Arctocypris, Petkovski, Trajan K., Scharf, Burkhard & Keyser, Dietmar, 2016

Petkovski, Trajan K., Scharf, Burkhard & Keyser, Dietmar, 2016, Arctocypris fuhrmanni, n. gen., n. sp. (Crustacea, Ostracoda, Eucypridinae) from Spitsbergen (Norway), Zootaxa 4066 (2), pp. 152-160 : 154

Genus Arctocypris n. gen.

Diagnosis ( Figs 2–5 ). Relatively small (0.8 to 1.2 mm) species. Carapace in lateral view subtriangular, greatest height in front of the middle, slightly more than half of the total length. Anterior margin broad, posterior margin narrower, but rounded. Ventral margin slightly concave with a rounded expansion in the mouth area, and slightly enlarged frontally. In dorsal view carapace oval, anterior end pointed, posterior bluntly rounded. Lateral sides only slightly arched. LV overlaps RV along entire free margin. Two conspicuous inner lists running parallel on the inner calcified lamella, more pronounced in the anterior part. Maxillary palp with cylindrical terminal palp segment, about twice as long as broad. Two teeth setae of the third maxillary endite serrate. Maxilliped (T1) with c-seta. Walking leg (T2) with only one seta (d1) at the basal segment.

Included species: Type species: Arctocypris fuhrmanni n. gen., n. sp. Other species: A. arctica ( Olofsson, 1918) comb. nov; A. foveata ( Delorme, 1968) comb. nov.; A. dulcifons ( Diebel & Pietrzeniuk, 1969) comb. nov.

Figures

FIGURE 2. Arctocypris fuhrmanni n. gen., n. sp. A ─ left valve; B ─ right valve.

FIGURE 3. Arctocypris fuhrmanni n. gen., n. sp. A ─ antennule; B ─ antenna; C ─ diagram of the apical view of the antenna, showing position of terminal claws and setae of the terminal (small circle) and penultimate segment (large circle); D ─ foodrake; E ─ palp and masticatory lobes of Mx 1; F ─ maxilliped; G ─ anterior part of maxilliped.

FIGURE 4. Arctocypris fuhrmanni n. gen., n. sp. A ─ walking leg; B ─ cleaning leg; C ─ uropod, uropodal attachment and genital lobe.

FIGURE 5. Arctocypris fuhrmanni n. gen., n. sp. (A – E): A ─ LV, exterior single valve, length 1.04 mm; B ─ LV, interior, length 1.09 mm; C ─ RV, exterior single valve, length 1.09 mm; D ─ RV, interior, length 1.07 mm; E ─ carapace, dorsal view, length 1.06 mm.