Penaeus setiferus (Linn.)- White shrimp 



Figures 8-9 



.' Cancer setiferus Linnaeus [In part]. 1767, p. 1054. 

 Penaeus setiferus: Hay and Shore, 1918, p. 378, pi. 25, fig. 5. — 

 Burkenroad, 1939, p. 17 (rev.).— Holthuis, 1962, pp. 115-118. 

 Penaeus fluviatilis: Gunter, 1962a, b, pp. 107-114 ; 118-121. 



Recognition characters. — Integument thin, pol- 

 ished, translucent. Carapace with a high median 

 carina continuous anteriorly with rostrum and 

 extending back about two-thirds length of cara- 

 pace; not grooved posteriorly, with lateral grooves 

 terminating near posterior tooth in rostral series ; 

 armed with 9 or 10 sharp teeth dorsaliy, anterior 

 6 teeth on rostrum proper; postocular crest absent. 

 Rostrum with tip long, slender, unarmed, up- 

 curved distally, apex sometimes depressed, first 

 dorsal tooth near distal edge of eye, ventral edge 

 armed with two teeth. Antennal spine surmount- 

 ing lateral carina extending upward short distance 

 from hepatic spine. Medial antennular flagellum 

 of adult male dorsoventrally flattened and armed 

 dorsaliy with two sizes of teeth. 



Anterolateral marginal ridges of last thoracic 

 sternite of female extending conspicuously mediae! 

 near middle of segment making an interrupted 

 crescentic transverse ridge with concavity directed 

 forward; posterior portion of sternite with con- 

 spicuous pair of fleshy protuberances. Posterior 



margin of 12th sternite with pair of posteromedial 

 convexities extending almost level with median 

 portion of margin. 



Abdomen with fourth to sixth segments cari- 

 nate; carina of sixth segment with a groove on 

 each side. Telson with deep median groove and an 

 acuminate tip. Ventral margin of pleura of first 

 abdominal segment almost straight. Petasma of 

 male with diagonal ridge across face of clisto- 

 lateral lobe. 



Measurements. — Length of body: large male, 

 182 mm.; large female, 197 mm. 



Color. — Body translucent, bluish white with 

 dusky bands and patches composed of scattered 

 black specks; rostrum and sides tinged with pink; 

 blades of pleopods marked with dark red ; anten- 

 nae dark brown ; uropods with tips of blades dark 

 brownish purple with narrow stripe of yellowish 

 green along margin. 



Habitat. — Estuaries and inner oceanic littoral, 

 predominantly on mud bottom from water's edge 

 to 17 fathoms off Atlantic coast; rarely to 43 

 fathoms in Gulf of Mexico (Springer and Bullis, 

 1952). 



Type locality.— Oft Matanzas Inlet, Fla. 



Known range. — Fire Island, N.Y., to Cape Ca- 

 naveral, Fla.; Gulf of Mexico from Pensacola, 

 Fla., to Campeche, Mexico; Cuba; Jamaica. 



Fiouke 8.— Penaeus setiferus (Linnaeus). Animal in lateral view; approximately 25 mm. indicated (after Rathbun, 



1884). 



18 



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