KOROVCHINSKYI, Kotov & Garibian & Bekker & Taylor & Karabanov, 2021

Kotov, Alexey A., Garibian, Petr G., Bekker, Eugeniya I., Taylor, Derek J. & Karabanov, Dmitry P., 2021, A new species group from the Daphnia curvirostris species complex (Cladocera: Anomopoda) from the eastern Palaearctic: taxonomy, phylogeny and phylogeography, Zoological Journal of the Linnean Society 191 : -

DAPHNIA ( DAPHNIA ) KOROVCHINSKYI SP. NOV.

( FIGS 2–4)

LSID: urn:lsid:zoobank.org:act:ED643231-29A8-40E9-8E7C-890ED9E94FC0

Daphnia sp. nov., clade I in Kotov & Taylor, 2019: figs 1, 2.

Etymology: This species is dedicated to N. M. Korovchinsky, renowned Russian cladocerologist, who participated in collection of samples in Khabarovsk Territory, including the type specimens.

Type locality: Puddle 2 in a rut (48.40289°N, 134.8769°E), Island of Bol’shoy Ussuriysky in the Amur River , Khabarovsk Territory, Russia. The type series was collected on 1 September 2007 by A. A. Kotov and N. M. Korovchinsky .

Holotype: A parthenogenetic female, MGU ML172 . Label of the holotype: ‘ Daphnia korovchinskyi sp.nov., 1 parth. ♀ from a puddle at Island of Island of Bol’shoy Ussuriysky, Khabarovsk Territory, Russia, HOLOTYPE’.

Paratypes: Twelve females, MGU ML173 . Eleven females, MGU ML174 . The rest of specimens, AAK M-0625. Twenty females from a pond (48.62314°N, 135.1366°E) near Vinogradovka village , near a road to Khohlatskaja Protoka of the Amur River , Khabarovsk Territory , collected on 2 September 2007 by A. A. Kotov and N. M. Korovchinsky, AAK M-0630 .

Short diagnosis: Parthenogenetic female. Body subovoid, caudal spine short. Head relatively large, with a low anterior crest, head posterior margin with a strong, arched projection, a deep incision between antenna I and labrum base. Rostrum relatively short (as a result, tips of longest aesthetascs reach its tip); rostrum tip slightly bent posteriorly and subdividing into two lobes by a ‘line’ of prerostral fold, with posterior lobe always smaller than anterior one. Spinules occupy less than half of dorsal and ventral valve margin. In posteroventral portion of valve, on inner face of valve, there are fine setae with setules between them. First abdominal process almost straight, directed anteriorly; second process short, bent distally; third process as a massive mound on the segment. Postabdomen with a smooth postanal angle. Postabdominal claw with first pecten consisting of stout, thin teeth; second pecten consisting of seven to ten large teeth; third pecten consisting of numerous, fine setules. Body of antenna I completely reduced; antennular seta arising immediately from head surface; aesthetascs protruding posteroventrally, and their tips do not reach tip of rostrum. Limb I with relatively long setae 3; limb II with an anterior seta 1 about two-thirds length of other setae, bilaterally setulated distally and 11–12 setae of filter plate of gnathobase; limb III with seta 2 of exopod longer than seta 4, bearing short setules; seta 3 on inner distal portion of limb rudimentary; limb V with projected inner distal portion.

Juvenile female I with a single necktooth. Ephippial female. Male unknown.