Monnioticopa manadoensis, Kim & Boxshall, 2021

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 : 259-262

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.10530973
persistent identifier	https://treatment.plazi.org/id/3729879B-FEE7-FEF2-FA93-FD08D77C1F13
treatment provided by	Plazi
scientific name	Monnioticopa manadoensis
status	gen. et sp. nov.

Treatment

Monnioticopa manadoensis gen. et sp. nov.

( Figs. 171 View FIG , 172 View FIG )

Type material. Holotype ♀ (MNHN-IU-2014-21578, dissected and mounted on a slide) from budẚstçma ẚncrustatum Monniot F. & Monniot C., 1996 (MNHN-IT-2008-4103 = MNHN A3 About MNHN / EUD/76 ); N. Sulawesi, Indonesia, 13MI W of Murex Resort, W of Manado town OCDN 1283 -F, Site MANADO 6 (01°23.56’N, 124°32.62’E), depth 43 m, CRRF coll., 10 May 1993. GoogleMaps

Etymology. The type locality is the source of the name of the new species.

Description of female. Body ( Fig. 171A, B View FIG ) eruciform, with soft exoskeleton; body length 1.29 mm; maximum width 382 μm (across second pedigerous somite). Cephalosome short, slightly narrower than first pedigerous somite. Trunk obscurely segmented; first to fourth pedigerous somites defined from one another by lateral constrictions, bearing indistinct dorsal tergites. Genitoabdomen recurved dorsally, 4-segmented; anal somite ( Fig. 171C View FIG ) ornamented with 4 transverse rows of minute spinules on lateral surfaces; anal prominence distinct. Caudal rami ( Fig. 171C View FIG ) rectangular, broad, slightly longer than anal somite, about 1.8 times longer than wide (80×44 μm), or- namented with numerous, minute spinules; armed with 1 large naked seta (38 μm long) positioned at 66% of ramus length plus 3 granule-like vestigial setae subdistally on dorsal surface.

Rostrum ( Fig. 171D View FIG ) small, sub-rectangular, with rounded posterolateral corners. Antennule ( Fig. 171E View FIG ) small, 87 μm long, 3-segmented, articulation between second and third segments incomplete; armed with 4, 1, and 8 small setae on first to third segments, respectively. Antenna ( Fig. 172F View FIG ) about 70 μm long, digitiform, unarmed, 3-segmented with right angle curve between first and second segments; third segment longest, 33 μm long; second and third segments ornamented with scattered spinules.

Labrum semicircular, unarmed and unornamented. Mandible ( Fig. 171G View FIG ) represented by large, powerful claw. Maxillule ( Fig. 171H View FIG ) bilobed; larger inner lobe with 1 broad, spinulose seta apically; outer lobe shorter and narrower than inner, digitiform, tipped with 1 slender, naked seta. Maxilla ( Fig. 171I View FIG ) bilobate, with broad basal part; inner lobe (endite of syncoxa) twice as long as outer lobe, armed with 1 spinulose seta apically; outer lobe armed with 1 small seta at mid-length plus 2 unequal distal setae, both characteristically sigmoid in shape. Maxilliped absent.

Legs 1-4 each consisting of 2-segmented protopod and unsegmented rami ( Fig. 171J, K View FIG ); basis with small outer seta. Exopods much smaller than endopods, tipped with 1 small claw and 1 small, circular lamella; exopod of leg 3 armed additionally with 1 large spine on lateral margin ( Fig. 171K View FIG ). Endopods 59×29, 86×36, 91×38, and 89×38 μm, respectively, in legs 1-4. Lengths of laterodistal and mediodistal setae on endopods 97 and 83, 105 and 89, 108 and 86, and 109 and 85 μm, respectively, in legs 1-4.

Leg 5 ( Fig. 171L View FIG ) lamellate, nearly circular, as long as wide (172×176 μm), with 2 small setae; distance be- tween setae 118 μm.

Copepodid juvenile. Body ( Fig. 172A View FIG ) curved dorsally, consisting of cephalosome, 4-segmented trunk, and indistinctly 3-segmented genitoabdomen. First to fourth pedigerous somites each with faint tergite; fifth pedigerous somite not differentiated. Anal somite ornamented as in adult female. Caudal ramus 2.20 times longer than wide, armed as in adult female.

Rostrum ( Fig. 172B View FIG ) semicircular. Antennule 2-segmented, armed with 4 setae on proximal segment and 11 setae on distal segment. Antenna 3-segmented, curved as in adult female, but not ornamented. Labrum ( Fig. 172B View FIG ) semicircular, smooth. Mandible, maxillule, and maxilla as for adult female. Maxilliped absent.

Legs 1-4 biramous with 2-segmented protopods; basis bearing 1 small seta on outer margin. Leg 1 ( Fig. 172C View FIG ) exopod 2-segmented; proximal segment of exopod with projecting laterodistal corner bearing pointed distal process and 1 thick spine; distal segment inserted into medial margin of proximal segment, armed with 2 thick spines distally (medial spine twice as long as lateral); endopodal segment 1.7 times longer than wide, 2 distal setae shorter than segment. Leg 2 same as leg 1. Leg 3 ( Fig. 172D View FIG ) exopod 2-segmented; proximal segment of exopod armed with large spine at laterodistal corner; distal segment armed as in legs 1 and 2, but longer; endopodal segment twice as long as wide, armed as in legs 1 and 2. Leg 4 ( Fig. 172E View FIG ) exopod unsegmented, armed with 3 small spines, 1 on lateral margin, 1 subdistal, and 1 distal; distal setae on endopodal segment short, less than half length of segment. Leg 5 not differentiated.

Male. Unknown.

Remarks. Mçnnẚçtẚcçpa manadçensẚs gen. et sp. nov. is distinguishable from its congeners by the possession of the 2 specialized (sigmoid in shape) setae located distally on the outer lobe of the maxilla. In addition, in M. manadçensẚs gen. et sp. nov. the first segment of the antennule is armed with 4 setae and the third segment of the antenna is the longest segment. These features of the antennule and antenna are shared only with M. fẚrma gen. et sp. nov. However, these two species are easy to separate because in M. fẚrma gen. et sp. nov. the antenna is straight, the first to fourth pedigerous somites each bear a well-developed dorsal tergite, the inner lobe of the maxillule is unarmed, and the coxae of legs 1-4 each bear a large mediodistal projection.