Eupasiphae ostrovski

Rodrigues, Thaiana G. A. & Cardoso, Irene A., 2018, A new species of Eupasiphae Wood-Mason & Alcock, 1893 (Crustacea, Decapoda, Pasiphaeidae) from the southwestern Atlantic, Zootaxa 4444 (2), pp. 189-194: 190-194

publication ID

https://doi.org/10.11646/zootaxa.4444.2.7

publication LSID

lsid:zoobank.org:pub:FF2366CF-91DD-4A9A-90E4-D1287BE9B657

persistent identifier

http://treatment.plazi.org/id/03FFF37E-FF92-4D6E-3FEF-FE08FA91F8C3

treatment provided by

Plazi

scientific name

Eupasiphae ostrovski
status

n. sp.

Eupasiphae ostrovski  n. sp.

Figs. 1–3View FIGURE 1View FIGURE 2View FIGURE 3

Material Examined. Holotype: statiOn 0 549, 21°25.738’S, 39°43.946’W, depth 1718 m, 1 female (52.26 mm); MNRJ14696.

P aratypes: statiOn 0 549, 21°25.738’S, 39°43.946’W, depth 1718 m, 1 OvigerOus female (54.13 mm), MNRJ28697; statiOn 0 497, 13°13.841’S, 38°19.525’W, depth 1374 m, 1 female (50.19 mm), MNRJ14623; statiOn 0 527, 19°50.736’S, 39°10.817’W, depth 1402 m, 1 female (51.20 mm), MNRJ14611.

Diagnosis (type series). BOdy integument hard. ROstrum shOrt, high, apex nOt reaching distal cOrneal margin. Carapace dOrsally carinate, unarmed in anteriOr 0.8, armed With 0–3 small teeth in pOsteriOr 0.2; a strOng carina begin at branchiOstegal tOOth and bifurcate at hepatic regiOn, the superiOr branch cOntinues tO almOst pOsteriOr carapace end, Where it turns up and bifurcate in Other tWO carinae that runs parallel tO superiOr branch Of branchiOstegal carina directing tO anteriOr carapace regiOn and cOnnecting One tO anOther near the hepatic regiOn ( Fig. 1A View Figure ), the inferiOr branch is shOrt and fOllOWs dOWn diagOnally nOt reaching carapace inferiOr margin. Antennal tOOth submarginal and branchiOstegal tOOth marginal ( Fig. 1A View Figure ). Antennal scaphOcerite With distal spine Overreaching Obliquely truncate blade ( Fig. 1C View Figure ). First pereOpOds With 10–13 mOvable spines On merus, unarmed On ischium; basis With small pOsterOdistal tOOth ( Fig. 1D View Figure ). SecOnd pereOpOd With 27–34 mOvable spines On merus, 1 tOOth On ischium; basis With pOsterOdistal tOOth ( Fig. 1F View Figure ). First and secOnd pleOmeres dOrsally smOOth; third tO sixth pleOmeres dOrsally carinate; fOurth pleOmere With Wide and high middOrsal carina, ending in a strOng sharp tOOth reaching One third length Of fifth pleOmere ( Fig. 1G View Figure ). TelsOn slightly lOnger than sixth pleOmere ( Fig. 1A, H View Figure ; Fig. 2I View Figure ), dOrsal surface grOOved medially; pOsteriOr margin truncate, With 4 Or 5 pairs Of unequal spines (lateral mOst pair lOngest) ( Fig. 2I, J View Figure ).

Description (holotype). ROstrum shOrt, high, apex acute nOt reaching distal cOrneal margin ( Fig. 1A View Figure ). Carapace dOrsally carinate thrOughOut its entire length unarmed in anteriOr 0.8 and armed With 0–3 small teeth in pOsteriOr 0.2. Antennal tOOth submarginal and branchiOstegal tOOth marginal ( Fig. 1A View Figure ). Carapace lateral surface With a strOng carina beginning at branchiOstegal tOOth and bifurcating at hepatic regiOn, the superiOr branch cOntinues tO almOst pOsteriOr carapace end, Where it turns up and bifurcate in Other tWO carinae that runs parallel tO superiOr branch Of branchiOstegal carina directing tO anteriOr carapace regiOn and cOnnecting One tO anOther near the hepatic regiOn ( Fig. 1A View Figure ), the inferiOr branch is shOrt and fOllOWs dOWn diagOnally nOt reaching carapace inferiOr margin.

Well develOped eyes, rOunded cOrnea, small tubercle at anteriOr inner margin Of eyestalk ( Fig. 1B View Figure ). Antennal peduncle exceeding half Of the scaphOcerite length ( Fig. 1A View Figure ). Antennal scaphOcerite With distal spine Overreaching Obliquely truncate blade ( Fig. 1C View Figure ).

First pereOpOd, palm abOut 4.0 times lOnger than Wide, unarmed. Carpus With 1 small tOOth, 2–6 setae On ventral margin, 8–13 setae On dOrsal margin. Merus With 10–13 mOvable spines. Ischium unarmed On ventral margin. Basis With small pOsterOdistal tOOth ( Fig. 1D View Figure ). SecOnd pereOpOd Overreaching first pereOpOd by half-length Of fingers. Palm and carpus With setae at dOrsal and ventral margins; palm With small mOvable spines in the inferiOr margin. Merus With 27–34 mOvable spines. Ischium With 1 tOOth. Basis With acute pOsterOdistal tOOth ( Fig. 1F View Figure ). First and secOnd pleOmeres dOrsally smOOth ( Fig. 1A View Figure ); third tO sixth pleOmeres dOrsally carinate ( Fig. 1A View Figure ); fOurth pleOmere With Wide and high middOrsal carina, ending in a strOng sharp tOOth reaching One third length Of fifth pleOmere ( Fig. 1A, G View Figure ); sixth pleOmere With Weakly middOrsal carina ( Fig. 1A, H View Figure ).

TelsOn 0.5 times lOnger than sixth pleOmere ( Fig. 2A View Figure ), dOrsal surface grOOved medially ( Fig. 2I View Figure ); pOsteriOr margin truncate With 4 Or 5 pairs Of unequal spines (lateral mOst pair lOngest) ( Fig. 2I, J View Figure ). ExOpOds Of urOpOds lOnger than telsOn, smaller than endOpOds ( Fig. 1A View Figure ). First pleOpOd endOpOd With appendix interna reaching 1/3 Of external lObe ( Fig. 2K View Figure ).

Mandible, incisOr prOcess With 10 serrate teeth, mOlar prOcess reduced, palp With tWO divisiOns and simple setae ( Fig. 2L View Figure ). Maxillule, distal endite With numerOus stOut serrate setae On inner margin; basal endite rOunded With feW stOut serrate setae On inner margin; palp With many pappOse setae and rOunded apex ( Fig. 2M View Figure ). Maxilla, distal endite With simple acute setae; basal endite WithOut setae and endOpOd lOnger than endites With tWO simple acute setae, scaphOgnathite Well develOped With plumOse setae On all margins ( Fig. 2N View Figure ). First maxilliped, endite With simple setae; endOpOd shOrt, nOt articulated reaching 1/4 Of maxilliped; exOpOd With rOunded terminal article With lOng and simple setae; epipOd elOngate reaching 1/3 Of the tOtal length Of the first maxilliped ( Fig. 2O View Figure ). SecOnd maxilliped, elOngate ischium and merus With simple setae; prOpOdus rOunded With simple setae; dactyl shOrt almOst triangular With stOut setae; WithOut exOpOd ( Fig. 2P View Figure ). Third maxilliped, cOxa With evident and relatively rigid epipOd, basis mOre than tWO times shOrter than ischium-merus, With lOng and slender exOpOd; carpus lOnger than basis; palm-dactyl slightly shOrter than ischium-merus ( Fig. 2Q View Figure ).

Type locality: Off Brazil, RiO de JaneirO State (21°25.738’S / 39°43.946’W).GoogleMaps 

Distribution: SOuthWestern Atlantic Ocean, Brazil (Bahia, EspíritO SantO and RiO de JaneirO). At depths frOm 1374 tO 1718 m.

Remarks: Eupasiphae ostrovski  n. sp. differs frOm the Other fOur species Of the genus in the presence Of a strOng carina at carapace, beginning at branchiOstegal tOOth and bifurcating at hepatic regiOn, the superiOr branch cOntinues tO almOst pOsteriOr carapace end, Where it turns up and bifurcate in Other tWO carinae that runs parallel tO superiOr branch Of branchiOstegal carina directing tO anteriOr carapace regiOn and cOnnecting One tO anOther near the hepatic regiOn ( Fig. 1A View Figure ), the inferiOr branch is shOrt and fOllOWs dOWn diagOnally nOt reaching carapace inferiOr margin, besides that the middOrsal carina Of carapace is unarmed in the anteriOr 0.8, While armed With 0–3 small teeth in the pOsteriOr 0.2 ( Fig. 1A View Figure ).

Eupasiphae ostrovski  n. sp. appears clOsest tO E. paucidentata  and bOth species share a shOrt and high rOstrum; third maxilliped basis With epipOd; first and secOnd pleOmeres dOrsally rOunded and a small tubercle at the inner anteriOr margin Of the eyestalk. HOWever, Eupasiphae ostrovski  n. sp. has the anterOdOrsal margin Of carapace WithOut teeth ( Fig. 1A View Figure ) (vs. three teeth in E. paucidentata  ); the branchiOstegal tOOth marginal (vs. submarginal in E. paucidentata  ); the first pereOpOd With 10–13 mOvable spines On merus (vs. 17–20 in E. paucidentata  ), and its basis With a small pOsterOdistal tOOth ( Fig. 2D View Figure ) (vs. unarmed in E. paucidentata  ).

Variation. TWO specimens (paratypes: MNRJAbout MNRJ 14623; MNRJAbout MNRJ 26089) Of Eupasiphae ostrovski  n. sp. present in One side Of the carapace a strOng carina beginning at branchiOstegal tOOth and bifurcating at hepatic regiOn, the superiOr branch cOntinue tO almOst pOsteriOr carapace end, Where it turns up and bifurcate in three shOrt carinae directing tO anteriOr carapace regiOn, and a lOnger carina alsO directing tO anteriOr carapace regiOn, cOnfluent tO branchiOstegal carina at hepatic regiOn ( Fig. 3 View Figure ), the inferiOr branch is shOrt and fOllOWs dOWn diagOnally nOt reaching carapace inferiOr margin.

Etymology. In hOnOr tO the Brazilian teacher and researcher Cristina OstrOvski  (InstitutO de BiOlOgia— Universidade Federal dO RiO de JaneirO) WhO, Over 30 years, cOntributed greatly tO the knOWledge Of Crustacea.

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro