Caspiomyzon wagneri (Kessler, 1870)

Jouladeh-Roudbar, Arash, Ghanavi, Hamid Reza & Doadrio, Ignacio, 2020, Fig. 4 in Fig. 4 in Fig. 3 in Fig. 21. Sesarmops mora n in Paralbunea dayriti, Zoological Studies 59 (21), pp. 1-303 : 6-7

Caspiomyzon wagneri (Kessler, 1870) – Native ( Fig. 10)

Petromyzon wagneri Kessler [K. F.] 1870: 207; Type locality: Volga River between Tver [Tvertsa] and Astrakhan, Russia, 46°21'N, 48°03'E. Syntypes: SMNS 2398 (1), NMW 61053 (1), ZIN 2407 (2).

Agnathomyzon (Haploglossa) caspicus Gratzianov [V. I.] 1907: 18; Type locality: Kura River near Evlakh, Volga River near Kazan, and Moskva River (Royllier), Russia. No types known.

Common name: Pr: Marmahi-e dehangerd, Dahangerd-e daryaye Khazar; En: Caspian lamprey, Round mouth snake fish.

Diagnosis: Non parasitic diadromous lamprey. Absence of paired fins, a round, suctorial mouth containing blunt teeth, and seven branchial openings. Tubercular teeth with buttom-like shape.

Meristic characters: Trunk myomeres 53–68, supraoral lamina, one unicuspid (sometimes bicuspid) tooth, infraoral lamina, 4–6, usually 5, unicuspid teeth, but sometimes the lateral most ones are bicuspid, 4 endolaterals on each side, endolateral formula, typically 1–1–1–1, 3–5 rows of anterials, first row of anterials, 3 unicuspid teeth; 8 rows of exolaterals on each side, 3 rows of posterials, first row of posterials, 11 unicuspid teeth, transverse lingual lamina straight and 5–8 unicuspid teeth.

Distribution: Caspian Sea basin ( Fig. 11). Reported from Aras River to Atrak River in the entire southern coast of the Caspian Sea, including Anzali Wetland, Sefidrud, Langerud, Babol rud, Tajan Rivers, etc.

Taxonomy: Berg (1949) placed in Caspiomyzon .

Conservation: IUCN: Near Threatened ( Freyhof and Kottelat 2008l).

CLASS CHONDRICHTHYES Order CARCHARHINIFORMES (1 family, 1 genus, 1 species) Family Carcharhinidae (1 genus, 1 species) Genus Carcharhinus Blainville, 1816