Cancricepon castroi, An & Wang & Boyko & Williams, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4559.1.5 |
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publication LSID |
lsid:zoobank.org:pub:E513CBD3-9EFC-4D3F-AD83-184D0575A2B1 |
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DOI |
https://doi.org/10.5281/zenodo.5932419 |
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persistent identifier |
https://treatment.plazi.org/id/03B2B90D-995B-D712-98D0-955ACE39A9A4 |
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treatment provided by |
Plazi |
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scientific name |
Cancricepon castroi |
| status |
sp. nov. |
Cancricepon castroi View in CoL n. sp.
( Figs 2 View FIGURE 2 , 3 View FIGURE 3 )
urn:lsid:zoobank.org:act:66A94A51-8CFC-4479-985D-9DCE9C1D02B1
Material examined. Infesting female Trapezia septata Dana, 1852 (11 mm CW, 9 mm CL) (UF 22339); mature dextral holotype female (4.5 mm), mature allotype male (1.3 mm, prepared for SEM) (UF 42206), Australia, Western Australia, Ningaloo Reef, Wreck Zirv, reef front, 22°36’30”S, 113°37’30”E, in Pocillopora sp., 10 m, May 2009, coll. J. Cale, L. Plaisance.
Infesting female Trapezia lutea Castro, 1997 (8.4 mm CW, 5.9 mm CL) (UF 39611); mature sinistral paratype female (3.7 mm), mature paratype male (1.6 mm) (UF 42207), Maldives, 0.3 km south of Magoodhoo Island, 10– 30 m forereef, in Pocillopora sp., 03°04’29”N, 72°57’59”E, 10 May 2014, coll. J. Moore.
Infesting male T. lutea (15.7 mm CW, 12.3 mm CL) (UF 27019); mature sinistral paratype female (7.2 mm), mature paratype male (1.9 mm) (UF 42208), Japan, Okinawa Prefecture, Okinawa Island, White Beach, 1–14 m, 26°17’44”N, 127°54’22”E, 17 July 2010, coll. N. Evans, F. Michonneau, G. Paulay, T. Naruse, Y. Ise.
Infesting male Quadrella coronata Dana, 1852 (6.9 mm CW, 5.4 mm CL) (UF 4821); juvenile non-type female (3.2 mm), 2 non-type cryptoniscus larvae (1.4 mm each) (UF 42209), Papua New Guinea, 02°22’06”S, 146°17’19”E, 29 June 2003, coll. L. Kirkendale.
Description. Female length 3.7 mm excluding uropods; maximum width (across pereomere 3) 3.7 mm; head length 1.1 mm, width 1.2 mm; length of uropods 1.1 mm (measurements based on holotype). All segments distinct; no pigmentation ( Fig. 2A, B View FIGURE 2 ).
Head ovate, frontal lamina prominent, extending beyond both sides of head and frontal margin, notched medially ( Fig. 2A, B View FIGURE 2 ); eyes lacking. Antennules and antennae of three and five articles each, respectively, terminally setose; all articles with scales ( Fig. 2C View FIGURE 2 ). Barbula with 2 falcate pointed lateral projections on each side, outer projections larger than inner; median region with a pair of blunt triangular projections ( Fig. 2D View FIGURE 2 ). Maxilliped with rounded anterior segment and large tapered palp, inner margin fringed with setae, plectron triangular, short and blunt ( Fig. 2E View FIGURE 2 ).
Pereon broadest across pereomere 3 ( Fig 2A, B View FIGURE 2 ). Coxal plates developed in first 4 pereomeres. Large tergal projections present on pereomeres 2–4, with projections on longer side of body larger than those on shorter side. Last three pereomeres with pointed mid-dorsal projections ( Fig 2A, B View FIGURE 2 ). Brood pouch completely covered by oostegites, highly vaulted. Oostegite 1 ( Fig. 2F, G View FIGURE 2 ) with two segments subequal in length, anterior segment ovate; internal ridge notched near lateral margin, with small tubercle; posterior margin fringed with setae, round posterolateral point extended laterally. Pereopods 1 ( Fig. 2H View FIGURE 2 ) and 5–7 all small, with blunt dactyli, pereopods 2–4 large, with sharp dactyli ( Fig. 2I View FIGURE 2 ). All pereopods with stout bases.
Pleon of six segments, first five pleomeres with 5 pairs of biramous pleopods and uniramous lateral plates. All pleopods and lateral plates with digitate margins, surfaces covered with tubercles ( Fig. 2J View FIGURE 2 ). Uropods uniramous, similar to pleopods ( Fig. 2A, B, J View FIGURE 2 ).
Allotype male length 1.8 mm; maximum width (across pereomeres 4–6) approximately 0.7 mm; head broader than long, length 0.2 mm, width 0.3 mm. All body regions and segments distinct ( Fig. 3A, B View FIGURE 3 ).
Head elliptical, with rounded anterior margin; small, dark eyes near posterolateral corners ( Fig 3A View FIGURE 3 ). Antennules with three articles each, distal margin of all articles with setae ( Fig. 3C View FIGURE 3 ). Antennae with five articles each, second through fourth articles with single seta, distal segment with many setae ( Fig. 3C View FIGURE 3 ).
Pereon with seven segments. Pereomeres 4–6 subequal in width, small patches of pigmentation present on some pereomeres and first pleomere ( Fig. 3A View FIGURE 3 ). All pereomeres with rounded mid-ventral tubercles ( Fig. 3B View FIGURE 3 ). First three pereopods larger than posterior four; dactyli of first three pereopods much larger than others ( Fig. 3 View FIGURE 3 D–F), propodi, carpi and meri with ridged pad-like scales and tufts of setae on ventral surfaces ( Fig. 3 View FIGURE 3 D–F).
Pleon with six pleomeres, lateral margins rounded ( Fig. 3A, B View FIGURE 3 ). First five pleomeres with uniramous lateral digitiform pleopods, tips tapered, acute with terminal seta ( Fig. 3G View FIGURE 3 ), first pleomere with midventral tubercle ( Fig. 3B View FIGURE 3 ). Sixth pleomere (pleotelson) without uropods or posterolateral lobes, anal cone visible in ventral view ( Fig. 3B View FIGURE 3 ).
Etymology. This species is named after Dr. Peter Castro (Professor Emeritus, California State Polytechnic University, Pomona) in honor of his contributions to trapeziid taxonomy.
Remarks. This new species can be distinguished from its closest relative, C. savignyi , by several characters of the female: all pereomeres with asymmetrical dorsolateral bosses (at least those on pereomere 2 symmetrical in C. savignyi ), maxilliped palp elongate and tapered (maxilliped palp stout and rounded at tip in C. savignyi ), endopods of pleopods less than 1/3 as large as exopods (endopods of pleopods 1/3 to 1/2 as long as exopods in C. savignyi ). Additional differences between C. castroi n. sp. and other species of Cancricepon are given in the key to species below. Differences between the males of the two species are difficult to determine, as the sole male described by Stebbing (1910) had unusual pleopod structures and may not have been fully mature.
No bopyrids were previously known from either Trapezia septata or T. lutea . No species of Quadrella Dana, 1851 , has ever previously been reported to bear bopyrids, although Q. coronata is the type host for Sacculina pilosella Van Kampen & Boschma, 1925 ( Cirripedia : Rhizocephala ) ( Van Kampen & Boschma 1925). Australia, the Maldives, and Papua New Guinea are new localities for species of Cancricepon .
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.