Periclimenes bowmani Chace, 1972

Fransen, Charles H. J. M., 2023, The marine palaemonid shrimps (Crustacea, Deapoda, Caridea) of the Dutch Caribbean, Zootaxa 5387 (1), pp. 1-127 : 63-66

Periclimenes bowmani Chace, 1972

(figs. 39–41)

Periclimenes crinoidalis — Horká et al. 2016: supplementary table 1 ( Curaçao), not Periclimenes crinoidalis Chace, 1969 .

Material examined. Curaçao: RMNH. CRUS.D.57056: 1 ovigerous female, pocl. 2.5 mm , R =8/4; 1 male, pocl. 1.8 mm , R =7/3; stn COA. 04, Blauwbaai , 12°08′05.70″N 68°59′03.50″W, 02.xi.2013, depth 10 m, on Davidaster rubiginosus (Pourtalès, 1869) (photo COA.04 054), collected by B . T. Reijnen (photo B. T. Reijnen 020–032) . RMNH. CRUS.D.58170: 1 specimen, pocl. 1.8 mm , R =8/3; stn CUR.03, south coast, Hilton Reef , 12°07′19.5″N 068°58′07.8″W, 27.iv.2005, depth 7.1 m, scuba diving, on Nemaster grandis A.H. Clark, 1909 , collected by N. Snijders (fcn. g025) .

Remarks. The morphological characters of the present specimens agree well with the original description by Chace (1972). Rostrum ( Fig. 39A–C ) straight, slightly directed downward, reaching midlength of distal segment of antennular peduncle; dorsal lamina not developed, with 8 dorsal teeth at equal distances, proximal tooth postorbital; ventral lamina slightly concave with 3 small teeth distally. Hepatic tooth ( Fig. 39C ) slightly below level of antennular tooth, directed obliquely downward. Third abdominal segment ( Fig. 39D ) not posteriorly produced. Telson ( Fig. 39E ) with 2 pairs of small dorsal spines at about 0.5 and 0.75 of telson length; lateral distal pair slightly more robust than dorsal spines; posterior margin of telson ( Fig. 39F ) with small triangular process; this process was not figured nor mentioned by Chace (1972). Basal segment of antennular peduncle ( Fig. 39A ) with distolateral tooth and additional 2 teeth on anterior margin (3 in holotype ( Chace 1972)). Maxilla with endite bilobed. Ischiomerus of third maxilliped without distomedial mobile spine. Second pereiopods slightly dissimilar and unequal; fingers unarmed, movable finger without dorsal carina; fixed finger much broader than movable finger, typically with fringe of setae ventrally. Ambulatory pereiopods with propodus ( Fig. 40A ) curved with flexor margin concave, finely crenulate with short mobile spinules. Dactylus of third pereiopod ( Fig. 40B ) with concave flexor margin with series of small denticles, denser and increasing in size towards unguis; dorsal margin of corpus with scale like ornamentation at joint with unguis; unguis slender, about half length of corpus.

Colour ( Fig. 41 ). Largely translucent with orange markings on eyestalks, antennulae and posterior part of abdomen and tailfan.

Ecology. The species has been recorded in association with the crinoids D. rubiginosus by Chace (1972) and Criales (1984), and Tropiometra carinata (Lamarck, 1816) by Chace (1972). The species is here recorded for the first time from the crinoid N. grandis .

Distribution. Known from very few locations in the tropical western Atlantic: Saint Lucia ( Chace, 1972); Santa Marta, Colombia ( Criales 1984); Islas del Rosario, Columbia ( Corredor et al., 1979); and Martinique and Guadeloupe ( Poupin, 2018); in depths between 2 and 53 m. Recorded from Curaçao by Horká et al. (2016) as P. crinoidalis .

Figures

FIGURE 39. Periclimenes bowmani Chace, 1972, RMNH.CRUS.D.58170, female, pocl. 1.8 mm. A, carapace and anterior appenages, lateral view; B, idem, dorsal view; C, rostrum lateral view; D, abdomen, lateral view; E, telson; F, idem, tip. Scale bars: A, B, D=2.0 mm; C=1.0 mm; E=0.5 mm; F=0.125 mm.

FIGURE 40. Periclimenes bowmani Chace, 1972, RMNH.CRUS.D.58170 (fcn. CUR.03), female, pocl. 1.8 mm.A, third right pereiopod; B, idem, dactylus and distal part propodus. Scale bar: A=0.5 mm; B=0.125 mm.

FIGURE 41. Periclimenes bowmani Chace, 1972, RMNH.CRUS.D.57056, stn COA.04, Curaçao, Blauwbaai, 12°08′05.70″N 68°59′03.50″W, 2.xi.2013, depth 10 m, on Davidaster rubiginosus (Pourtalès, 1869). (Photograph by B.T. Reijnen.)