Enterocola parapterophorus Marchenkov & Boxshall, 2005

Kim, Il-Hoi & Boxshall, Geoff A., 2021, Copepods (Cyclopoida) associated with ascidian hosts: Ascidicolidae, Buproridae, Botryllophilidae, and Enteropsidae, with descriptions of 84 new species, Zootaxa 1, pp. 1-286 : 203

publication ID	https://doi.org/ 10.11646/zootaxa.4978.1.1
publication LSID	lsid:zoobank.org:pub:9C7C1723-73EB-4FBE-A47A-54627DEB8F93
DOI	https://doi.org/10.5281/zenodo.10530950
persistent identifier	https://treatment.plazi.org/id/3729879B-FF2F-FF3D-FA93-FF10D6241BCF
treatment provided by	Plazi
scientific name	Enterocola parapterophorus Marchenkov & Boxshall, 2005
status

Treatment

( Figs. 129 View FIG , 130 View FIG )

Material examined. 3 ♀♀ (MNHN-IU-2014-21543, 1 ♀ dissected) from aẚdemnum sp. (MNHN-IT-2008-3357 = MNHN A2 View Materials /DID.C/322); Suez, Ph. Dollfus coll., 22 December 1928 .

Supplementary description of female. Body ( Fig. 129 View FIG A-C) stout, curved dorsally; body length 873 μm; maxi- mum width 364 μm (across second pedigerous somite). Cephalic shield 164×247 μm, distinctly narrower than trunk, with obscure posterior margin. Trunk unsegmented, but 5 pedigerous somites defined by constrictions; dorsolateral tergal folds absent on first pedigerous somite, but present on second to fourth pedigerous somites. First to fourth pedigerous somites each with single mid-ventral interpodal protrusion between left and right legs, small in first pedigerous somite, but broad in others ( Fig. 129C View FIG ). Genitoabdomen dorsally unsegmented but ventrally 4-segmented. Caudal ramus ( Fig. 129D View FIG ) unarmed, 2.47 times longer than wide (74×30 μm), slightly narrowing distally, with rounded distal margin.

Rostrum absent. Antennule ( Fig. 129E View FIG ) 1.5 times longer than wide (53×35 μm), widest in middle, with pro- truding posterior margin; armed with 3 small setae distally (setae almost equal, about 9 μm long, but anteriormost thicker than other 2). Antenna ( Fig. 129F View FIG ) 136×64 μm, unsegmented, but with weak wrinkle in middle of lateral side, armed with 5 setae (3 mediodistal and 2 laterodistal), and ornamented with fine spinules just proximal to transverse wrinkle; lengths of setae I-V (medial to lateral) 18, 18, 23, 24, and 28 μm, respectively.

Labrum ( Fig. 129G View FIG ) circular, ornamented with scattered minute spinules on ventral surface; palps slender proximally, moderately expanded distally, covered with stiff, long setules (or setule-like spinules). Mandible narrower than labral palp, gradually narrowing distally. Maxillule consisting of precoxa ( Fig. 129H View FIG ) and palp ( Fig. 129I View FIG ); sclerotized distal part of precoxa bifurcate distally, with 1 tubercle proximally, 1 patch of minute spinules subdistally; endite of precoxa tipped with 1 spinulose seta and more than 10 stiff setules; palp with 6 spinulose, spiniform setae (1 on lateral margin, 3 on distal margin, and 2 near mediodistal corner). Maxilla ( Fig. 129J View FIG ) 2-segmented; proximal segment with large, tapering mediodistal process covered with spinules distally; distal segment bluntly tipped, with 1 setulose spine subdistally and 1 small seta proximally. Maxilliped absent.

Legs 1-4 ( Fig. 130 View FIG A-D) each consisting of 2-segmented protopod and unsegmented rami; protopods unarmed. Exopods bearing patch of minute spinules at proximal part of lateral margin. Exopods of legs 1, 2, and 4 tipped with small cusp and with 1 minute spinule subdistally on lateral margin. Endopods 54×28, 53×26, 49×30, and 36×25 μm, respectively, in legs 1-4. Endopods of legs 3 and 4 with distinctly convex lateral margin. Distal setae on endopods distinctly shorter than the endopodal segments. Lengths of laterodistal and mediodistal setae 27 and 19, 24 and 20, 29 and 17, and 25 and 18 μm, respectively, in legs 1-4.

Leg 5 ( Fig. 129K View FIG ) lamelliform, unarmed, obliquely wider than long (113×209 μm).

Male. Unknown.

Remarks. This species was described as an associate of the ascidian aẚdemnum granulatum Tokioka, 1954 from Djibouti coast of the Red Sea. In the original description of this species Marchenkov & Boxshall (2005) described or illustrated that (1) the second to fourth pedigerous somites have well-developed dorsolateral tergal folds, (2) the caudal rami are about 2.5 times longer than wide, (3) the antennule is armed with 3 or 4 setae distally, (4) the antenna is armed with 5 setae, (5) the distal setae on the endopods of the swimming legs are distinctly shorter than endopodal segments, and (6) the laterodistal seta on the endopods of the swimming legs is distinctly longer than the mediodistal seta. Our specimens from Suez exhibit the above diagnostic features and there are no significant differences from the original description.