Cumella ponceledgensis, Petrescu, Iorgu, Chatterjee, Tapas & Schizas, Nikolaos V., 2016

Petrescu, Iorgu, Chatterjee, Tapas & Schizas, Nikolaos V., 2016, New species and new records of Cumacea (Crustacea: Peracarida: Cumacea) from mesophotic reefs of Puerto Rico and U. S. Virgin Islands, Caribbean Sea, Zootaxa 4199 (1), pp. 1-78 : 20-22

Cumella ponceledgensis sp. nov.

( Fig. 7 )

Material examined. Holotype ovigerous female ( MGAB CUM 1729 ), Ponce Ledge, Puerto Rico, Caribbean Sea, 52 m, 17°55'27.68"N, 66°32'39.08"W, October 19, 2010, collected by Nikolaos V. Schizas.

Diagnosis. Carapace with smooth dorsal margin, strong anterior ventral corner, serrate anterior half of ventral margin, pseudorostrum with apical serrate margin, six large lenses on ocular lobe, maxilliped 3 with two plumose setae on median margin of basis, peduncle of uropod serrate at both margins.

Description. Ovigerous female (MGAB CUM 1729).

Body size: 1.7 mm ( Fig. 7 A).

Carapace ( Fig. 7 A). Smooth integument, 0.43 times as long as rest of body, pseudorostrum 0.37 times frontal lobe length, serrate apical margin, six large lenses on ocular lobe, strong anterior ventral corner, serrate anterior half of ventral margin.

Pereon, 0.19 times total length.

Pleon, 0.49 times body length.

Antenna 1 ( Fig. 7 B). Basis 0.51 times as long as rest of articles together, one simple seta on medial margin of middle article, one compose pedunculate seta on outer margin, middle article 1.14 times apical article length, main flagellum as long as apical article of peduncle, with two aesthetascs, minute accessory flagellum with one compose pedunculate seta.

Maxilliped 3 ( Fig. 7 C). Basis 0.83 times as long as rest of articles together, serrate medial margin with one denticle and two plumose setae, two plumose long setae on outer process; merus 1.87 times as long as ischium, one denticle on both margins, one plumose seta on outer margin; carpus as long as propodus, serrate medial margin with one denticle, long plumose seta on outer distal margin; two pappose setae on propodus, terminal robust seta longer than dactylus; slender exopod.

Pereopod 1 ( Fig. 7 D). Basis 0.6 times as long as rest of articles together, serrate medial distal margin, one simple seta on medial margin; merus 1.06 times as long as ischium, one simple seta on medial margin of ischium, one simple seta on both margins of merus; carpus 2.44 times as long as merus, two simple setae on medial margin, three on outer margin; propodus 0.69 times as long as carpus, one simple seta on each margin; dactylus 0.55 times as long as propodus, terminal robust seta 1.33 times dactylus length; slender exopod.

Pereopod 2 ( Fig. 7 E). Basis 0.53 times as long as rest of articles together, serrate medial margin; merus 4 times as long as ischium, two simple setae on medial margin; carpus 1.36 times as long as merus, two simple setae on outer margin, two stout setae on medial distal margin; dactylus 2 times as long as propodus, serrate medial margin with two simple short setae, three setae on outer margin, two subterminal setae and one terminal robust seta 0.9 times dactylus length; slender exopod.

Pereopod 3 ( Fig. 7 F). Basis 0.98 times as long as rest of articles together, one simple long seta on outer margin, three plumose setae on medial margin, two unequal simple setae on outer margin of ischium; merus 1.44 times as long as ischium, one simple seta on outer margin; carpus 1.41 times as long as merus, one simple seta on medial margin, two annulate ones on outer margin; propodus 0.69 times carpus length, one annulate seta on medial margin; dactylus 0.54 times propodus length, terminal robust seta 1.66 times dactylus length.

Pereopod 4 ( Fig. 7 G). Basis 0.62 times as long as rest of articles together, one long simple seta on outer distal margin; merus 1.22 times as long as ischium, one simple seta on outer distal margin of ischium and merus; carpus 1.72 times as long as merus, two annulate setae and one simple on medial margin; propodus 0.68 times as long as carpus, one annulate seta on medial margin; dactylus 0.54 times propodus length, terminal robust seta 1.57 times dactylus length.

Pereopod 5 ( Fig. 7 H). Basis 0.6 times as long as rest of articles together, one simple long seta on outer distal margin; merus 1.43 times as long as ischium, one simple long seta on outer margins of ischium and merus; carpus 1.7 times as long as merus, one annulate seta on medial distal margin; propodus 0.76 times as long as carpus, one annulate seta on medial distal margin; dactylus 0.3 times as long as propodus, one simple short seta on both margins, terminal robust seta 2.5 times dactylus length.

Uropod ( Fig. 7 I). Peduncle 1.63 times last pleonite length, 1.81 times endopod length, serrate both margins, five simple setae on medial margin; exopod 0.72 times as long as endopod, one simple seta on outer margin of distal article, terminal robust seta 0.87 times exopod length; one simple seta on medial margin of endopod, one subterminal seta and one terminal robust seta 0.59 times endopod length.

Etymology. The species bears the name of the type locality, Ponce Ledge, a known fishing locality near Ponce, Puerto Rico.

Remarks. The new species, Cumella ponceledgensis sp. nov. resembles C. abacoensis Petrescu, 1996 from Abaco Island, Bahamas ( Petrescu, 1996), in the carapace without any dorsal denticles and uropod with long peduncle with serrate margins. The new species differs from C. abacoensis in the 1) ocular lobe with six in the new species vs. five lenses in C. abacoensis ; 2) longer pseudorostrum; 3) apical margin of pseudorostrum serrate vs. smooth; 4) pereopod 1 with one simple seta on medial margin of basis vs. two setae and one plumose on outer margin; 5) pereopod 2 with simple setae on articles vs. plumose setae on basis to merus; 6) uropodal peduncle with five vs. three setae; 7) uropodal endopod with two vs. five setae on medial margin.

Figures

FIGURE 7. Cumella ponceledgensis sp. nov. Holotype female. A, body, lateral view; B, antenna 1; C, maxilliped 3; D, pereopod 1; E, pereopod 2; F, pereopod 3; G, pereopod 4; H, pereopod 5; I, uropod. Scale bars: A, 0.5 mm; B – I, 0.1 mm.