Contoura globosa Kim & Boxshall 2020, gen. et sp. nov.
Creators: name: Kim, Il-Hoi
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Copepoda
Cyclopoida
Notodelphyidae
Contoura
Contoura globosa

description: Contoura globosa gen. et sp. nov.
(Figs. 379, 380)
Typematerial. Holotype (intact ♀, MNHN-IU-2009-5056), paratypes (10 intact ♀♀, MNHN-IU-2014-21416), and dissected paratypes (2 ♀♀, figured) from Aplidium antillense (Gravier, 1955) (MNHN-IT-2008-170 = MNHN A1/ APL.B/166), St. François, S Grande Terre, Guadeloupe, Monniot coll., 25 December 1980.
Additional material. 12 ♀♀ (MNHN-IU-2018- 1911) from A. antillense, St. François, Guadeloupe.
Etymology. The specific name is derived from the Latin glob (=a ball), referring the spherical body of the adult female of the new species.
Descriptionoffemale. Body (Fig. 379A, B) swollen with almost spherical brood pouch; body length 3.03 mm in dissected specimen. Prosome obscurely divided by 4 constrictions or wrinkles demarcating cephalosome and metasome; cephalosome small, narrower than anterior pedigerous somites. Fourthpedigerous somite (brood pouch) extremely expanded, spherical, 2.02×1.89 mm. Urosome (Fig. 379C) rudimentary, very small, 2- segmented: first urosomite short, notarticulated from prosome, with traces of 2 or 3 suture lines on surface; second urosomite narrowing posteriorly. Caudal rami completely fused to anal somite, wider than long and narrowing distally, unarmed but ornamented with minute setules on surfaces.
Rostrum (Fig. 379D, E) large, 135×85 μm, tapering, bluntly tipped, with minute spinules on ventral surface. Antennule (Fig. 379F) 71×83 μm, shortand broad, leaf-like, with 3 partial sutures (or constrictions) along posterior surface, armed distally with 5 or 6 small setae, ornamented with minute spinules on all surfaces. Antenna (Fig. 379G) stout, 3-segmented; coxa very short; basis 66×54 μm, unarmed; unsegmentedendopod much narrowerthan proximal segments, 50×31 μm; armed with 1 smallseta distally plus small terminal claw.
Labrum (Fig. 379H) broad, bilobate at each posterolateral corner, outer posterolateral lobe fringed with fine spinules along distal margin; ornamented with patch of minute spinules in mid ventral surface. Mandible (Fig. 379I) with coxal gnathobase broadening out towards oblique medial margin; margin serrate, with protruded proximal, pectinate part: palp reduced and unsegmented, with small, outer knob (vestige of exopod) in middle, bearing 1 or 2 minute setae; distal half (endopodal region) narrowing, bearing 2 small subdistal setae on medial margin, 2 or 3 minute setae apically; with few small spinules on medial surface. Maxillule consisting of precoxa and palp: precoxa (Fig. 380A) with patch of minute setules proximally and bearing 3 strong, spiniform teeth on mediodistal arthrite: palp (Fig. 380B) distally bilobed; outer lobe (exopod) with 2 smallsetae apically and 3 small spinules subdistally; inner lobe (basis+endopod) broad, with 1 large seta subdistally on medial margin and 4 tubercles apically, 3 outer tubercles each tipped with 1 small seta. Maxilla (Fig. 380C) 4- segmented, consistingof syncoxa, basis, and 2-segmented endopod; syncoxawith 1 seta medially; basis drawn out to massive, curved claw bearing 1 seta proximally and 2 rows of denticles along distal part of convex proximal margin; endopod small, with broad seta on first segment and 1 broad and 2 small setae on second. Maxilliped (Fig. 380D) represented by small lobe tipped with 1 seta
Leg 1 (Fig. 380E) as broad plate bearing blunt outer distal lobe (exopod) and ornamented with minute spinules scatteredonventral surface.Leg 2 (Fig.380F) assmalllobe tipped with 3 minute, nipple-like processes (rudimentary setae) and ornamented with several minute spinules. Legs 3 and 4 absent. Leg 5 (Fig. 380G) represented by pair of conical, highly sclerotized processes.
Male. Unknown.
Remarks. The host of the new species, Aplidium antillense, is distributed in the western Atlantic from Georgia (United States of America) in the north to Brazil in the south (Sanamyan & Gleason, 2009; Da Rocha et al., 2012).
description: Published as part of Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), pp. 1-6 in Megataxa 4 (1) on pages 566-568, DOI: 10.11646/megataxa.4.1.1, http://zenodo.org/record/4591138