Notodelphys aurantiaca Stock 1970
Creators: name: Kim, Il-Hoi
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Copepoda
Cyclopoida
Notodelphyidae
Notodelphys
Notodelphys aurantiaca

description: Notodelphys aurantiaca Stock, 1970
(Figs. 10, 11)
Material examined. 2 ♀♀, 2 ♂♂ (MNHN-IU-2018- 1761) and 1 dissected ♀ from Ascidia curvata (Traustedt, 1882), Guadeloupe, No. 18; 1 ♀ (MNHN-IU-2018-1762) and 1 dissected ♀ (figured) from A. curvata, Riviere salee, Guadeloupe, February 1985.
Supplementary description of female. Body (Fig. 10A) 4.56 mm long. Cephalosome widerthan long. Fifth pedigerous somite completely incorporated into brood pouch. Freeurosome (Fig. 10B) 5-segmented: genital somite 175× 320 μm, shorter than 4 free abdominal somites 233×313, 240×302, 233×265, and 225×233 μm, respectively, each wider than long. Anal somite ornamented with fine spinules on posteroventral margin and few setules near posterolateral corner. Caudal ramus (Fig. 10C) gradually narrowing distally, denselysetulose on both inner and outer margins; outer lateral seta located subdistally at 78% of ramus length. Rostrum (Fig. 10D) elongate, 184×100 μm, with truncated apex. Antennule 505 μm long, 10-segmented (Fig. 10E), segmental fusion pattern as follows: I-II, III-V, VI-XI, XII-XIV, XV-XVI, XVII-XX, XXI-XXIII, XXIV, XXV, XXVI-XXVIII; armatureformula 3, 5, 12, 6, 4+aesthetasc, 7, 3+aesthetasc, 2, 2+aesthetasc, and 7+aesthetasc; setae on proximal segments mostly pinnate (as figured). Antenna (Fig. 10F) rather stout with short unarmed coxa; basis with 2 equally large pinnate setae representing exopod; first endopodal segment with 1 subdistal seta on inner margin; compound distal endopodal segment 133×44 μm, 3.2 times as long as wide, with 9 setae (arranged as 1, 1, 3, 1, and 3) plus strong terminal claw; 3 distal setae on second endopodal segment naked and blunt at tip.
Labrum (Fig. 10G) with denticles on middle of posterior margin and setules on produced posterolateral corners. Mandible (Fig. 10H) with 4 teeth on coxal gnathobase; basis with 1 setaon inner margin; exopod with 5 setae, distal seta much larger than others; endopod with 4 setae on first segment and 9 setae on second. Maxillule (Fig. 10I) with 10 setae on precoxal arthrite, 1 seta on coxal endite, 2 unequal setae on coxal epipodite; basis with 1 short proximal and 2 longer distal setae on inner margin; exopod indistinctly 2-segmented, with 4 setaeon distal segment; endopod distinctly 2-segmented, with 1 seta on proximal segment and 4 setae on distal segment, outermost seta markedly shorter than other 3. Maxilla (Fig. 10J) consistingof syncoxa, basis, and 3-segmented endopod; syncoxa with 4, 1, 2, and 3 setae on first to fourth endites, respectively; basis carrying strong claw with fine spinulesalongconcavemargin, plus 2 setae; endopodwith 1, 1, and 4 setae on first to third segments, respectively, one of setae on thirdsegment minute. Maxilliped (Fig. 11A) 3-segmented; armatureformula 9, 1, and 3.
Legs 1–4 with 3-segmented rami. Leg 1 (Fig. 11B) with straight inner distal spine on basis; first endopodal segment about 1.5 times as long as wide, longer than distal 2 segments combined. Leg 2 (Fig. 11C) identical to leg 3 in armature formula. Leg 4 (Fig. 10D) with inner spine (rather than seta) on coxa; inner seta on first exopodal segment small, as long as outer seta on same segment. Armature formula for legs 1–4 as follows:
CoxaBasisExopodEndopodLeg 10-11-II-0; I-1; III, 50-1; 0-1; 1, 2, 3Legs 2 & 30-130-11-01-1; 1-1; 3, 1, 50-1; 0-1; 1, 2, 3Leg 40-I1-01-1; 101; 2, 1, 50-1; 0-1; 1, 2, 2
Leg 5 (Fig. 11E) small, located on posteroventral surfaceof brood pouch, consisting of incorporated protopod and free exopod. Protopod with 1 seta tipped on elongate lateral process. Exopodal segment 19×23 μm, wider than long, about half as long as lateral process of protopod, and armed with 1 naked seta and 1 rudimentary seta. Leg 6 absent.
Remarks. Our specimens from Guadeloupe are identified as N. aurantiaca because the first endopodal segment of leg 1 is elongated, about 1.5 times longer than wide, the lateral process of the protopod of leg 5 is elongate (distinctly longerthan wide), and the exopod of leg 5 is sub-rectangular. These distinctive character states are all typical of N. aurantiaca. Stock’s (1970) material was collected from Ascidia interrupta Heller, 1878 at Curaçao in the Caribbean Sea.
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 23-26, DOI: 10.11646/megataxa.4.1.1, http://zenodo.org/record/4591138