Baikalolkhonia Naganawa, 1999

Rogers, D. Christopher, 2020, Spinicaudata Catalogus (Crustacea: Branchiopoda)., Zoological Studies 59 (45), pp. 1-44 : 29

Baikalolkhonia Naganawa, 1999 fide Galazy & Naganawa 2010 genus inquirenda

Diagnosis: (based on Naganawa 1999; and Galazy and Naganawa 2010) Rostrum with or without an apical spine. All thoracopods bearing a pre-epipodal, cylindrical, elongated, dorsally directed lobe; epipodites without a triangular lamella; pre-epipodites elongated on limbs I–VII. Males unknown.

Comments: This is the only genus I have not examined. Baikalolkhonia tatianae is the type species of the genus. Naganawa (1999 2001b) placed this genus initially in the Cyzicidae in its own subfamily, due to supposed shared characters between Cyzicidae and Leptestheriidae . Brtek (2002) raised the subfamily to family rank with no explanation or justification. This genus is remarkably superficially similar to Eocyzicus and may very well be a junior synonym of that genus, although information in the descriptions is lacking. Baikalolkhonia lacks the epipodital triangular lamella, as does Eocyzicus and all cyzicids. The pre-epipodital cylindrical extensions are found in leptestheriids, but apparently not in the same numbers as in Baikalolkhonia . Both character states described for Baikalolkhonia need to be verified.

The fact that two species in this genus are both endemic to Olkhon Island (some 720 km 2) ( Galazy and Naganawa 2010), and the fact that Naganawa (1999) states that the type series of B. tatianae is immature, strongly suggest that both Baikalolkhonia are the same species.

Attributed Species