Eurycercus nigracanthus Hann 1990

• Main Authors: Bekker, Eugeniya I., Kotov, Alexey A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Branchiopoda; Diplostraca; Eurycercidae; Eurycercus; Eurycercus nigracanthus; Arctic; Newfoundland
• Online Access: https://doi.org/10.5281/zenodo.5631051; http://treatment.plazi.org/id/03CD879F9C37FF8A56A32B45E290FED3

Eurycercus nigracanthus Hann, 1990 (Figs 4–5) Eurycercus ( Teretifrons ) sp. in Frey & Hann 1985, P. 327. Eurycercus nigracanthus Hann 1990, P. 2150, Figs 16–40; Bekker 2012, P. 125–130, Figs 41–42. Type locality. “ Weiss Pond, Avalon Peninsula, Newfoundland, Canada ” (Hann 1990). Unfortunately, the coordinates represented by Hann (1990) are apparently wrong. Type material. Holotype. Parthenogenetic female, USNM 243306. Paratypes. 2 adult males, USNM 243307. 2 juvenile males (instar II) USNM 243308. 2 juvenile males (instar I), USNM 243309. 2 parthenogenetic females, USNM 243310. Other material examined here . All from Newfoundland and Labrador, Canada: 20 parthenogenetic ♀♀ from Oxen Pond (appr. N47.5713°, W52.7623°), coll. in 28.08.1984 by D.G. Frey, DGF 7051. 14 parthenogenetic ♀♀ from Round Pond (appr. N47.7°, W52.81°), N of St. Johnes, coll. in 28.08.1984 by D.G. Frey, DGF 7055. 7 parthenogenetic ♀♀ from Pond along Hgy 1. (appr. N47.36°, W53.05°), 1.5 miles S of Butterpot Provincial Park, coll. in 0 5.09.1984 by D.G. Frey, DGF 7109. 5 parthenogenetic ♀♀ from Fen Pool (appr. N46.88°, W54.11°), East side of road from Cape St. Marys to Hgy 100, coll. in 11.091984 by D.G. Frey, DGF 7135a–b. 22 parthenogenetic ♀♀ from a water body (appr. N47.6°, W52.7°) near Hgy. 1 opposite truck weighing station W of St. John's, coll. in 0 9.1984 by D.G. Frey, DGF 7167- II. 45 parthenogenetic ♀♀ from Pond-G (N49.4931°, W56.4655°), coll. in 30.06.2005 by L.J. Hovind & M. Faustova, DJT 20-115, AAK M-1177, and AAK M-0536. Diagnosis. In lateral view body sub-ovoid (Fig. 4 A), maximum height of the body in its middle portion (BH/ BL= 0.64–0.74; VL/BL=0.80–0.89). In anterior of dorsal view, body not compressed laterally, median dorsal keel absent (Fig. 4 B–C). Rostrum relatively long (Fig. 4 D). Ocellus small. Dorsal head pores located on a pancake-like projection on dorsal margin of head and slightly protrude beyond the edge of the head shield (Fig. 4 E). Lateral head pores small and subcircular (Fig. 4 F). Labrum with a ...