Haplostomides bermudensis 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
Haplostomides
Haplostomides bermudensis

description: Haplostomides bermudensis sp. nov.   
(Fig. 89)  
 Type material. Holotype ♀ (MNHN-IU-2018-1989), 4 ♀♀ paratypes (MNHN-IU-2018-1990), and 2 ♀♀ para- types (dissected, MNHN-IU-2014-17381) from mçlyclẚnum cçnstellatum Savigny, 1816 (MNHN-IT-2008-6981 = MNHN A1 / POL.B/3); St David’s I., Bermuda, 1970.   
 Etymology. The new species is named after its type locality.   
 Description of female. Body (Fig. 89A) similar to e. sẚmẚlẚs sp. nov. in form, unsegmented, curved dorsally, and narrowing anteriorly. Body length 4.20 mm; maximum width 0.97 mm in posterior quarter. Intervals between first to fourth legs 0.76, 0.98, and 1.21 mm, respectively. Genitoabdomen short, not defined from metasome. Caudal ramus (Fig. 89B) slightly wider than long (25×29 μm), indistinctly defined from genitoabdomen, armed with 1 distal spine and 2 setae (1 at proximal third of outer margin and 1 dorsal, subdistally); distal spine longer than wide (11×8 μm). Egg sac (Fig. 89D) 3.26× 0.29 mm, containing 3 or 4 rows of eggs; each egg about 170 μm in diameter.   
Rostrum (Fig. 89C, E) small, much wider than long, ornamented with minute spinules subdistally and 4 minute sensilla proximally. Antennule (Fig. 89F) 4-segmented; armature formula 3, 1, 2, and 10+2 aesthetascs; terminal segment subdivided by partial suture in middle of posterior side into parts bearing 4+aesthetasc and 6+aesthetasc. Antenna (Fig. 89G) 2-segmented; proximal segment (coxobasis) unarmed; distal segment (endopod) with 2 larger distal and 2 very small subdistal spines; all spines articulated at base.  
Labrum (Fig. 89H) weak, flexible, unornamented, with broadly convex posterior margin. Mandible (Fig. 89I) digitiform, tapering distally, with slight constriction distally and 2 small setae subapically. Maxillule (Fig. 89J) incompletely 2-segmented; proximal segment (precoxa) with 3 setae (distalmost rudimentary); distal segment (palp) roughly quadrate, with 5 setae (4 outer and 1 distal), distal seta shorter than other 4. Maxilla (Fig. 89K) as broad lobe bearing 1 apical and 1 subapical seta. Maxilliped (Fig. 89L) 4-segmented; first segment broad, unarmed; second segment with 2 small setae; third and fourth segments small, unarmed; terminal claw small, conical, half as long as fourth segment.  
Legs 1-4 biramous, consisting of protopod, exopod, and small endopod (Fig. 89 M-O). Both rami not articulated from protopod; protopods with outer seta. Exopods of legs 1, 3, and 4 each armed with 1 seta and 2 spines (Fig. 89M, O). Exopod of leg 2 (Fig. 89N) armed with 1 seta and 3 spines. Endopod rather distinct, bearing 1 or 2 sensilla. Endopods of legs 3 and 4 shorter but broader than in legs 1 and 2.  
Leg 5 represented by 2 minute setae. Leg 6 represented by 1 spine and 1 spiniform process in genital area, accompanied by 5 internal, tooth-like elements.  
 Male. Unknown.   
 Remarks. In the genus eaplçstçmẚdes the number of armature elements on the exopod of leg 1 is more than or the same as that of leg 2. The exopods of legs 1-4 of eaplçstçmẚdes bermudensẚs sp. nov. are armed with 3, 4, 3, and 3 armature elements, respectively, which is an unusual combination of armature elements that serves to characterize the new species. The maxillule of e. bermudensẚs sp. nov. is armed with 3 setae on the proximal segment and 5 setae on the distal segment. This maxillulary setation is shared only with e. brementẚ Chatton & Harant, 1924, but further comparison between e. brementẚ and the new species is unnecessary because of the different armature patterns in legs 1-4 of e. brementẚ (5, 4, 3, and 3 according to Ooishi (2008a)).
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 pages 136-138, DOI: 10.11646/zootaxa.4978.1.1, http://zenodo.org/record/4820443