Higginsarctus martini Hansen & Kristensen 2021, gen. et sp. nov.

• Main Authors: Hansen, Jesper G., Kristensen, Reinhardt M.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Tardigrada; Heterotardigrada; Arthrotardigrada; Halechiniscidae; Higginsarctus; Higginsarctus martini; Kristensen; North Atlantic
• Online Access: https://zenodo.org/record/5213164; https://doi.org/10.5281/zenodo.5213164

Higginsarctus martini gen. et sp. nov. urn:lsid:zoobank.org:act: 0373D8D1-209D-4853-936F-CC4E5DA584CB Figs 12–13 Diagnosis (characters uniquely defining the taxon are written in bold) Characterized by ovoid, dome-shaped secondary clavae. Bilobed antero-lateral alae with medial pointed indentations. Bilobed medio-lateral alae with medial pointed indentations. Medio-lateral alae smaller than antero-lateral alae. Trilobed postero-lateral alae each with anterior pointed indentation and posterior arched indentation. Postero-lateral alae larger than antero-lateral alae. Quadrilobed, round caudal ala with 3 arched indentations, 1 medial and 2 lateral. Medial lobes of caudal ala smaller than lateral lobes. Leg sense organs I–III with similar length. Genital stoup present. Etymology The new species is dedicated to Dr Martin Vinther Sørensen for his contributions to meiofauna research. Material examined Holotype FRANCE • ♀; North Atlantic Ocean, English Channel, Bay of Morlaix, Roscoff; 48°43′ N, 03°54′ W; depth 20–30 m; 15 Mar. 1982; R.M. Kristensen leg.; Dentalium sand; NHMD-293903. Description HABITUS. The holotypic female (Figs 12–13) is 159 µm long from the anterior margin of the head to the posterior margin of the body. The body is ovoid, being broadest (79 µm) at the level between the second and third pair of legs. Intersegmental folds are not recognisable. ALAE.Typical for the genus, eight alae, which are all clearly separated from each other, are present: frontal ala, a pair of antero-lateral alae, a pair of medio-lateral alae, a pair of postero-lateral alae and a single caudal ala (FigS 12, 13A). The antero-lateral alae each have a medial pointed indentation dividing each ala into two lobes of equal size. The medio-lateral alae which are smaller than the antero-lateral alae, each have a medial pointed indentation dividing each ala into two lobes of equal size. The posterolateral alae which are larger than both the antero-lateral and medio-lateral alae, each have an anterior pointed indentation and a posterior ...