both species phylogenetically belong to the “behningi” group, whose species are characterized by stygomorphic morphology, including lack of coloration and partial or complete reduction of eyes, rectangular (about 2.0X longer than wide) palmar margin of palm gnathopod II and some other morphological features. The new species differ from the related species of the “behningi” group in the structure and shape of epimeral plates, gnathopods II, pereopods VI and VII, telson and uropods. The distribution of the representatives of the genus Synurella in the southwestern Caucasus and the phylogenetic relationships between known species are discussed in the article.
KEY WORDS: Crustacea, Amphipoda, Crangonyctidae, Synurella, diversity, phylogeny, hypogean, Caucasus.