Daphnia (Daphnia) sinevi Kotov, Ishida & Taylor, 2006

Garibian, Petr G. & Kotov, Alexey A., 2020, A new species of the Daphnia sinevi group (Crustacea: Cladocera: Daphniidae) from Sakhalin Island, Russian Far East, Zootaxa 4820 (3), pp. 485-505 : 486-490

publication ID

https://doi.org/ 10.11646/zootaxa.4820.3.4

publication LSID

lsid:zoobank.org:pub:DC825616-0AB1-47E7-9A41-C5C08363EBCA

DOI

https://doi.org/10.5281/zenodo.4434298

persistent identifier

https://treatment.plazi.org/id/C514AC00-BE2D-4529-8FB6-5B47FC6BFB5C

treatment provided by

Plazi

scientific name

Daphnia (Daphnia) sinevi Kotov, Ishida & Taylor, 2006
status

 

Daphnia (Daphnia) sinevi Kotov, Ishida & Taylor, 2006 View in CoL

( Figs 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Daphnia (Daphnia) sinevi Kotov, Ishida & Taylor, 2006: p. 1070 View in CoL –1077, figs 3–5; Kotov et al. 2011a: p. 405.

Daphnia sinevi View in CoL group clade H in Kotov & Taylor 2019: figs 1–2.

Type locality. “ A pond about 10 m in diameter in Avangard, Nakhodka Area (42º 48’ N, 132º 53’ E), Primorski Krai, Russia ” ( Kotov et al. 2006) GoogleMaps .

Type material. Holotype. A parthenogenetic female, MGU Ml 46.

Allotype. Adult male, MGU Ml 47.

Paratypes. 20 parthenogenetic females, MGU Ml 48; 3 ephippial females, MGU Ml 49, 12 juvenile and adult males, MGU Ml 50; 12 females, AAK 2005-195.

Material examined here. Primorski Territory. Many males, ephippial and parthenogenetic females from: a pond 10 m in diameter in Avangard, Nakhodka Area, coll. on 25.09.2004 by A.Y. Sinev (type locality), AAK M-0061 ; puddle 1 and 2 near Komarovka River, Ussurisky Nature Reserve , coll. on 09.092009 by P.A. Sorokin (43.64833° N, 132.3951° E), AAK M-1301-1302 GoogleMaps ; a puddle near the shore of Khanka Lake near the TINRO station, coll. on 12.09.2009 by N.M. Korovchinsky (44.76017° N, 132.0577° E), AAK M-1278 GoogleMaps ; a puddle near the reservoir of Luchegorskaya power station, coll. on 10.09.2007 by A.A. Kotov & S.A. Ivanov (46.45208° N, 134.2991° E), AAK M-0651 GoogleMaps ; a puddle, Partizanskaya Street 1, village of Fedoseevka, coll. on 10.09.2007 by A.A. Kotov & S.A. Ivanov (46.53117° N, 134.2777° E), AAK M-0652 GoogleMaps ; an oxbow lake, near River of Schegolikha, coll. on 10.09.2007 by A.A. Kotov & S.A. Ivanov (46.54158° N, 134.2648° E), AAK M-0653. GoogleMaps Khabarovsk Territory. Many males, ephippial and parthenogenetic females from puddles 1 and 2, Pionerskaya Street , Khabarovsk , coll. on 31.08.2007 by A.A. Kotov & N.M. Korovchinsky (48.39455° N, 135.0905° E), AAK M-0616, AAK M-0617, AAK M-0654 GoogleMaps ; a roadside ditch, road to village of Sinda, 30.08.2007 by A.A. Kotov & N.M. Korovchinsky (48.97978° N, 136.3089° E), AAK M-0615 GoogleMaps .

Diagnosis. Parthenogenetic female. Body subovoid, maximum height in middle of valves. Dorsal margin of valves slightly elevated above head, shallow depression between head and rest of body. Postero-dorsal angle with a short a caudal spine ( Fig. 1 View FIGURE 1 A–C) or lacking it (as in type series, see Kotov et al. 2006). Head with a moderate rostrum; in lateral view, the tip subdivided into two lobes. Posterior margin of head with a strong prominence proximally to antenna I ( Fig. 1D, E View FIGURE 1 ). Sometimes a low crest developed on head ( Fig. 1B View FIGURE 1 ), while other populations lacking of a crest, compound eye large, ocellus small and located far from base of antenna I. Spinules present on dorsal and ventral margins only near caudal spine or completely absent when spine reduced ( Fig. 1C View FIGURE 1 ). Postabdomen elongated, lacking of setules ( Fig. 1C View FIGURE 1 ). Preanal margin long, slightly concave, with series of minute setules. Postabdominal claw with basal pecten consisting of stiff setules; second pecten of 5–7 teeth increasing in size distally; third pecten consisting of fine setules. Antenna I as a very low stump, with nine aestetascs of different length terminally, their tips reaching tip of rostrum ( Figs. 1D, E View FIGURE 1 ). Denticles on proximal portion of the distal segment of seta 2 on exopodite III are distributed similarly to following denticles. Exopod setae 1 and 2 on limb V of unequal size.

Ephippial female. Postero-dorsal portion of valves incorporated into ephippium.

Adult male. Body low; dorsal margin of valves straight; postero-dorsal angle distinct, with a short caudal spine ( Fig. 2A View FIGURE 2 ). Head with a moderately developed rostrum; region of antenna I joint with a special depression ( Fig. 2 View FIGURE 2 BD). Anteriormost extremity fully occupied with optic vesicle; a very shallow supra-ocular depression posteriorly to it, or completely absent. Compound eye large, ocellus small. Valves with anterior-ventral angle distinctly prominent ventrally; all ventral margins with long, numerous setae located submarginally on inner face of valve ( Fig. 2 View FIGURE 2 E–F). Posterior portion of valve with a row of setulated setae and rows of minute setules between them ( Fig. 2 View FIGURE 2 G–I). Spinules present on dorsal and ventral margins only near caudal spine ( Fig. 2 View FIGURE 2 J–K).

Abdomen with reduced processes, only small mound present on each first and second segment from basal end ( Fig. 2 View FIGURE 2 L–M). Postabdomen shape and armature in general same as in female, but preanal margin shorter. Postanal portion with 8–11 paired large teeth that strongly increasing in size distally. Gonopore opens subdistally, without a genital papilla ( Fig. 2N View FIGURE 2 ). Outer surface of postabdominal claw with three pectens: basal pecten of stiff setules; second pecten of 5-7 teeth with size slightly increasing distally; third pecten with fine numerous setules ( Fig. 2 View FIGURE 2 N–P).

Antenna I long, relatively straight; antennular seta located far from distal end of antenna I body, small, its length approximately as antenna I diameter; aesthetascs of different length ( Fig. 3 View FIGURE 3 A–B). Male seta on top of a distal process, long and bisegmented; distal segment setulated, with a hooked tip ( Fig. 2 View FIGURE 2 B–D).

Limb I ( Fig. 3C View FIGURE 3 ) with ODL large, cylindrical, with a small and a very large setae ( Fig. 3D View FIGURE 3 ) setulated distally with minute setules ( Fig. 3E View FIGURE 3 ); IDL bearing a bent copulatory hook and two setae of different size, endite 3 with four setae ( Fig. 3 View FIGURE 3 C–E). Limb II distalmost endite bearing a modified hook-like setae 1 setulated distally ( Fig. 3 View FIGURE 3 F–G).

Juvenile male. Body subovoid; head with a very short rostrum ( Fig. 3H View FIGURE 3 ), sometimes with a neck tooth (see Kotov et al. 2006). Carapace dorsal margin almost straight; caudal spine well-developed, and 1/3–1/2 of ventral margin covered by spinules ( Fig. 3H View FIGURE 3 ). Postabdomen as in adult male ( Fig. 3J View FIGURE 3 ). Limb I ODL ( Fig. 3K View FIGURE 3 ) long seta shorter than in adult males; copulatory hook shorter and almost straight ( Fig. 3 View FIGURE 3 K–L).

Size. Parthenogenetic female 0.69–1.73 mm, male 1.01–1.22 mm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Branchiopoda

Order

Diplostraca

Family

Macrothricidae

Genus

Daphnia

Loc

Daphnia (Daphnia) sinevi Kotov, Ishida & Taylor, 2006

Garibian, Petr G. & Kotov, Alexey A. 2020
2020
Loc

Daphnia sinevi

Kotov & Taylor 2019
2019
Loc

Daphnia (Daphnia) sinevi

Kotov, Ishida & Taylor 2006: 1070
2006
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