Procampodelphys unipedatus 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
Procampodelphys
Procampodelphys unipedatus

description: Procampodelphys unipedatus gen. et sp. nov.
(Fig. 395)
Type material. Holotype ♀ (dissected and mounted on a slide, MNHN-IU-2014-21384) from Lissoclinum bilobatum Millar, 1955 (MNHN-IT-2008-4921 = MNHN A2/LIS/153), Port Elizabeth, South Africa, intertidal, Monniot coll., 01 February 1996.
Etymology. The specific name is derived from the Latin uni (=one) and pedat (=having feet), and refers to the presence of only one pair of legs.
Descriptionoffemale. Body (Fig. 395A) caterpillarlike, strongly curved ventrally, surface densely covered with fine setules: consistingof unsegmented prosome and small free urosome. Body length 2.45 mm; greatest width of prosome 545 μm across posterior part. Cephalosome (Fig. 395B) as long as wide, defined from metasomal region by weak constriction. Rostral region produced anteriorly. Freeurosome (Fig. 395C) short, 160 μmlong, consistingof genitalsomiteand 2 abdominal somites. Genital somite bearing copulatory pore on ventral surface. Caudal rami (Fig. 395C) fused with anal somite, as long as wide, ornamented with setules mainly distally; armed with 1 small, bifurcate seta distally.
Rostrum as prominence on frontal margin of cephalosome (Fig. 395B). Antennule (Fig. 395D) attenuated, about 120 μm long, unsegmented with several partial suture line along posterior side; densely covered with setules, setae small, similar in form to setules. Antenna (Fig. 395E) slender, 3-segmented; coxa and basis unarmed; unsegmented endopod 2.9 times longer than wide (58×20 μm); armed with 4 small setae (1 on proximal inner margin, 1 subdistal, and 2 distal) plus very small terminal claw, about 20% length of endopod.
Labrum (Fig. 395F) shortand broad, withrounded, setulose posterior margin. Mandible (Fig. 395G) consisting of coxa with extended gnathobase bearing pectinate medial margin and markedly convex distal margin, and biramous palp armed with 4 setae on exopod and 1 seta on basis; endopod only partially demarcated from basis, with 2 setae on first segment and 3 setae on second. Maxillule ((Fig. 395H) consisting of precoxa and unsegmented, lobate palp; with 3 setaeon medial margin of precoxal arthrite and 6 setae on palp; all setae broad and pinnate. Maxilla (Fig. 395I) 2-segmented; first segment with 2 setae; second segment subdivided by partial suture line, armed with 2 smaller medial and 2 larger distal setae; all setae pinnate. Maxilliped (Fig. 395J) lobate, bearing 5 subequal, naked setae distally.
Leg 1 (Fig. 395K) densely covered with setules, obscurely 2-segmented; first segment (protopod) with outerdistalseta; secondsegment bilobed, with 2 setae distally on longer outer lobe (exopod) and 1 seta distally on shorter inner lobe. Legs 2–5 absent.
Male. Unknown.
Remarks. The new species is distinguishable from its four congeneric species by its 2-segmented maxilla (3-segmented in congeners), by the possession of 5 setae on the maxilliped (6 or 7 setae in congeners), and by the absence of legs 2–4 (legs 2 and 3, at least, are present in congeners).
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 586-588, DOI: 10.11646/megataxa.4.1.1, http://zenodo.org/record/4591138