Enteropsis hispida Kim & Boxshall 2021, sp. nov.
Creators: name: Kim, Il-Hoi
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Cyclopoida
Ascidicolidae
Enteropsis
Enteropsis hispida

description: Enteropsis hispida sp. nov.   
(Figs. 177, 178)  
 Type material. Holotype ♀ (MNHN-IU-2014-21581, dissected and mounted on a slide) from Apl ẚdẚum mernççensẚs (Brewin, 1956) (MNHN-IT-2008-552 = MNHN A1 / APL.B/215); New Caledonia, Stn NC 16, platier de l’ïlot Maitre, near l’ïlot Carnard (under stones and in interstices between corals), depth 3-8 m, Monniot coll., 12 September 1985.   
 Etymology. The name of the new species is derived from the Latin hẚspẚd (=hairy), referring to its hairy body.   
 Description of female. Body (Fig. 177A, B) eruciform, unsegmented; body length 832 μm, excluding caudal rami; maximum width 216 μm (across second pedigerous somite). Body surface sparsely ornamented with scattered setules (or sensilla) (Fig. 177A, B, C). Cephalosome, first to fourth pedigerous somites, and genitoabdomen defined by weak lateral and ventral constrictions. Cephalosome slightly narrower than first pedigerous somite, semicircular, 164 μm wide, with sclerotized sculpturing dorsally. First to fourth pedigerous somites each with sclerotized sculpturing dorsolaterally, as shown in Fig. 177A and B. Genitoabdomen tapering, short, 116 μm long, without any trace of articulations; genital apertures positioned laterally in middle of genitoabdomen; anal prominence small, but distinct and bilobed. Caudal ramus (Fig. 177C) represented by large, stiff caudal seta, 87 μm long.   
Rostrum absent. Antennule (Fig. 177D) small, unsegmented, 2.1 times longer than wide (36×17 μm), slightly narrowing distally; armed with 8 naked setae (1 very small). Antenna (Fig. 177E) very small, 32 μm long, digiti- form, 2-segmented; proximal segment unarmed, 16×12 μm; distal segment 16×9 μm, armed with 1 spinulose apical spine (12 μm long) and ornamented with 2 transverse rows of spinules distally.  
Labrum (Fig. 177F) longer than wide, with finely spinulose, convex posterior margin and 1 large, transparent, linguiform protrusion subdistally on ventral surface. Mandible absent. Maxillule (Fig. 177F) 2-segmented; proximal segment unarmed; distal segment bilobed; larger inner lobe tipped with 2 spinulose setae, larger seta 42 μm long, 2.6 times longer than smaller seta, bearing 2 prominent setules near proximal third; smaller outer lobe tipped with 2 equal, small spinulose setae (about 10 μm). Maxilla (Fig. 177G) 2-segmented, subchelate, robust; proximal segment with 1 tubercle-like process on medial margin, opposing tip of terminal claw of distal segment; with pore of maxillary gland subdistally on posterior surface; distal segment bearing strong, curved terminal claw and 1 proximal seta laterally. Maxilliped absent.  
Legs 1-4 (Fig. 178 A-C) 2-segmented; proximal segment (coxa) unarmed, ornamented with large setules on ventral surface; numbers of setules 4 in leg 1, 5 in leg 2, and 3 in legs 3 and 4. Distal segment subcircular or subquadrate, tipped with 1 small claw (representing exopod) embedded in transparent covering and with 1 setule near base of claw; endopod absent. Leg 5 absent.  
 Male. Unknown.   
 Remarks. The armature of the labrum seems to be a useful character for distinguishing between species of bnterçpsẚs. The armature of the labrum is known for most species of the genus, with the exception of b. çnychçphçra Schellenberg, 1922. Schellenberg (1922) described for the labrum as “Oberlippe mit behaarten Borsten” (upper lip with hairy bristles). This indicates that the labrum of b. çnychçphçra is armed with 2 or more setiform processes. In the other 11 known species of bnterçpsẚs the labrum is unarmed (in three species) or armed with 2 to 8 processes (in the remaining eight species) (Table 7). Therefore, the possession of a single, broadly linguiform process on the labrum is a unique feature of bnterçpsẚs hẚspẚda sp. nov.   
 The form and armature of the antenna of bK hẚspẚda sp. nov. also is characteristic. It is digitiform, 2-segmented, and tipped with a spine, whereas in other known species the antenna is typically broad and its distal segment is unarmed, or transformed to a claw, or armed with 2 spines (or setae). bnterçpsẚs hẚspẚda sp. nov. can be distinguished by these two diagnostic features, together with its characteristic caudal rami which are each represented by a single large seta.
description: Published as part of Kim, Il-Hoi & Boxshall, Geoff A., 2021, Copepods (Cyclopoida) associated with ascidian hosts: Ascidicolidae, Buproridae, Botryllophilidae, and Enteropsidae, with descriptions of 84 new species, pp. 1-286 in Zootaxa 1 on page 269, DOI: 10.11646/zootaxa.4978.1.1, http://zenodo.org/record/4820443