Cumella reticulata, 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 : 45-48

Cumella reticulata sp. nov.

( Figs 19 , 20)

Material examined. Holotype subadult female ( MGAB CUM 1744 ), El Seco, Vieques Island, Puerto Rico, Caribbean Sea, 18°07'38.0280"N, 65°10'39.9720"W, 70 m, January 17, 2010 ; paratypes: 3 subadult males, 4 subadult females, 1 manca ( MGAB CUM 1745 ), El Seco , Vieques Island, Puerto Rico, Caribbean Sea, 18°07'24.8520"N, 65°12'05.7600"W ; 1 subadult female ( MGAB CUM 1746 ), Enrique reef, La Parguera, Puerto Rico, Caribbean Sea, 17°57'15"N, 67°04'40"W, May 7, 2008, 2.5 m ; 2 subadult males ( MGAB CUM 1747 ), Holein-the-Wall, La Parguera, Puerto Rico, Caribbean Sea, 17°53'05.1360"N, 67°01'18.9120"W, 52 m, February 10, 2011; subadult female dissected ( MGAB CUM 1784 ), North Star , St. Croix , U.S. Virgin Islands, Caribbean Sea, May 1, 2011, 17°46'11.4600" N, 64°49'18.2280" W, 52 m ; 6 subadult females ( MGAB CUM 1790 ), El Seco, Vieques Island, Puerto Rico, Caribbean Sea, 45 m, 18°07'38.0280"N, 65°10'39.9720"W, 70 m, January 17, 2010, collected during the 2010/ 2011 UPRM-DMS Mesophotic cruise.

Diagnosis. Body with granulated integument; five lenses on ocular lobe, serrate anterior half of ventral margin of carapace, pseudorostrum 0.25 times frontal lobe length; maxilliped 3 propodus 1.66 times carpus length; uropodal short peduncle, 0.46 times last pleonite length in female, 0.64 in male; uropodal endopod without medial setae in female.

Description. Subadult female (holotype MGAB CUM 1744).

Body size: 1.30 mm ( Fig. 19 A).

Carapace ( Fig. 19 A), 0.30 times entire body length, 1.56 times as long as high, highly granulated and reticulated integument, five lenses on ocular lobe, serrate anterior half of ventral margin, pseudorostrum 0.25 times frontal lobe length.

Pereon, 0.24 times total body length, highly granulated integument.

Pleon, 0.45 times total body length, granulated integument.

Antenna 1 ( Fig. 19 B). Basal article of peduncle 0.68 times rest of articles together together, one tubercle on median article, long aesthetascs, minute accessory flagellum.

Maxilliped 3 ( Fig. 19 C). Basis 0.53 times rest of articles together, one plumose seta on medial margin, two plumose ones on outer margin, merus 3 times as long as ischium, one denticle on outer margin, one long pappose seta on outer margin; carpus as long as merus length, two plumose short setae on medial margin, one much longer on outer margin; propodus 1.66 times as long as carpus length, two pappose setae on medial margin, one plumose seta on outer margin; dactylus 0.45 times propodus length, terminal robust seta as long as dactylus length, slender exopod.

Pereopod 1 ( Fig. 19 D). Basis 0.57 times rest of articles together, two simple setae on medial margin, one on outer margin; merus 1.09 times as long as ischium, one simple seta on medial margin of both articles; carpus 2 times as long as merus, two simple setae on medial margin; propodus 0.7 times as long as carpus, two simple setae on both margins; dactylus 0.88 times as long as propodus, terminal robust seta as long as dactylus. Exopod, robust.

Pereopod 2 ( Fig. 19 E). Basis 0.76 times as long as rest of articles, merus 4 times as long as ischium, carpus as long as merus, three simple setae on both margins; dactylus 1.37 times as long as propodus, two subterminal stout setae and one terminal robust seta 1.08 times dactylus length. Exopod, robust.

Pereopod 3 ( Fig. 19 F). Basis 0.51 times as long as rest of articles, short simple seta on medial margin of ischium; merus 1.66 times as long as ischium; carpus 1.1 times merus length; propodus 1.08 times as long as carpus, dactylus fused with terminal robust seta.

Pereopod 4 ( Fig. 19 G). Basis 0.57 times as long as rest of articles, merus 1.12 times as long as ischium, one short simple seta on medial margins of ischium and merus; carpus 1.44 times merus as long as, one simple seta on outer margin, merus 1.15 times as long as carpus, dactylus fused with terminal robust seta.

Pereopod 5 ( Fig. 19 H). Basis 0.47 times as long as rest of articles together combined length; merus 1.11 times as long as ischium, one short seta on medial margins of both articles, carpus 1.3 times merus length; propodus 1.15 times as long as carpus, dactylus fused with terminal robust seta.

Uropod ( Fig. 19 I). Short peduncle, 0.46 times last pleonite length, 0.75 times endopod length; exopod 0.8 times endopod length, terminal robust seta as long as exopod length, endopod without lateral setae, terminal robust sensory seta 0.55 times endopod length.

Description. Subadult male (paratype MGAB CUM 1745).

Body size: 1.5 mm (Fig. 20A).

Carapace (Fig. 20A), 0.32 times total body length, 1.58 times as long as high, integument like in female, five lenses on ocular lobe.

Antenna 1 (Fig. 20B). Basal article of peduncle as long as rest of articles combined length, median article 1.84 times apical article length, main flagellum 1.54 times peduncle last article, minute accessory flagellum.

Maxilliped 3 (Fig. 20C). Similar to female maxilliped, it differs in: 1) merus with two plumose setae vs. none; 2) dactylus medial margin with short setae vs. none.

Pereopod 1 (Fig. 20D). Basis 0.67 times rest of articles combined length, long medial simple seta; merus 1.75 times as long as ischium, one simple seta on medial margins of ischium and merus; carpus 1.78 times as long as merus, three simple setae on medial margin of carpus; propodus 0.8 times as long as carpus, two simple setae on medial margin; dactylus 0.5 times propodus length, terminal robust seta as long as dactylus; exopod incompletely developed.

Pereopod 2 (Fig. 20E). Basis 0.93 times as long as rest of articles together, one simple seta on medial margin; merus 3.66 times as long as ischium, one simple seta on medial margin; carpus 1.18 times as long as merus, one simple seta on both margins; dactylus 2.16 times as long as propodus, two simple short setae on medial margin, two subterminal setae and one robust terminal seta, 1.15 times dactylus; exopod like in previous pair.

Pereopod 3 (Fig. 20F). Basis 1.06 times rest of articles combined length; merus 2 times as long as ischium, one simple seta on outer margins of ischium and merus; carpus 1.3 times as long as merus, propodus as long as carpus; dactylus 0.38 times as long as propodus, terminal robust seta 1.6 times as long as dactylus length; exopod like in previous pairs.

Pereopod 4 (Fig. 20G). Basis 0.74 times rest of articles as long as together; merus 1.86 times as long as ischium, one simple seta on outer margin; carpus 0.92 times as long as merus, one simple short seta on medial margin; dactylus 0.5 times as long as propodus, terminal robust seta 1.7 times dactylus length; exopod like in previous pair.

Uropod (Fig. 20H). Peduncle 0.64 times last pleonite length, 1.25 times endopod length; exopod 0.55 times endopod length; endopod with two simple setae on medial margin, one subterminal and one terminal robust seta, 0.54 times endopod length.

Etymology. The name of the species is in reference to the reticulated integument of carapace.

Remarks. Cumella reticulata sp. nov. has a high and short carapace like in C. biserrata , C. pagani , C. jamaicensis , C. medeeae . It differs in having the carapace without denticles, uropodal peduncle shorter than last pleonite, without setae on margins, endopod with short terminal seta vs. carapace with denticles, uropodal peduncle longer than last pleonite in C. biserrata and C. pagani , uropods with lateral setae in all previously mentioned species, endopod shorter than terminal seta in C. jamaicensis .

Figures

FIGURE 19. Cumella reticulata sp. nov. Holotype subadult 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: Scale bars: A, 0.5 mm; B – I, 0.1 mm.