Dorotea, Corbari & Frutos & Sorbe, 2019

Corbari, Laure, Frutos, Inmaculada & Sorbe, Jean Claude, 2019, Dorotea gen. nov., a new bathyal genus (Amphipoda, Eusiridae) from the Solomon Sea (Papua New Guinea), Zootaxa 4568 (1), pp. 69-80 : 71-72

Genus Dorotea gen. nov.

Diagnosis. Body not strongly compressed, dorsally smooth. Rostrum short. Head lateral lobe weakly produced. Eyes lacking. Antennae medium size and flagella calceolate in females. Antenna 1 probably slightly longer than antenna 2, peduncular article 1 subequal to article 2, accessory flagellum 1-articulated, linear. Antenna 2, peduncular article 4 thicker than article 5, flagellum not shortened. Upper lip evenly rounded distally. Lower lip, inner lobes weak. Left mandible, incisor with long incurved cutting edge, poorly dentate (2+), ending in a strong blunt tooth; lacinia mobilis 5-dentate; setal row with 6 setae; palp, article 3 longer than article 2, slightly falciform, tapering distally; article 2 thicker than article 3. Right mandibule, incisor with at least a strong blunt tooth; molar triturative; setal row with 6 setae. Maxilla 1, inner plate with 3 subapical setae; outer plate with 10 apical stout setae; palp slender, distal article longest. Maxilla 2, inner plate broader and shorter than outer plate. Maxilliped palp, articles ordinary; outer plate large; inner plate with 3 apical teeth. Coxae 1–4 regular, medium; coxa 1 broadly rounding, not produced; coxa 4 slightly excavate posteriorly. Coxae 5–6 bilobate. Gnathopods 1–2 subsimilar, both strongly subchelate; carpal lobes broad; propodus large, posterior margin short, palm oblique, margin spinose. Pereopods 3–4 slender, merus slightly longer than carpus, dactylus simple, stout and medium length. Pereopods 5– 7 homopodous, subequal in form and size, not greatly elongate; bases broad, with small postero-distal lobe; dactylus simple, stout and medium length. Epimerae 1–3, regular, not serrate on posterior margin. Uropods 1–2, rami lanceolate, outer ramus shorter than inner ramus. Uropod 3, rami broadly lanceolate, outer ramus shorter than inner ramus. Telson elongate, lobate, weakly cleft. Brood plates on pereopods 2–5. Coxal gills on pereopods 2–7.

Etymology. The new genus Dorotea is morphologically close to the eusirid Cleonardo Stebbing, 1888 , a generic name taken by the author from a character of the famous Cervantes’s novel Don Quijote de la Mancha. The name Dorotea is also taken from another character of this novel, the unfortunate daughter of Clenardo (true spelling in accordance to Cervantes’s text). The genus is feminine.

Remarks on genus assignation to Eusiridae . According to the keys of Barnard & Karaman (1991) and Bousfield & Hendrycks (1995), the combination of several morphological diagnostic characters observed on our specimen confirms its position within the family Eusiridae : body large (BL> 10 mm); accessory flagellum small, 1-articulated; large, strongly subchelate gnathopods; pereopods 5–7 elongate, slender; antennae calceolate (eusiridtype); telson elongate, cleft distally and distinctly bilobate.