Holophryxus citriformis Huys & Savchenko & Kosobokova 2023, SP. NOV.

• Main Authors: Huys, Rony, Savchenko, Alexandra S., Kosobokova, Ksenia N.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Dajidae; Holophryxus; Holophryxus citriformis; Arctic
• Online Access: https://zenodo.org/record/8011027; https://doi.org/10.5281/zenodo.8011027

HOLOPHRYXUS CITRIFORMIS SP.NOV. (FIGS 1 A-E, 2–14) Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: 7F5CBC97-E358-4F5B-9B7B-43944023C4CE. Representative DNA sequences: GenBank accession numbers OK489803 (COI) and OL323109 (18S). Type locality: Central Arctic, 89°0.62’N, 61°26.15’E, sample from side net attached to multinet taken from 0–4300 m depth. Type host: Hymenodora glacialis (Buchholz, 1874) (Pleocyemata, Caridea, Acanthephyridae) (Fig. 1F). Type material: (1) Holotype: adult gravid female, preserved in formalin; pereopods 1–2 from one side mounted on slide; right mandible mounted on second slide; (2) paratype: adult male recovered from marsupial cavity of holotype, preserved in formalin. Collected on 6 September 2015. Type material deposited in Zoological Museum of Moscow State University under registration numbers Mc-1450 and Mc-1451, respectively. Etymology: The specific epithet is derived from the Latin citrus, the name for a lemon [Citrus lemon (L.)], and forma, meaning shape, and alludes to the shape of the female. Differential diagnosis: Holophryxus. Body length 13.0 mm (♀; N = 1), 2.75 mm (♂; N = 1). Colour (based on observation of live specimens) bright orange with darker red area dorsally (indicating position of ovary) in ♀; yellowish-amber in ♂. FEMALE: Body citriform (lemon shaped), about 1.85 times as long as maximum width. Cephalon clearly demarcated from pereon in dorsal aspect by constrictions bilaterally and by weak transverse surface fold dorsally; dorsal prominence with slightly rounded anterior margin, not discernible in ventral aspect; ventral cephalic ridge well developed, distinctly crescentiform, embracing oral area, only small section of frontal part discernible in dorsal aspect, about 0.7 times as long as wide, anterior margin rounded, without paired pit organs; posterolateral corners of cephalic ridge with rounded lobes, representing coxal plates of incorporated first pereonite. Maxillipeds absent. Median sternal plate without paired posteriorly ...