The marine palaemonid shrimps (Crustacea, Deapoda, Caridea) of the Dutch Caribbean Author Fransen, Charles H. J. M. text Zootaxa 2023 2023-12-15 5387 1 1 127 https://mapress.com/zt/article/download/zootaxa.5387.1.1/52482 journal article 10.11646/zootaxa.5387.1.1 1175-5334 10698994 0AD29F74-D349-4E12-8CA4-310275A847B3 Periclimenaeus ascidiarum Holthuis, 1951b ( Figs. 10–15 , video 6) Material examined . Bonaire : Stn BON.10, Salt Pier, 12°05.006′N 068°16.912′W , 26.x.2019 , depth 7 m , in compound ascidian, Diplosoma sp. , not collected, photo C.H.J.M. Fransen. RMNH . CRUS .D.57887: 1 ovigerous female, pocl. 2.3 mm ; stn BON.18, Red Slave, 12°01.605′N , 068°15.079′W , 28.x.2019 , depth 8 m , in greyish compound ascidian under stone, Diplosoma sp. , collected by C.H.J.M. Fransen (fcn. BON .18-5) (video 6). RMNH . CRUS .D.58128: 1 male , pocl. 1.2 mm ; 1 female , pocl. 1.3 mm , all R =3/0; stn BON.27, Red Slave, 12°01.592′N 068°15.063′W , 03.xi.2019 , depth 1 m , snorkeling, in greyish compound ascidian under stone, Diplosoma sp. , collected by W. de Gier. RMNH . CRUS .D.57909: 1 ovigerous female, pocl. 1.7 mm , R =3/0; stn BON.37, Andrea I, 12°11.285′N 068°17.795′W , 06.xi.2019 , depth unknown, scuba diving, in greyish compound ascidian under stone, Diplosoma sp. , collected by C.H.J.M. Fransen (fcn. BON .34-4). Comparative material . RMNH . CRUS .D.51396, 1 ovigerous female, pocl. 1.4 mm ; USA, SE Florida, N coast of Miami, 1976, collected by R . Guest. FIGURE 14 . Periclimenaeus ascidiarum Holthuis, 1951b , RMNH.CRUS.D.57909, ovigerous female, pocl. 1.7 mm.A, rostrum; B, right third pereiopod, mesial view; C, idem, dactylus and distal part propodus; D, right fourth pereiopod; E, idem, dactylus and distal part propodus; F, right fifth pereiopod; G, idem, dactylus and distal part propodus. Scale: A=1.0 mm; B, D, F=1.25 mm; C, E, G=0.125 mm. FIGURE 15 . Periclimenaeus ascidiarum Holthuis, 1951b . A, B, stn BON.10, Bonaire, Salt Pier, 12°05,006′N 068°16,912′W, 26.x.2019, depth 7 m, in compound ascidian, Diplosoma sp. ; C, RMNH.CRUS.D.57887, ovigerous female, stn BON.18, Red Slave, 12°01.605′N, 068°15.079′W, 28.x.2019, depth 8 m, from greyish compound ascidian, Diplosoma sp. under stone. A, habitus removed from host; B, idem, near host; C, ovigerous female, dorsal view, major second cheliped missing. (Photographs by C.H.J.M. Fransen.) Remarks . The morphological characters of the present specimens agree very well with the original description of Holthuis (1951b) and diagnosis in Ferreira et al . (2020) . Rostrum with three dorsal teeth, without ventral teeth, distally upturned, overreaching cornea and basal segment of antennular peduncle (figs. 10A–C, 14A). Carapace without supraorbital tooth or tubercle; antennal tooth robust. Inferior orbital angle strongly produced ( Fig. 10B ). Pterygostomial angle produced ( Fig. 10A ). Scaphocerite short, reaching distal margin of penultimate segment of antennular peduncle; distolateral tooth distinct but not overreaching distal margin of lamina ( Fig. 10B ). Carpocerite distinctly overreaching distal margin of scaphocerite ( Fig. 10B , 11A ). Second pereiopods unequal in size and shape, without tubercles (figs. 11B, D). Major second chela ( Fig. 11B, C ) distal cutting edge of dacylus finely denticulate; distal cutting edge of fixed finger entire ( Fig. 11C ); fixed finger slightly overreaching dactylus. Minor cheliped fingers with denticulated tooth in proximal part, distal part of cutting edge finely denticulate, more extensive in dactylus than in fixed finger ( Fig. 11E–G ). Ambulatory pereiopods similar with distoventral part of propodus (figs. 12A–D, 13A, B, 14B–G) with one subdistal ventral and pair of distoventral spines; dactyli biunguiculate with posterior acute process on flexor margin of corpus (figs. 12A–D, 13A, B, 14B–G); fifth pereiopods with distolateral half with rows of serrulate setae ( Figs. 13A , 14F ). First abdominal segment without median anterior dorsal lobe. Sixth abdominal segment with posterolateral margin with small tooth ( Fig. 10E ). Distolateral tooth of exopod of uropod distinct with mobile spine medially; mobile spine about twice as long as distolateral tooth ( Fig. 10F ). Both pairs of dorsal spines of telson located in proximal half, anterial par submedian, posterior pair submarginal; lateral pair of distal spines in line with other distal spines, not subdistal or submarginal ( Fig. 10D, E ). Colour ( Fig. 12 ). Colour pattern similar to that figured by Pachelle et al . (2018 : fig. 2). Ecology . Known as an endosymbiont, living in the cloacal cavity of unidentified compound ascidians ( Holthuis, 1951b ) and a compound ascidian of the genus Diplosoma ( Ferreira et al . 2020 ) . Distribution . Known from Florida and Colombia ( Holthuis 1951b ), Dominica ( Chace 1972 ), Cuba ( Martínez-Iglesias 1986 ), Caribbean coast of Panama ( Pachelle et al . 2018 ), Los Roques ( Rodriguez 1986 ) to Brazil ( Vieira et al . 2012 , Ferreira et al . 2020 ) in depths of 1– 73 m . This is the first record of the species for Bonaire .