Upogebia paraffinis A. B. Williams 1993

Upogebia paraffinis

Upogebia affinis.—Rathbun, 1900:151 [NE Brazil].—Williams, 1965a:103 [part, Brazilian distrib.]; 1974b:41 [same]; 1984a:191 [same]; 1986:12 [same].—Coêlho, 1966:163, 168 [estuarine distrib.]; 1970:56 [same].—Gomes Corrêa, 1968:107 [Brazilian specimens, not figs. 16–21,30,31], 108 [key, part].—Coêlho et al., 1970:508 [ecol., distrib.].—Thistle, 1973:1–14, 23 [part, Brazilian distrib.].—Williams and Wigley, 1977:9 [part, Brazilian distrib.].—Coêlho and Ramos-Porto, 1987:33 [key, part], 36 [Brazilian distrib.].

Upogebia (Upogebia) affinis.—De Man, 1927:50 [part, Brazilian specimens]; 1928:22 [list, habitat, Brazilian specimens], 45, 46 [key appl, to Brazilian material].—Schmitt, 1935:196 [Brazilian distrib.].—Coêlho and Ramos, 1972:163 [Brazilian distrib.].—Coêlho and Rattacaso, 1988:383 [key, part], 384 [Brazilian distrib., ecol.].

MATERIAL EXAMINED.—BRAZIL: Ceará: MZUSP 8054, 1 (paratype), Ponta do Trapia, Camocim, Paulo Young, 6 Aug 1982. Paraíba: USNM 22055, 1 , 1 (paratypes), Cabedelo, Rìo Paraíba do Norte estuary, Ilha da Restinga, M.L. Christofferson, 13 May 1980. São Paulo: MZUSP 9103, 1 , Praia do Codo, Saco da Ribera, Ubatuba, in Halodule wrightii, Jul 1986; MZUSP 8049, (holotype), 1 (allotype), Praia do Araçá, São, Sebastião, S. Rodrigues, 10 Nov 1966; MZUSP (unnumbered), 1 , 4 (2 ovig.) (paratypes), Praia do Araçá, São Sebastião, J.A. Peterson, 11 Nov 1966.

DIAGNOSIS.—Rostrum almost always with anteriorly projecting spine terminating ventral row of spines. Projections to either side of rostrum ending in strong spine. Postocular spine present. Abdominal sternites unarmed. T subrectangular. Carpus of cheliped with 2 very strong spines below mesiodorsal spine on mesiodistal margin. Merus of P2 with proximal mesioventral spine and 1 subdistal dorsal spine; merus of P3 with ventrolateral cluster of spines; merus of P4 spineless.

DESCRIPTION.—Rostrum triangular, slightly broader at base than long, slightly downturned; median ventral keel bearing 2–3 variably developed spines, anteriormost usually projecting strongly forward, usually exceeding eyestalks in normal position by – their length; dorsal pair of subapical spines followed on each side by 2–4 often asymmetrically arranged spines; middorsal area spineless; posteriorly divergent lateral ridge bearing crest of about 12 spines, strongest on process lateral to rostrum and decreasing almost to obsolescence posteriorly. Shoulder paralleling cervical groove bearing 1 spine below intersection with thalassinidean line. Postocular spine present.

Abdominal sternites unarmed.

T with well-developed median furrow, distal margin biarcuate; transverse proximal ridge confluent with lateral ridges unspined.

Eyestalk stout, deepest at about midlength, convex ventrally, almost straight dorsal side sometimes bearing 1 or 2 small spines and 1 or 2 tiny spines on basal flange; prominent terminal cornea narrower than diameter of stalk and directed ventrolaterally.

A1 peduncle reaching to about midlength of terminal article of A2 peduncle, its proximal 2 articles together slightly longer than terminal article, proximal article with small distoventral angle mesially.

A2 peduncle with about its length extending beyond tip of rostrum; article 1 usually spineless ventrally, but sometimes bearing acute spine; article 2 bearing strong subdistal ventral spine; scale moderate, oval.

Mxp3 bearing epipod.

Epistomial projection rather broad in lateral view, bearing 1 strong spine at distodorsal corner.

Chelipeds with coxa in male bearing small spine on mesiodistal margin. Ventral margin of ischium usually bearing 1 strong spine, occasionally 2. Merus with row of 4–5 strong spines on ventral margin, distal ones sometimes diminishing in length, subdistal dorsal spine reaching level of postocular spine. Carpus trigonal, shallow longitudinal groove laterally, strong spine at anterior ventrolateral corner preceded by 1–3 spines (sometimes worn or suppressed); mesiodorsal crest of 5–7 almost uniform moderate spines leading to prominent spine on anterior margin, short strong dorsal spine or pair of unequal spines near articulation with merus partly obscured by setae; 2–3 strong spines on anterodorsal margin mesial to articulation with propodus; strong spine near middle of anteromesial margin, nearly equal spine dorsal to it, and very strong spine near distoventral corner. Chl about 1.8 times chh in male, about 2.5 times in female; spineless dorsal ridge with erect dorsal spine or pair of spines near its proximal end; mesiodorsal row of strong spines, more erect proximally than distally and sometimes irregular in size and position, those on female variable in size and becoming obsolescent distally; strong spine below lateral dactylar condyle, reinforced distal margin below mesial dactylar condyle bearing spine and 3–4 rounded spines below it in fully adult male, less well developed in female and immature male; mesial palmar surface bearing arched upper row of obsolescent spines, and male with irregular lower row of spines in proximal (obsolescent in female), ventral keel bearing row of 3–4 spines proximal to base of fixed finger, low transversely arcuate beaded ridge near proximomesial corner. Fixed finger shorter than dactyl and more slender, continuing contour of lower margin of palm, although slightly bowed ventrally, and tapering to strong rounded tip in male, slender acute tip in female, 3–7 small teeth on proximal prehensile edge. Dactyl tip in male (rarely corneous) preceded on prehensile edge by tooth at length opposing tip of fixed finger, then row of about 5 closely crowded ragged teeth ending proximally in larger tooth at proximal of length (sometimes only few large teeth in this row), and toothless section basally; arched extensor surface bearing rows of closely crowded beaded granules separated by grooves and/or dense setae, 1–2 dorsal spines or tubercles proximally but row becoming obsolescent distally, rows of similar beaded granules on mesial and submesial surfaces; corneous tip in female preceded by slightly curved prehensile edge, strong tooth at length opposing tip of fixed finger, proximal to this a section with obscure small teeth, large tooth at length, and toothless section basally.

P2 reaching about to distal of palm; carpus with distodorsal spine and tiny acute or obsolescent subdistal ventral spine; merus with slender subdistal dorsal spine and strong proximal mesioventral spine; coxa with 2 acute spines of variable strength on mesial aspect. Merus of P3 with cluster of spines and spiniform granules ventrolaterally on proximal , and strong distodorsal spine; coxa with low spine lateral to gonopore and minute spine on distomesial margin. P4 usually with spineless merus, rarely with 2 tiny lateral spines near ischium.

U with spine on protopod above base of mesial ramus; mesial rib of lateral ramus bearing an often blunt spine proximally; distal margin of rami bearing no granules.

MEASUREMENTS (in mm).—Holotype , acl 8.2, cl 12.3, chl 6.9, chh 3.7.

KNOWN RANGE.—Known only from the material examined.