Cardiodectes shini, Uyeno, Daisuke, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3664.3.1 |
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publication LSID |
lsid:zoobank.org:pub:8B5606C6-5C88-49BF-A71F-ACEA8946D76F |
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DOI |
https://doi.org/10.5281/zenodo.6149026 |
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persistent identifier |
https://treatment.plazi.org/id/855487AD-FFFB-FFA1-FF7A-F1321B7DD1E2 |
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treatment provided by |
Plazi |
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scientific name |
Cardiodectes shini |
| status |
sp. nov. |
Cardiodectes shini n. sp.
( Figs 1 View FIGURE 1 C, D, 4–5)
Type material. Holotype: female (NSMT–Cr 22332), ex Pleurosicya micheli Fourmanoir ( Perciformes : Gobiidae ), Oura Bay (26°31’N, 128°4’E), Okinawa-jima Island, Ryukyu Islands, North Pacific Ocean, Japan, 33 m depth, 29 April 2012, reg. D. Uyeno and S. Nishihira. Paratypes: 3 females (NSMT–Cr 22333), ex Eviota sp., off Zatsun (26°49’N, 128°14’E), Okinawa-jima Island, Ryukyu Islands, East China Sea, Japan, 15 m depth, 27 June 2010, reg. D. Uyeno; 1 female (RUMF–ZC– 2391), ex P. m i c h e l i, Oura Bay (26°31’N, 128°4’E), Okinawa-jima Island, Ryukyu Islands, North Pacific Ocean, Japan, 31 m depth, 17 April 2012, reg. D. Uyeno and S. Nishihira; 1 female (NSMT–Cr 22334), ex P. micheli, Oura Bay (26°31’N, 128°4’E), Okinawa-jima Island, Ryukyu Islands, North Pacific Ocean, Japan, 30 m depth, 29 April 2012, reg. D. Uyeno and S. Nishihira; 2 female (NSMT–Cr 22335), ex Eviota sebreei Jordan & Seale ( Perciformes : Gobiidae ), Oura Bay (26°31’N, 128°4’E), Okinawa-jima Island, Ryukyu Islands, North Pacific Ocean, Japan, 28 m depth, 29 April 2012, reg. D. Uyeno and S. Nishihira; 1 female (RUMF–ZC– 2392), ex Priolepis sp. ( Perciformes : Gobiidae ), off Kyoda (26°32’N, 127°57’E), Nago Bay, Okinawa-jima Island, Ryukyu Islands, East China Sea, Japan, 33 m depth, 16 August 2012, reg. N. Shirakawa.
Description of postmetamorphic adult female. Body ( Fig. 4 View FIGURE 4 A, B) 2705 long, comprising cephalothorax, neck and trunk. Cephalothorax ( Fig. 4 View FIGURE 4 C, D, E) wider than long 725 × 917, bearing nodular and branching anterior processes on distal part of ventral surface and a pair of anterior digitiform lobes, as well as an expanded posterolateral pair of round lobes; anterior processes covering anterior half of cephalothorax ( Fig. 4 View FIGURE 4 A, B, C). Neck region ( Fig. 4 View FIGURE 4 C, D, E) narrow, bearing pair of lobes, and bending through 90o. Trunk ( Fig. 4 View FIGURE 4 A, B) less than twice as long as wide 1900 × 980, oval with greatest width at posterior ¾ and with convex posterior margin. Egg sac spiral ( Fig. 4 View FIGURE 4 A) uniseriate, originating at posterior lateral genital apertures.
Rostrum, antennules, and antennae situated closely on anterodorsal surface of cephalothorax ( Fig. 5 View FIGURE 5 A). Rostrum ( Fig. 5 View FIGURE 5 A) hemispherical, situated between bases of antennules. Antennule ( Fig. 5 View FIGURE 5 A, C) unsegmented, bearing 8 setae mainly on anterior margin; distal tip bearing 8 setae, 2 bifurcate setae, and 1 aesthetasc. Antenna ( Fig. 5 View FIGURE 5 A, D) 3-segmented, chelate, typical pennellid in form; proximal segment with highly sclerotized ridge on surface; middle segment bearing inner medial pointed projection; terminal claw with 1 small basal seta on posterior surface. Mouth tube, maxillule, and maxilla located on anterior part of ventral surface of cephalothorax ( Fig. 5 View FIGURE 5 B). Maxillule ( Fig. 5 View FIGURE 5 E) in form of bilobate knob, located lateral to base of mouth tube; each knob bearing 2 and 1 simple blunt processes. Maxilla ( Fig. 5 View FIGURE 5 B, F) 2-segmented; proximal segment with pointed anteromedial process; terminal segment indistinctly 2-segmented by constriction, covered with fine spinules at middle. Conspicuous bilobed process present between bases of maxillae ( Fig. 5 View FIGURE 5 B). Maxilliped absent.
Both legs 1 and 2 ( Fig. 5 View FIGURE 5 G, H) biramous, present centrally on cephalothorax ( Fig. 5 View FIGURE 5 D, E). Leg 3 ( Fig. 5 View FIGURE 5 I, J) uniramous, situated behind lobe on neck. Armature formula of all three legs as follows:
Leg 3 bearing protopod separated from intercoxal sclerite.
Variability of female morphology. The morphology of the female paratypes is as in the holotype. The measurements of the type series (n = 9) are as follows: body length 2038–2767 (2494 ± 253); cephalothorax length 495–840 (643 ± 98); cephalothorax width 616–957 (808 ± 115); trunk length 1462–1986 (1813 ± 199); trunk width 870–1250 (1050 ± 116).
Attachment site. The cephalothorax and neck region of the copepod were embedded in the host’s head musculature, while its trunk and egg sacs stick out into the water ( Fig. 1 View FIGURE 1 C, D).
Remarks. As C. bellwoodi n. sp., C. shini n. sp. is assigned to the ‘rubosus’ group because of the absence of a defined abdomen (see Izawa 1970; Bellwood 1981). Cardiodectes shini n. sp. differs from C. hardenbergi , C. krishnai , C. rotundicaudatus , and C. rubosus by having a trunk less than twice as long as wide (vs. more than twice as long as wide, Leigh-Sharpe 1934; Markevich 1936; Sebastian 1968; Izawa 1970; Bellwood 1981). Of the remaining five species, C. asper , C. bellwoodi n. sp, C. bertrandi , C. boxshalli , and C. spiralis , only C. asper shares the following characters with C. shini n. sp.: the neck region bends through 90o in the middle and bears a well-developed pair of lobes, and leg 3 is located on the posterior part of the base of the neck lobes (Bellwood 1981; Uyeno & Nagasawa 2010). These two species resemble each other, but C. shini n. sp. is distinguishable by the presence of the well-developed, bilobed process between the bases of the maxillae and by the cephalothorax bearing two pairs of lobes (vs. without the well-developed bilobed process and the cephalothorax with 3 pairs of lobes (see Uyeno & Nagasawa 2010)). In addition, legs 1 and 2 of C. shini n. sp. have protopods which are not separated from their intercoxal sclerites (vs. separated in C. asper (see Uyeno & Nagasawa 2010)).
Etymology. The specific name of the new species, shini , is after Shin “Snufkin” Nishihira, a President of Diving Team Snuck Snufkin, who is the best explorer of the Oura Bay, Okinawa-jima Island.
Newly established Japanese name for Cardiodectes shini n. sp. Shin-no-kanzashi.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.