Acipenser baerii Brandt, 1869

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 : 13

Acipenser baerii Brandt, 1869 – Non-native ( Fig. 14)

Acipenser baerii Brandt [J. F.] 1869: 115; Type locality: Ob and Lena river systems, Siberia, Russia. Syntypes: whereabouts unknown.

Acipenser Nikolskii stenorrhynchus [A. M.] 1896: 400; Type locality: Large rivers of Siberia flowing to the Arctic. Syntypes: ZIN 10641 (2), 10885 (1), 10888 (1). ZISP 10641 also type of variety baicalensis .

Acipenser stenorrhynchus var. baicalensis Nikolskii [A. M.] 1896: 401; Type locality: Lake Baikal, Siberia, Russia. Syntypes: MLSU 1631 (1), ZIN 10641 (2).

Acipenser baeri hatys Dryagin [P. A.] 1948: 532; Type locality: From Lena to Kolyma rivers, Sakha-Yakutia, northeastern Russia. Syntypes: (27).

Common name: Pr: Tas mahi baeri, En : Siberian sturgeon.

Diagnosis: Extended snouts, four barbels in front of the mouth, the back is light grey to dark-brown colored, the belly color varies from white to clear yellow. Five rows of scutes, Small star-like scutes between the main ones. Clearly slit inferior lips.

Meristic characters: D: 30–56, A: 17–33, GR: 20–49, DS: 10–12, LSC: 32–62, VS: 7–16.

Distribution: Caspian Sea basin ( Fig. 15). Introduced to Iran for aquaculture purpose. Usually individuals of this species escape from fish farms to water bodies. Presence in Iran inland water needs confirmation.

Taxonomy.

Conservation: IUCN: Endangered A2bcd+4bcd (Native population, Ruban and Zhu 2010), PC: Non-native, Not Applicable.