Stylopandalus Coutiére, 1905

Cardoso, Irene, 2009, Report on some Plesionika Bate, 1888 and first record of Stylopandalus Coutiére, 1905 (Caridea, Pandalidae) from Brazilian waters, Zootaxa 2120, pp. 53-68 : 64-66

Genus Stylopandalus Coutiére, 1905

( Figs. 7 , 8 )

Stylopandalus Coutiére, 1905: 115 ; Chace, 1985: 135; Holthuis, 1993: 278.

Diagnosis: Rostrum immovably attached to carapace, armed with fixed teeth on both margins. Carapace without supraorbital spine and lateral carinae; dorsally carenate anteriorly, rounded posteriorly. Third abdominal somite bearing movable posteromesial stout seta (frequently lost). Cornea wider than eyestalk. Second maxilliped with terminal segment longer than wide. Maxilliped 3 with exopod. Pereopods without epipods; pereopod 2 with carpus subdivided in to more than three articles (modified from Chace, 1985).

Remarks: Chace (1985) affirms that the single species that prompted Coutière (1905) to propose the subgenus Stylopandalus seems sufficiently distinct from the members of the genus Plesionika to justify generic recognition. The author pointed that the most significant feature, taxonomically, is the elongate terminal segment of the maxilliped 2 ( Fig. 8 A). Also of generic importance, is the slender movable spine in abdominal somite 3 (but it is frequently lost), and the appendix masculina on pleopod 2 unusually slender, with long stout setae along the anterior margin ( Fig. 8 B). The dactyls of pereopods 3–5 with single distal long stout setae were incomplete (in more than a half of their length, Fig. 8 C) in Brazilian material observed herein.

Figures

FIGURE 7. Stylopandalus richardi (Coutiére, 1905), male, MNRJ 19995 (carapace length 7.2 mm); A, lateral view; B, right antennule, dorsal view; C, right scaphocerite, dorsal view (as, antennal spine; ps, pterygostomian spine; st, stylocerite); D, right pereopod 2, lateral view; E, left pereopod 2, lateral view.

FIGURE 8. - Stylopandalus richardi (Coutiére, 1905), male, MNRJ 19995 (carapace length 7.2 mm); A, left maxilliped 2, dorsal view; B, appendix interna and appendix masculina of right second pleopod, lateral view; C, propod and dactyl of pereopod 3, lateral view; D, pleura of abdominal somites 3 – 5, lateral view (AS, abdominal somite); E, telson and uropods, dorsal view.