Creopelates floridus Shiino, 1958

Uyeno, Daisuke, 2015, Systematic revision of the pennellid genus Creopelates Shiino, 1958 (Copepoda: Siphonostomatoida) and the proposal of a new genus, Zootaxa 3904 (3), pp. 359-386 : 361

publication ID	https://doi.org/ 10.11646/zootaxa.3904.3.3
publication LSID	lsid:zoobank.org:pub:637EF6A8-E69B-412F-8405-C229581FB8EB
DOI	https://doi.org/10.5281/zenodo.6098529
persistent identifier	https://treatment.plazi.org/id/3F30807F-FFDE-FFEA-A3D9-FF10B0EDF823
treatment provided by	Plazi
scientific name	Creopelates floridus Shiino, 1958
status

Treatment

Japanese name: Uo-no-wakizashi for both the genus and the species ( Figs 1 View FIGURE 1 A, 2–3)

Creopelates floridus: Shiino, 1958 , p. 92–96

Type material. Holotype: postmetamorphic adult female (NSMT-Cr R 1225a) (dissected), ex Plectranthias sagamiensis (Katayama) ( Perciformes : Serranidae ), Kannonzukadashi, Amadaiba, Hayama, Sagami Bay, Kanagawa, North Pacific Ocean, Japan, 65 m depth, 17 January, 1957. Paratypes: 2 postmetamorphic adult females (NSMT-Cr R 1225b) (dissected), collection data same as those of holotype.

Additional material. 1 postmetamorphic adult female (NSMT-Cr R 1686), ex P. sagamiensis, Kannonzuka, Amadaiba, Hayama, Sagami Bay , North Pacific Ocean, Japan, 75 m depth, 20 January, 1960; 2 postmetamorphic adult females (NSMT-Cr R 1260), ex P. sagamiensis , Kannonzuka-dashi, Amadaiba, Hayama, Sagami Bay, North Pacific Ocean, Japan, 62–72 m depth, 13 March, 1957.

Redescription of holotype and paratype female. Body ( Fig. 2 View FIGURE 2 A) 11.56–14.68 (13.31 ± 1.60) long (n = 3), comprising cephalothorax, neck region and trunk; junction of neck and trunk curved. Cephalothorax ( Fig. 2 View FIGURE 2 A–C) wider than long 0.79–1.09 (0.93 ± 0.15) × 1.17–1.43 (1.27 ± 0.14), bearing paired antennary processes with multiple, irregular accessory processes, and paired posterolateral lobes expanded posteriorly with digitate processes; rostrum ( Fig. 2 View FIGURE 2 D) convex with blunt tip. Neck region ( Fig. 2 View FIGURE 2 A) narrow, bearing paired small digitate lobes anteriorly ( Fig. 2 View FIGURE 2 A–C) and fringed with series of finely digitate lobes, arranged in about ten pairs ( Fig. 2 View FIGURE 2 A); second and third pedigers clearly segmented. Trunk ( Fig. 2 View FIGURE 2 A, E) pyriform, longer than wide 3.90–4.45 (4.25 ± 0.31) × 1.54–2.17 (1.77 ± 0.35), with anterior end narrowing towards neck region, with slightly protruding posterolateral corners ( Fig. 2 View FIGURE 2 E). Abdomen located between paired oviducal pores ( Fig. 2 View FIGURE 2 A, E, F). Egg-sacs uniseriate, spirally coiled, or single plane ( Fig. 2 View FIGURE 2 A).

Antennule ( Fig. 2 View FIGURE 2 G) unsegmented, bearing 19 setae along anterior margin: distal tip with 9 setae distally, 2 of which share common base, and 1 aesthetasc. Antenna ( Fig. 3 View FIGURE 3 A) 3-segmented, chelate, typical pennellid; proximal segment bearing distal pointed process on posterior surface; middle segment bearing two pointed protrusions along inner medial margin, terminal segment claw like with small basal element on posterior surface. Mouth tube, maxillule, and maxilla located near base of antenna on anterior part of ventral surface of cephalothorax. Maxillule ( Fig. 3 View FIGURE 3 B) comprising element with flanged distal part and one accessory seta and lobe with two distal setae. Maxilla ( Fig. 3 View FIGURE 3 C) 2-segmented; proximal segment bearing single subterminal pointed process; terminal segment incompletely 2-segmented, with rounded distal part bearing spatulate fringe covered with small spinules. Maxilliped absent.

Legs 1 and 2 ( Fig. 3 View FIGURE 3 D, E) biramous, situated on posterior part of cephalothorax to second pediger ( Fig. 2 View FIGURE 2 C). Legs 3 and 4 ( Fig. 3 View FIGURE 3 F–H) uniramous, situated on third pediger and distal part of neck, respectively. Legs 4 separated by gap from preceding legs. Armature formula of legs 1-4 as follows:

Protopod Exopod Endopod Leg 1 1–1 1–1; 7 0–1; 7 Leg 2 1–0 1–1; 7 0–1; 7 Leg 3 1–0 0–0; 6 Absent Leg 4 1–0 0–0; 5 Absent Protopods of legs 3 and 4 separated from respective intercoxal sclerites by long gaps ( Fig. 3 View FIGURE 3 F, G). Attachment site. The cephalothorax and neck of the copepod were embedded in the musculature of the host’s trunk behind the base of the pectoral fin and attached to the host’s vertebrae, while its trunk and egg sacs remained outside the fish’s body wall ( Fig. 1 View FIGURE 1 A).

Variability. The morphology of the non-type material is as in the type series. The measurements of the paratype (n = 1) are as follows: body length 13.51 mm; cephalothorax length 0.96; trunk length 4.41; trunk width 1.31. Remarks. This copepod is the type species of the genus Creopelates . Creopelates floridus Shiino, 1958 was described based on three females obtained from Zalanthias kelloggi ( Jordan & Evermann) (= Z. azumanus ) ( Perciformes : Serranidae ) collected in Sagami Bay, Japan ( Shiino 1958). However, from the re-examination of the type host specimens of the types deposited together with the copepods in NSMT, it was revealed that they are actually Plectranthias sagamiensis (Katayama) ( Perciformes : Serranidae ).