Lepechinella arctica Schellenberg 1926

• Main Authors: Johansen, Per-Otto, Vader, Wim
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Dexaminidae; Lepechinella; Lepechinella arctica; Nordaustlandet; Svalbard; Spitzbergen
• Online Access: https://zenodo.org/record/3794780; https://doi.org/10.5281/zenodo.3794780

Lepechinella arctica Schellenberg, 1926 Figs 2–4 Dorbanella sp. Schellenberg, 1925: 206–207, fig. 6. Lepechinella arctica Schellenberg, 1926: 394. Lepechinella sp. Stephensen, 1938: 271–273. Lepechinella arctica – Barnard 1973: 10. — Barnard & Karaman 1991: 268–269. non Lepechinella arctica – Gurjanova 1951: 674–677, fig. 465 (= Lepechinella eupraxiella Barnard, 1973: 17). Material examined Holotype Parts from peraeon and pleon (Museum für Naturkunde Berlin: Registration no. 19.848). The species is recorded from the Römer & Schaudinn Expedition, st. 41, in the Polar Basin north of Nordaustlandet and Spitzbergen, Svalbard, at position 81 o 20’N, 20 o 30’E, 1000 meters, initially named Dorbanella sp. by Schellenberg (1925), but later the name was changed to Lepechinella arctica by Schellenberg (1926). The description of L. arctica is based on new drawings of the peraeon and pleon in addition to the text and the original drawing of the head made by Schellenberg (1925). The urosome was missing in the original sample. Schellenberg (1925) briefly described the mouthparts and made a drawing of the head, but these parts have unfortunately not been found in the collections. Redescription Holotype Female with fully developed oostegites, length 5.5 mm without urosome. BODY. Two mid-dorsal teeth on peraeon segment 1. Peraeon segments 2–7 with one dorsal tooth each, a few setae and spines, primarily on the dorsal part. Coxal plates with some spines and thin setae. Coxal plate 1–7 decreasing in height posteriorly. Peraeon segments 1–7 with distinctly developed lobes above the coxal plates. HEAD (Fig. 2). According to Schellenberg (1925) (translated from German): “Head short, exclusive of the processes not much longer than 1 st thorax segment. Rostrum shaped as a heavy, acute, horizontal spine, a little wavy, half as long as 1 st joint of antenna 1. Lateral lobe of head not projecting, but provided with 2 marginal spines; postantennal corner acute. No eyes”. MOUTHPARTS. According to Schellenberg 1925 (translated from ...