Cumella banarescui, 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 : 60-62

Cumella banarescui sp. nov.

( Fig. 27 )

Material examined. Holotype adult male ( MGAB CUM 1757 ), La Parguera shelf edge, Puerto Rico, Caribbean Sea, exact latitude and longitude is not available, 2008-2009, 45- 60 m depth, collected by Nikolaos V. Schizas.

Diagnosis. Carapace with short siphon, pseudorostrum 0.3 times frontal lobe length, ocular lobe with five lateral lenses and a middle one, short serration on anterior ventral margin. Antenna with basal article of peduncle 0.82 times as long as rest of articles together; maxilliped 3 propodus 0.69 times carpus length; uropodal peduncle 1.34 times last pleonite length.

Description. Adult male (holotype MGAB CUM 1757).

Body size: 2.01 mm

Carapace ( Fig. 27 A). Smooth integument, 0.51 times rest of body length, 1.9 times as long as high, short siphon, pseudorostrum 0.3 times frontal lobe length, ocular lobe with five lateral lenses and a middle one, short serration on anterior ventral margin.

Pereon, 0.17 times entire body length.

Pleon, 0.97 times entire body length.

Antenna 1 ( Fig. 27 B). Basal article of peduncle 0.82 times as long as rest of articles together, middle article with one simple seta and one compose peduculate one on medial margin, one compose pedunculate seta on outer margin, apical article with two simple setae on outer margin, main flagellum as long as apical article of peduncle, short aesthetascs, two compose pedunculate setae and four simple ones, minute accessory flagellum.

Antenna 2. Flagellum reaches the end of pleonite 5, not figured.

Maxilliped 3 ( Fig. 27 C). Basis 1.3 times as long as rest of articles together, several simple setae on medial distal margin, two long pappose setae on outer process; merus 2.09 times as long as ischium, one plumose seta on medial margin of ischium, one pappose seta on medial mergin of merus, one plumose seta on outer margin; carpus 0.76 times as long as merus, short simple setae, two longer ones and one plumose one on medial margin, one long plumose seta on outer margin; propodus 0.69 times as long as carpus, two pappose setae on medial margin, one simple seta on outer margin; dactylus as long as propodus, terminal robust seta 1.54 times dactylus length; fully developed exopod.

Pereopod 1 ( Fig. 27 D). Basis 0.95 times as long as rest of articles together, serrate medial and outer distal margins, one simple seta on each one, merus 1.16 times ischium length, one simple short seta on medial margin of ischium, one simple short seta on each margin of merus; carpus 2.19 times as long as merus, three simple setae on medial margin, two pappose and one simple setae on outer margin; propodus 0.58 times as long as carpus, one simple seta on medial margin, four on outer one; dactylus 0.7 times as long as propodus, two simple setae on each margin, terminal robust seta 1.21 times dactylus length; well developed exopod.

Pereopod 2 ( Fig. 27 E). Basis 1.51 times as long as rest of articles together, serrate both distal margins; merus 7 times as long as ischium, two simple short setae on medial margin of merus; carpus 1.36 times as long as merus, two simple setae on outer margin, two stout ones on medial distal margin; dactylus 1.3 times as long as propodus, one simple short seta on each margin, three, one shorter and two much longer subterminal setae on both margins, terminal robust seta 1.61 times dactylus length; fully developed exopod.

Pereopod 3 ( Fig. 27 F). Basis 1.97 times as long as rest of articles together, serrate outer margin in proximal half, two pappose setae on medial distal margin; merus 4 times as long as ischium, one simple seta on medial margin; carpus 1.25 times as long as merus, one simple seta on medial margin; propodus 0.53 times as long as carpus; dactylus 0.87 times as long as propodus, terminal robust seta as long as dactylus; fully developed exopod. Pereopod 4 ( Fig. 27 G). Basis 1.04 times as long as rest of articles, one simple seta on each margin in distal half, merus 2.8 times as long as ischium, one simple long seta on outer margin of ischium and merus; carpus 1.57 times merus length, one simple short seta on medial margin; propodus 0.72 times as long as carpus; dactylus 0.37 times as long as propodus, fused with terminal robust seta; fully developed exopod.

Pereopod 5 ( Fig. 27 H), broken, only basis to merus available, merus 1.27 times ischium length.

Uropod ( Fig. 27 I). Peduncle 1.34 times as long as last pleonite, 1.22 times endopod length, more pronounced serration on medial margin, three simple short setae on outer margin, two pectinated stout setae on medial margin; exopod 0.53 times as long as endopod, one short simple seta on outer distal margin of each article of exopod, terminal robust seta 1.04 times exopod length; endopod with serrate pectinated medial margin, three microserrate stout setae on medial margin, one broken, one subterminal longer seta and terminal robust seta 0.66 times endopod length.

Etymology. The species is dedicated in honour of the late Petru Bănărescu, world specialist in fishes, as a sign of postumous gratitude and appreciation of his work.

Remarks. Cumella banarescui sp. nov. is similar to other species with a smooth carapace and body, C. curvicauda sp. nov. and C. abacoensis Petrescu, 1996 from Bahamas ( Petrescu, 1996). It differs in: 1) ocular lobe with six vs. five lenses; 2) short siphon vs. long one in C. curvicauda ; 3) maxilliped 3 without spines on merus and carpus like in C. abacoensis ; 4) uropodal peduncle longer than last pleonite vs. shorter in C. curvicauda ; 5) uropodal endopod with four medial setae vs. two in C. curvicauda and seven in C. abacoensis .

Figures

FIGURE 27. Cumella banarescui sp. nov. Holotype male. 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.