New species and new records of Cumacea (Crustacea: Peracarida: Cumacea) from mesophotic reefs of Puerto Rico and U. S. Virgin Islands, Caribbean Sea Author Petrescu, Iorgu Author Chatterjee, Tapas Author Schizas, Nikolaos V. text Zootaxa 2016 4199 1 1 78 journal article 10.11646/zootaxa.4199.1.1 69a1f8c2-5c8b-426f-b854-966a30eed12e 1175-5326 168483 A4189C55-131B-4879-9147-D8FF3279D473 Cumella gurui Petrescu, Chatterjee & Schizas, 2014 Cumella gurui Petrescu et al . 2014c , p. 366. Material Examined . 1 adult female (broken) ( MGAB CUM 1780 ), El Seco , Vieques Island, Puerto Rico , Caribbean Sea , 18°07'24.8520"N , 65°12'05.7600"W , 52–67 m , January 17, 2010 , 1 subadult female ( MGAB CUM 1801 ), Abrir La Sierra , Puerto Rico , Caribbean Sea, collected during the 2010, UPRM-DMS Mesophotic Cruise. Diagnosis . Carapace with dark spots on anterior half, uropodal peduncle 1.15 times pleonite 6 length, endopod with eleven setae. Remarks . This species was described earlier from Mona Island, Puerto Rico (see Petrescu et al ., 2014c ). Distribution . Puerto Rico. Depth range: 67–73.1 m . Cumella tourmalinae sp. nov. ( Fig. 2 ) Material examined . Holotype : ovigerous female ( MGAB CUM 1720 ), Tourmaline reef, Puerto Rico , Caribbean Sea , 18°10'31.0800"N , 67°19'38.2800"W , 54 m , April 29, 2012 ; paratype : subadult female ( MGAB CUM 1721 ), Tourmaline reef, Puerto Rico , Caribbean Sea , collected during the 2012 UPRM-DMS Mesophotic Cruise. Diagnosis . Carapace with three dorsal denticles, smooth ventral margin, pseudorostrum about half of frontal lobe length, long siphon, ocular lobe with six lenses, maxilliped 3 propodus 1.87 times carpus length; uropodal peduncle 1.4 times last pleonite length, peduncle of uropod with four seta on medial margin, one seta on medial margin of endopod. Description . Ovigerous female ( holotype MGAB CUM 1720). Body size: 2.15 mm . Carapace ( Fig. 2 A), 0.22 times the entire body length, ocular lobe with six lenses, 2.11 times longer than high, granulous integument, four dorsal setae on left side, three dorsal denticles, pseudorostrum 0.47 times frontal lobe length, long siphon, smooth ventral margin. Pereon, five articles visible, 0.17 times entire body length, one distal seta on first segment, two setae on segments 3rd to 5th. Pleon, 0.6 times entire body length, smooth integument, two setae on posterior extremity of each segment. Antenna 1 ( Fig. 2 B). Basal article of peduncle 0.7 times as long as rest of articles together, one short simple seta on medial margin, main flagellum 0.81 times apical article of peduncle length, minute accessory flagellum. Maxilliped 3 ( Fig. 2 C). Basis 0.64 times as long as remaining articles combined, two long plumose setae on outer process; merus 3.5 times as long as ischium, one short plumose seta on medial margin, one denticle and one long plumose seta on outer margin; carpus 0.61 times as long as merus length with one simple seta on medial margin, one plumose longer seta on distal margin; propodus 1.87 times as long as carpus, two pappose setae on medial margin, one short plumose seta on outer margin; dactylus 0.4 times as long as propodus, terminal robust seta almost as long as dactylus length; slender exopod. Pereopod 1 ( Fig. 2 D). Basis 0.58 times as long as rest of articles together, two simple setae on medial margin; merus 1.25 times as long as ischium, one seta on medial margin of ischium, one on both margins of merus; carpus 3.2 times as long as merus, four simple setae on medial margin, four on outer margin; propodus 0.69 times as long as carpus, two setae on medial margin, one on outer margin; dactylus 0.45 times as long as propodus, terminal robust seta 1.3 times dactylus length. Pereopod 2 ( Fig. 2 E). Basis 0.59 times as long as rest of articles together, one long simple seta on medial margin; merus 3.25 times as long as ischium, one simple seta on medial of ischium, two on merus; carpus 1.61 times as long as merus, two setae on median margin; dactylus 2.75 times as long as propodus, one seta on medial margin, three setae on outer margin, two subterminal setae and one terminal robust seta 1.09 times dactylus length. FIGURE 2. Cumella tourmalinae 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–H, 0.1 mm; I, 0.2 mm. Pereopod 3 ( Fig. 2 F). Basis 0.98 times as long as rest of articles together; merus 1.8 times as long as ischium, one simple seta on outer margin; carpus 1.77 times as long as merus, one simple short seta on outer and one on medial margins; propodus 0.81 times as long as carpus, short simple seta on medial margin; dactylus 0.38 times as long as propodus, one simple seta on outer margin, terminal robust seta 2.6 times dactylus length. Pereopod 4 ( Fig. 2 G). Basis 0.7 times as long as rest of articles together; merus 1.5 times as long as ischium, one simple seta on outer margin; carpus 3.63 times as long as merus, one simple short seta on outer margin; propodus 0.6 times as long as carpus; dactylus 0.33 times as long as propodus, terminal robust seta 1.72 times dactylus length. Pereopod 5 ( Fig. 2 H). Basis 0.4 times as long as rest of articles together; merus 1.4 times as long as ischium; carpus 3.83 times as long as merus, one short simple seta on medial margin; propodus 0.65 times carpus length; dactylus 0.5 times propodus length, one simple short seta on outer margin, terminal robust seta 1.85 times dactylus length. Uropod ( Fig. 2 I). Peduncle 1.4 times as long as last pleonite, 1.47 times as long as endopod, four sensory setae on medial margin; exopod 0.63 times as long as endopod, with two articles, terminal robust seta 1.41 times exopod length; one simple sensory seta on medial margin of endopod, one subterminal seta, terminal robust seta 0.58 times endopod length. Etymology . The species bears the name of the type locality, Tourmaline, Puerto Rico , a reef system, 14 km west of the city of Mayagüez . Remarks . Cumella tourmalinae sp. nov. is similar to C. manolelii Petrescu, Chatterjee & Schizas, 2013 also from La Parguera, Puerto Rico ( Petrescu et al ., 2013 ), in having three dorsal denticles on the carapace and the uropod with four setae on the peduncle and two on the endopod. Cumella tourmalinae sp. nov. can be easily differentiated from C. manolelii in having a smooth ventral margin of the carapace compared to a serrate ventral margin in C. manolelii . Other differences between C. tourmalinae and C. manolelii include: ocular lobe with six instead of five lenses; longer siphon; less setae on carapace; pereopod 1 with longer carpus; pereopod 2 with longer dactylus; higher ratio of peduncle vs. last pleonite, 1.4 vs. 1.13. Cumella multisetosa sp. nov. ( Fig. 3 ) Material examined . Holotype : ovigerous female ( MGAB CUM 1722 ), southeast Vieques Island, Puerto Rico , Caribbean Sea , 18°05'28.2120"N , 65°20'01.2120"W , 55 m , April 26, 2011 , collected during the 2011 UPRM-DMS Mesophotic cruise. Diagnosis. One denticle on dorsal margin of carapace, numerous terminal setae on anterior margin of pseudorostrum, ocular lobe with five lateral lenses and a median one, carapace with serrated inner ventral margin, maxilliped 3 propodus 1.5 times carpus length; uropodal peduncle 1.23 times last pleonite length. Description. Ovigerous female ( holotype MGAB CUM 1722). Body ( Fig. 3 A). Body size: 2 mm . Carapace ( Fig. 3 A, B), 0.28 times entire body length, 1.56 times as long as high, 1.57 times as high as wide, one denticle on dorsal keel of carapace, numerous terminal setae on the anterior margin of the pseudorostral lobes, large antennal notch, ocular lobe with five lateral lenses and a median one, serrated inner ventral margin. Pereon, 0.7 of carapace length, two dorsal setae on 3rd and 4th segment. Pleon, 1.12 times rest of body length, dorsal setae on first four segments. Antenna 1 ( Fig. 3 C). Basal article of peduncle 0.9 times as long as rest of articles together, three setae on medial one, main flagellum 0.66 times last article length, 1–articled accessory flagellum. Maxilliped 3 ( Fig. 3 D). Basis 0.44 times as long as rest of articles together, three plumose setae on medial margin, two longer ones on outer process; merus 3 times as long as ischium, two spines and two setae on medial margin, one spine and a long pappose seta on outer margin; carpus 0.9 times merus length, two simple and three pappose setae on medial margin, long plumose seta distally; propodus 1.5 times as long as carpus, three pappose setae on medial margin, one simple seta on outer distal angle; dactylus 0.29 times propodus length, terminal robust seta as long as dactylus; slender exopod. FIGURE 3. Cumella multisetosa sp. nov. Holotype female. A, body, lateral view; B, carapace, dorsal view; C, antenna 1; D, maxilliped 3; E, pereopod 1; F, pereopod 2; G, pereopod 3; H, pereopod 4; I, pereopod 5; J, uropod. Scale bars: A, B, J, 0.5 mm; C–I, 0.1 mm. Pereopod 1 ( Fig. 3 E). Basis 0.52 times as long as rest of articles together, serrate distal margins, three setae on medial margin; merus 1.28 times as long as ischium, two unequal setae on medial margins of ischium and merus; carpus 2.33 times as long as merus, five setae on medial margin, four on outer one; propodus 0.69 times carpus length, two setules on medial margin, three on outer margin; dactylus 0.56 times as long as propodus, terminal robust seta longer than dactylus; slender exopod. Pereopod 2 ( Fig. 3 F). Basis 0.78 times as long as rest of articles together, three simple setae on medial margin; merus 5.3 times as long as ischium, one seta on medial margin; carpus 1.18 times as long as merus, three stout setae on distal margin, two simple ones on outer margin; propodus 0.94 times as long as carpus; dactylus 1.66 times as long as propodus, two stout short setae on medial margin, two medial ones, two long pectinate sensory subterminal setae, two shorter ones and a long terminal pectinate seta 1.16 times dactylus length, six sensory setae and two simple ones; slender exopod with a long peduncle. Pereopod 3 ( Fig. 3 G). Basis 1.19 times as long as rest of articles together, five setae on medial margin, seven setae on outer one, one distal seta, ischium with two long setae on outer margin; merus 1.5 times as long as ischium, one outer seta; carpus 1.16 times as long as merus, 1 simple seta on each margin, one distal annulate seta; propodus 1.14 times as long as carpus, one simple seta on medial margin, one annulate seta on distal margin, dactylus 0.43 times propodus length, with stout terminal seta. Pereopod 4 ( Fig. 3 H). Basis 0.78 times as long as rest of articles together, one simple seta on medial margin; merus 1.54 times as long as ischium, two long outer setae on ischium, one on merus; carpus 1.17 times as long as merus, two simple and one annulate setae on medial margin; propodus 0.75 times as long as carpus, one small seta and one annulate seta on medial margin; dactylus 0.4 times as long as propodus, one simple seta on each margin, terminal robust seta twice as long as dactylus. Pereopod 5 ( Fig. 3 I). Basis 0.77 times as long as rest of articles combined together, one stout long seta on outer margin of ischium; merus 1.45 times as long as ischium, one stout seta on outer margin; carpus 1.12 times as long as merus, two annulate setae and a small seta on medial margin; propodus 0.66 times as long as carpus, one annulate seta on medial margin; dactylus 0.5 times as long as propodus, one setule on medial margin, terminal robust seta 2.4 times dactylus length. Uropod ( Fig. 3 J). Peduncle 1.23 times as long as last pleonite, three setae on medial margin, 1.5 times as long as endopod length; exopod 0.85 times as long as endopod, terminal robust seta shorter than exopod; endopod with two setae on medial margin, short terminal robust seta. Etymology . The species is named multisetosa for the numerous terminal setae on the anterior margin of the pseudorostrum. Remarks. Cumella multisetosa sp. nov. resembles C. croixensis sp. nov. in having one denticle on the dorsal margin of carapace, six lenses on the ocular lobe, carapace with serrate ventral margin, and serrate anterior ventral corner. The present new species can be easily differentiated from C. croixensis in having numerous terminal setae on the anterior margin of the pseudorostrum while C. croixensis has a serrate anterior margin of the pseudorostrum with no setae. Other differences include more setae on maxilliped 3 and pereopods; three setae on medial margin of uropodal peduncle in C. multisetosa vs. none in C. croixensis ; uropodal peduncle longer than last pleonite in C. multisetosa vs. shorter in C. croixensis .