Camptocercus fennicus Stenroos 1898

• Main Author: Sinev, Artem Y.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Branchiopoda; Diplostraca; Camptocercus; Camptocercus fennicus; Kolyma; Suola; Swamp Lake; Yakutia
• Online Access: https://zenodo.org/record/6137465; https://doi.org/10.5281/zenodo.6137465

Camptocercus fennicus Stenroos, 1898 (Figs. 9–11) Stenroos, 1898: 198–200, 202, Table 3, Fig. 19–24; Krasnodebsky, 1937: 426–430, Fig. 1; Smirnov, 1971: 436, Fig. 529, 530. Smirnov, 1998: 66–70, Fig. 22–27. Material examined. 17 parthenogenetic females from Russia, Moscow Area, Ruza district, lake Glubokoe, 27.06.2014; coll. P.A. Garibyan. Parthenogenetic female, from Russia, Yakutia Autonomous Republic, a swamp at right side of the "Kolyma" Federal Road near crossing with the Suola River, 62,09933º N, 130,1467º E; 25.08. 2010, coll. A. A. Kotov; AAK 2011 -059. Adult male from Russia, Yakutia Autonomous Republic, swamp lake near lake Beloe, 63,40659º N 128,90326º E; 5.09.2012; coll. E.I.Bekker & A.I. Klimovskij; AAK-M- 2601. Description. Parthenogenetic female. Body (Fig. 9 A,B, J) with well-expressed dorsal keel, moderately high, fusiform in lateral view (height/length ratio about 0.65 in adult); maximum height in the second quarter of body; strongly compressed laterally. Dorsal margin highly arched, without depression between valves and head shield. Posterodorsal angle broadly rounded; posterior margin convex. Posteroventral angle broadly rounded. Ventral margin (Fig. 9 C,D) unevenly convex in anterior half, almost straight in posterior half, with about 50–60 short ventral setae. Row of ventral setae ends at about 2 / 3 length of ventral margin, followed by numerous very short setules, subdivided into unclear groups. Posteroventral angle (Fig. 9 E,F) with 1–3 small denticles; distance between denticles 2–3 widths of denticle base. Anteroventral angle rounded. Valves with prominent sculpture in shape of diagonal, almost never anostomosing lines; in anteroventral portion of valves, curved upward. Keel oblique on both valves and shield. Head (Fig. 10 A,B,H) with acute, triangular rostrum, protruding downward. Head keel wide, distance from eye to keel margin about 2–3 diameters of eye. Ocellus smaller than eye. Distance from tip of rostrum to ocellus 3 times greater than distance between ocellus and eye. Head ...