Ephyrina benedicti Smith, 1885

Cardoso, Irene & Contents, Paulo Young Table Of, 2005, Deep-sea Oplophoridae (Crustacea Caridea) from the southwestern Brazil, Zootaxa 1031 (1), pp. 1-76 : 33-39

publication ID

https://doi.org/ 10.11646/zootaxa.1031.1.1

publication LSID

lsid:zoobank.org:pub:BDBAFE95-EF09-4574-9308-B8F39657CD1E

DOI

https://doi.org/10.5281/zenodo.5052963

persistent identifier

https://treatment.plazi.org/id/03D05B22-FF9F-A21A-FE9E-FA944FE0094B

treatment provided by

Felipe

scientific name

Ephyrina benedicti Smith, 1885
status

 

Ephyrina benedicti Smith, 1885

( Figs 24–28 View FIGURE 24 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 )

Ephyrina benedicti Smith, 1885: 506 ; De Man, 1920: 46; Crosnier & Forest, 1973: 65, figs 18, 19a; Chace, 1986: 33.

Tropiocaris planipes Bate, 1888: 835 View in CoL , pl. 136, fig. 1.

Material examined: Revizee Program: E­0519, 13°19’S, 38°19’W, 1730m, 1 ovigerous female (30mm), MNRJ 14885 View Materials GoogleMaps ; E­0538, 20°27’S, 39°38’W, 1680m, 1 female (28mm), MNRJ 18883 View Materials GoogleMaps ; E­0526, 20°06’S, 38°40’W, 1637m, 1 female (30mm), 1 male (37mm), MNRJ 18884 View Materials GoogleMaps .

Diagnosis: Carapace with rostrum short reaching 1/4 of scaphocerite length, unarmed; antennal and branchiostegal spine present, but not prominent; branchiostegal spine without distinct carina. Abdomen not dorsally carinate on all somites; somites 3 and 4 with posteromesial tooth, the one of somite 3 distinctly strong. Male pleopod 1, endopod rounded, posterior margin with densely plumose setae, anterior margin with a slender and elongate lobe, with stout setae on anterior margin and numerous hook setae on apex; male pleopod 2 with appendix interna, as long as appendix masculina, distal portion slightly triangular in shape, with hook setae; appendix masculina with acute simple setae on distal margin.

Description: Eyestalk without an ocellus on medio­distal portion ( Fig. 24B View FIGURE 24 ). Carapace with rostrum laterally compressed in subtriangular shape, short, reaching 1/4 of scaphocerite length, unarmed ( Fig. 24A View FIGURE 24 ); dorsal margin not carinate; antennal and branchiostegal spines present; branchiostegal spine without distinct carina; supraorbital and pterygostomian spines absent; sinuous lateral gastro­orbital carina extending from near orbit to near posterior margin; well marked cervical groove; suprabranchial carina absent ( Fig. 24A View FIGURE 24 ). Stylocerite with straight margins, acute apex reaching end of first antennular peduncle article; first antennular peduncle article with distal margin serrate on outer half ( Fig. 24C View FIGURE 24 ). Scaphocerite broad at base, narrowing on tip, densely plumose setae on inner margin, distal tooth on outer margin ( Fig. 24D View FIGURE 24 ). Mandible with palp threearticulated; incisor process with about six teeth; molar process triangular, numerous small simple setae on apex ( Fig. 25A, B View FIGURE 25 ). Maxilla 1 with two endites; distal endite with numerous stout setae on inner margin; basal endite with long, stout, pectinate setae and short, broad, plumose setae on inner margin; palp with several pappose setae on rounded apex, without protuberance ( Fig. 25C View FIGURE 25 ). Maxilla 2 with two endites; distal endite bilobed, both lobes with long, stout, pectinate setae on inner margin; basal endite rounded, densely plumose setae on inner margin; endopod as long as endites, pappose setae on apex, several simple setae on inner margin; scaphognathite with densely plumose setae on all margins ( Fig. 25D View FIGURE 25 ). Maxilliped 1 endite with pectinate and pappose setae on inner margin; endopod three­articulated, as long as endite, with pappose setae on apex, several simple setae on inner margin; exopodal lobe with densely plumose setae in all margins ( Fig. 25E View FIGURE 25 ). Maxilliped 2 endopod with elongate ischium and merus, pappose setae on inner margin; carpus short; propod rounded with pectinate and long, stout, pectinate setae on inner margin; dactyl with long, stout setae on inner margin, and several long, stout, pectinate setae on distal margin; exopod with densely plumose setae on all margins ( Fig. 25F View FIGURE 25 ). Maxilliped 3 slender and elongate, propod­dactyl with stout setae on apex; exopod with densely plumose setae on all margins ( Fig. 25G View FIGURE 25 ). Pereopods 1 and 2 not chelate, dactyl with many stout setae. Pereopods 3 to 5 with ischium and merus laterally strongly compressed. Pereopod 3, merus with five stout setae on inner margin. Pereopod 4, merus with four stout setae on inner margin. Pereopod 5, merus with three stout setae on inner margin ( Fig. 24A View FIGURE 24 ). Epipods with mesial teeth, on pereopods 1 to 3 ( Fig. 26A, B View FIGURE 26 ). Abdomen without dorsal carina on somites; somites 3 and 4 with posteromesial tooth; the one of somite 3 distinctly strong; somite 6 at least 1 ½ times longer than high ( Fig. 24A View FIGURE 24 ). Male pleopod 1 endopod rounded, densely plumose and stout setae on posterior margin, distal lobe slender and elongate with stout setae on anterior margin and numerous hook setae on apex ( Fig. 26C View FIGURE 26 ); Male pleopod 2 with long, slender, appendix masculina acute simple setae on apex; appendix interna as long as appendix masculina, apex slightly triangular, numerous hook setae ( Fig. 26D View FIGURE 26 ). Female pleopod 1 endopod rounded, densely plumose setae on all margins ( Fig. 26E View FIGURE 26 ). Exopod of uropod with complete diaresis, one distal spine on outer margin ( Fig. 27 View FIGURE 27 ). Telson not sulcate in dorsal midline, with about 24 pairs of dorsolateral stout setae, without distal setae ( Fig. 27 View FIGURE 27 ).

Distribution: Western Atlantic: South Greenland (56°56’S; 51°17’W), U.S.A. (40°26’S; 67°05’W), Brazil (Bahia, Espírito Santo). Eastern Atlantic: south­west Ireland (50°28’S; 11°39’W), west Portugal (36° to 45°S; 11°W), west Canary Archipelago, Gabon, Saint Tomé Island. Indian and Pacific Oceans: northeastern Philippine Sea, west of Bonin Islands, Japan, Hawaii. Adults probably are mesopelagic and bathypelagic ( Crosnier & Forest 1967; Chace 1986; Crosnier 1987).

Remarks: This species occurs on Indian, Pacific and Atlantic Oceans. In the Western Atlantic this species was recorded only from North America. This is the first record of this genus and species from Brazilian waters (South America) ( Fig. 28 View FIGURE 28 ).

Ephyrina emcompasses six species, four of them occurring in the North Western Atlantic. Of these, two ( E. figueirai Crosnier & Forest, 1973 and E. ombango Crosnier & Forest, 1973 ) have abdominal somite 3 without a dorsal tooth, distinct from E. benedicti and E. bifida Stephensen, 1923 that have abdominal somite 3 with a dorsal tooth. Ephyrina bifida has abdominal somite 3 with bifid dorsal tooth, and the telson with four to seven pairs of dorsolateral stout setae, while E. benedicti has abdominal somite 3 with a simple dorsal tooth, and the telson with 22 to 27 pairs of dorsolateral stout setae.

The samples examined herein agree with the description of Smith (1885) in the carapace and abdominal somites without a dorsal carina, the simple dorsal tooth on abdominal somite 3 and the telson much longer than the sixth somite, with 20 to 25 dorsolateral stout setae. Crosnier & Forest (1973) illustrated the suprabranchial carina but not the cervical groove observed in the present material.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Oplophoridae

Genus

Ephyrina

Loc

Ephyrina benedicti Smith, 1885

Cardoso, Irene & Contents, Paulo Young Table Of 2005
2005
Loc

Tropiocaris planipes

Bate, C. S. 1888: 835
1888
Loc

Ephyrina benedicti Smith, 1885: 506

Chace, F. A. 1986: 33
Crosnier, A. & Forest, J. 1973: 65
Smith, S. L. 1885: 506
1885
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