Plesionika escatilis (Stimpson, 1860)

Viana, Girlene Fábia Segundo, Ramos-Porto, Marilena, Torres, Maria Fernanda Abrantes & Santos, Maria Do Carmo Ferrão, 2007, Distribution of Heterocarpus laevigatus Bate, 1888 and Plesionika escatilis (Stimpson, 1860) along the Atlantic coast of South America (Crustacea: Caridea: Pandalidae), Zootaxa 1577 (1), pp. 33-39 : 37

Plesionika escatilis (Stimpson, 1860)

( Figure 3 )

Pandalus escatilis Stimpson, 1860 .

Parapandalus escatilis De Man, 1920:107 .

Parapandalus narval Crosnier & Forest, 1973: 221 , fig. 69a (in part).

Parapandalus sp. Lemaitre, 1984: 444 .

Plesionika escatilis Lemaitre & Gore, 1988: 383 , figs. 1–4.

Description: Rostrum directed dorsally, far overreaching antennal scale, 2–2.5 times as long as carapace, armed dorsally throughout length with 31–57 fixed teeth including 4–5 on carapace above or posterior to orbital margin, armed ventrally with 28–50 fixed teeth. Orbit sloping ventrally, concave posteriorly, nearly, straight dorsally. Antennal spine stronger than pterygostomian spine. Carapace smooth, naked, usually with minute median dorsal tubercle on posterior sixth; median postrostral ridge extending posteriorly to about midlength of carapace. Abdomen with third somite dorsally rounded, unarmed, without median dorsal carina. Pleura of anterior 3 somites rounded, those of fourth and fifth with acute posterolateral angle. Sixth somite 2– 2.5 times as long as fifth, and 2.3–2.7 times as long as maximum height. Telson subequal in length to sixth somite, or slightly shorter, with 2–3 pairs (rarely 4) of small movable spines dorsally; posterior process with 4 pair of movable spines. Antennular peduncle extending to about midlength of antennal scale; stylocerite not exceeding distal margin of first antennular segment, terminating in blunt or sharp tip; flagellum greatly exceeding body length. Antennal peduncle’s basal segment with lateral ventrodistal spine; antennal scale slightly exceeding carapace length, mesial margin with long setae, lateral margin with distal spine reaching to distal margin of blade; flagellum greatly exceeding body length. Third maxilliped overreaching antennal scale by length of ultimate segment, or more; basal part with well developed coxal flange, lacking epipod; penultimate segment 1.3–1.6 times as long as ultimate; ultimate segment terminating in 1 or more long spines. Pereopods long, slender; first and second distinctly shorter than others. First pereopod with minute chela; propodus with row of short setae on ventral margin proximally, and tufts of setae distally. Second pereopod chelate, reaching to about midlength of carpus of first pereopod; carpus subdivided into 19–31 articles (most frequently 24–28), not always consistent left to right in the same specimen. Third to fifth pereopods similar to each other, each exceeding first pereopods by at least length of propodus; merus with row of 9–17 spines ventrally; carpus with scattered setae; dactyl short, bifid. Endopod of first pleopod of male much wider distally than proximally, distalpart unevenly convex. Appendix masculine on second pleopod overreaching appendix interna, with long spines on anteromesial and distal margins. Uropod elongate, setose; endopod shorter than exopod; exopod with short setae on lateral margin, and fixed distolateral spine ( Lemaitre & Gore, 1988).

Type-locality: Madeira Islands, Eastern Atlantic ( Abele & Kim, 1986).

Material examined: Pernambuco: Cruise 04, station 27 (08 o 47,6’S – 34 o 46,7’W), 93 m, eight females (four ovigerous) (83–92 mm TL), 19/11/2000 . Alagoas: Cruise 04, station 7 (09 o 37,1’ S and 35 o 10,9’W), 260 m, one male (83 mm TL), one ovigerous female (95 mm TL), 15/11/2000 . Bahia: Cruise 04, station 13 (11 o 36,3’S – 37 o 13,4’W), 182 m, three males (80–93 mm TL), five ovigerous females (84–105 mm TL), 30/ 10/2000 .

Distribution: Eastern Atlantic: from Madeira to off Congo. Western Atlantic: from Gulf of Mexico and the Bahamas to the Antilles ( Lemaitre & Gore, 1988); Brazil (Bahia, Alagoas and Pernambuco, present contribution).

Habitat: Mesopelagic, inhabits rocky surface of continental and island shelf areas. From 90 to 400 m of depth ( Abele & Kim, 1986; Lemaitre & Gore, 1988).

Figures

FIGURE 3. Plesionika escatilis (Stimpson, 1860), male, DOPE/UFPE A. Lateral view, scale bar = 1 cm; B. Detail of rostrum, scale bar = 0.5 cm.