Upogebia pillsbury Williams 1993

Upogebia pillsbury

MATERIAL EXAMINED.—COLOMBIA: USNM 251435,1 (holotype), Caribbean Sea off Cabo Tiburon, 08°41′N, 77°13′W, 57 m, R/V Pillsbury sta 412,40-ft otter trawl, 18 Jul 1966; USNM 251436, 1 ovig. (allotype), same; USNM 251437, 5 , 7 , (4 ovig.) (paratypes), same.

DIAGNOSIS.—Projections to either side of rostrum ending in acute spine. Multiple spines and tubercles on postocular margin. Abdominal stemites unarmed. T subrectangular. Merus of cheliped with row of spines on both dorsal and ventral margins; carpus with erect mesiodistal dorsal spine and 1 strong spine on mesiodistal margin. Merus of P2 lacking proximal mesioventral spine, but with 2 or 3 distodorsal spines, carpus with 4 or 5 dorsal spines and 1 distoventral spine. Merus of P3 with row of spines on dorsal and ventral margins; merus of P4 with cluster of ventrolateral spines and 1 dorsal spine or tubercle.

DESCRIPTION.—Rostrum linguiform, straight in lateral view, long, tip exceeding eyestalks by interval equal to their length; oblique ridge at either side of minutely granulate, rounded tip bearing 2–3 strong, erect spines curved slightly backward; median ventral keel bearing 5–6 spines curved anteroventrally. Pilose-armed field on anterior carapace arranged in row of about 10 short spines to either side of median furrow on rostrum and anterior gastric region, partly obscured by long setae, with row diverging posterolaterally on gastric region and continuing with 7–8 spines on edge of broad furrow lateral to it; gastric region with scattered small spines mesial to lateral row, but posterior region glabrous. Lateral ridge extended into process lateral to rostrum bearing crest of 8 spines on anterior , and behind interruption at level of gastric region, 8 more spines on posterior divergent part. Shoulder lateral to cervical groove bearing about 4 spines above intersection with thalassinidean line, and 8–9 spines below this juncture; thalassinidean line continuing uninterruptedly to posterior margin; gastroorbital region of carapace armed with 4 or 5 sharp spines and additional obsolescent spines; scattered spines variably developed above and below thalassinidean line between cervical and postcervical grooves, on anterior part of branchiostegite, and along ridge below hepatic groove. One or 2 postocular spines present, and other smaller variable spines on postocular margin.

Abdominal sternites unarmed.

T subrectangular, posterior margin shallowly biarcuate; slightly granular transverse proximal ridge, followed by cluster of obsolescent granules, confluent with lateral ridge at each side, bearing 1 or 2 small or obsolescent spines on anterior part and scattered obsolete spines or tubercles posteriorly; lateral margin bearing variably obsolescent granules or spines.

Eyestalk stout, horizontal, reaching midlength of rostrum; slight ventral angle in line with base of cornea and with obsolescent angle on dorsal margin, prominent terminal cornea narrower than diameter of stalk.

A1 peduncle reaching to about length of terminal article of A2 peduncle, its proximal 2 articles together slightly longer than terminal article; basal article bearing distoventral spine, middle article sometimes with ventral spine.

A2 peduncle with terminal article extending beyond tip of rostrum; article 2 bearing slender, curved, subdistal ventral spine and 2 smaller dorsal spines; third article with 2 slender curved ventral spines; moderate scale bearing anterolateral spine.

Mxp3 bearing epipod.

Epistomial projection rather broad in lateral view, bearing prominent apical spine.

Chelipeds much more massive in male than in female. Basis bearing mesial angle. Ventral margin of ischium bearing 1 spine. Merus with row of about 10 strong spines on ventral margin; about 10–12 less-erect spines on dorsal margin, except for distal 3 or 4 stronger spines reaching well beyond level of major postocular spines; an oblique row of spines leading from dorsal margin to lateral merocarpal condyle. Carpus trigonal, shallow longitudinal groove laterally, strong spine at anterior ventrolateral corner preceded by variable row of spines; mesiodorsal crest of 4–6 spines running from mesial merocarpal condyle to base of erect dorsal spine on anterior margin, short stout spine on anterodorsal margin mesial to articulation with propodus; strong spine on anteromesial margin and strong slender spine near distoventral corner. Chl about 2.5 times chh; dorsal row of 7–10 spines paralleled by mesiodorsal row of 8–10 spines more or less erect, strong proximally but becoming smaller or sometimes obsolescent distally, field of 4–8 or more scattered spines on mesiodistal surface below this; distomarginal spine below lateral and mesial dactylar condyles, extremely strong spine on distal margin ventral to mesial condyle, then row of about 10 smaller spines leading to hooked fixed finger shorter than dactyl and ending in slender tip. Dactyl hollowed on flexor surface but longitudinally ridged on extensor surface and setose, tip corneous.

P2 reaching about to distal of palm; carpus with 3–5 acute distodorsal spines and nearly equal subdistal ventral spine; merus with 2–3 slender distal spines on dorsal margin; coxa with proximal and distal raised areas mesially but no spines. Merus of P3 with 7–8 spines on ventral margin and 5–6 spines on dorsal margin, distal spines strongest; carpus with 0–2 tiny dorsal spines and ventral spine. Merus of P4 bearing 2–6 obsolescent ventrolateral spines or tubercles and 1 similar spine on middle of dorsal margin.

Two arthrobranchs arranged in 2 biserial rows of divided (rod-like) lamellae on Mxp3 and P1–4.

U with moderately acute spine on protopod above base of mesial ramus; lateral ramus with mesial rib bearing similar spine proximally; both rami exceeding telson.

MEASUREMENTS (in mm).—Holotype , acl 9.2, cl 15.0, chl 6.4, chh 3.1; allotype , same, 7.2,11.3,5.5,1.7.

KNOWN RANGE.—Confined to material examined.

MATERIAL EXAMINED.—U.S.A.: Florida: FDNR EJ67315, 1 Gulf of Mexico, Hillsborough Co., 65 mi W Egmont Key, 27°37′N, 83°58′W, 55 m, R/V Hernan Cortez Hourglass Cruise HC43, sta D, dredge, R. Presley, 1 Sep 1967; USNM 239251, (holotype), MAFLA sta 2211, 27°56′29.5″N, 83°52′59.5″W, coarse sand, 43 m, Nov 1977; USNM 239252, (allotype), same, Jul 1976; USNM 239260, 11 7 (2 ovig.), 1 juv. (paratypes), same, Jul 1975 (4 and 2 ovig. transferred to GCRL); USNM 239261, 2 , 2 ovig., 2 other frags, (paratypes), same, Jul 1976; USNM 239262, 1 ovig. (paratype), same, Feb 1978; USNM 239265, detached legs, MAFLA sta 2211, 9 Aug 1977 and Feb 1978; USNM 239253, 3 ovig and 1 probable (paratypes), MAFLA sta 2528, 29°54′58.6″N, 86°04′58.5″W, coarse sand, 37 m, Feb 1977; 1 cephalothorax, same, Sep 1977; 2 (1 ovig.) (paratypes), same, Feb 1978; USNM 239254, 3 (1 frag.) (paratypes), MAFLA sta 2531, 29°47′58.9″N, 86°09′28.9″W; coarse sand, 45 m, 7 Feb 1976; 1 juv., same, Nov 1977; USNM 239255, 1 tiny cephalothorax, MAFLA sta 2532, 29°46′N, 86°12.5′W, coarse sand, 52 m, Jul 1976; USNM 239256, 1 ovig. (paratype), MAFLA sta 2533, 29°42′59.9″N, 85°15′28.6″W, coarse sand, 67 m, 26 Sep 1975; 1 tiny juv. (paratype), same, 8 Feb 1976; USNM 239257, 1 (paratype), MAFLA sta 2534, 29°40′N, 86°17′W, coarse sand, 73 m, Jul 1976; USNM 239258, 1 juv. (paratype), MAFLA sta 2419, 29°46′59.8″N, 84°05′00.2″W, medium fine sand, 10 m, Sep 1977; USNM 239259, 1 (paratype), MAFLA sta 2313, 28°23′59.3″N, 85°15′03.0″W, clayey, sandy silt, 177 m, 20 Jan 1976; USNM 239263, 4 juvs. (2 frags.) (paratypes), MAFLA sta 2748, 27°37.2′N, 83°53.5′W, coarse sand, 50 m, Jul 1976; 1 , 2 (paratypes), same, Nov 1977; 1 juv. frags, (paratype), same, Feb 1978; USNM 239264,1 postlarva (paratype), MAFLA sta 2959, 25°40′N, 83°05′W, silty, very fine sand, 60 m, 9 Aug 1977.

DIAGNOSIS.—Rostrum elongate subtriangular, bearing strong spines. Projections to either side of rostrum ending in subapical pair of strong spines followed on each side by 5–7 acute spine. Postocular spine present. Abdominal sternites unarmed. T subrectangular, posterior margin with slight concavity. A1 and A2 peduncles each bearing irregular row of ventral spines. Merus of cheliped lacking subdistal dorsal spine, carpus with 2 very small subequal spines on anteromesial margin. Merus of P2 with proximal mesioventral spine; merus of P4 spineless.

DESCRIPTION.—Rostrum subtriangular, narrow, straight in lateral view, tip exceeding eyestalks by distance at least their length; dorsal pair of strong, subapical spines followed on each lateral margin by 5–7 strong spines, ventral midline bearing 2–3 subapical ventral spines; dorsal surface bearing spiniform tubercles arranged more or less parallel to each lateral margin and confluent with field of similar spines on anterior of cephalic region; posteriorly divergent lateral ridge bearing crest of about 8–10 spines, strongest on lateral rostral process and decreasing to obsolescence posteriorly. Shoulder flanking cervical groove bearing 1 or 2 spines below intersection with thalassinidean line; latter continued to posterior margin of carapace with slight interruption. Postocular spine present.

Abdominal sternites unarmed, tergites glabrous, very few setae on margin of pleura III–V.

T subrectangular, obsolescent transverse anterior ridge confluent with broader lateral ridge at each side, posterior margin with shallow concavity.

Eyestalk stout, concave dorsally, convex ventrally in lateral view; cornea as broad as distal diameter of stalk, directed anteriorly and laterally.

A1 peduncle reaching slightly beyond terminal article of A2 peduncle, its proximal 2 articles together slightly shorter than terminal article; uneven row of spines on ventral margin of articles 1, 2, and proximal of 3.

A2 peduncle with more than its length (terminal and distal part of penultimate article) extending beyond tip of rostrum, row of spines on ventrolateral margin of articles 1 and proximal part of 2, ventromesial spines on article 2 continued as ventral row on article 3; scale moderate, triangular, tapered to acute terminal spine; flagellum reaching beyond branchiostegite.

Mxp3 without epipod.

Epistomial projection subquadrate in lateral view, bearing 2 strong spines on anterodorsal corner.

Chelipeds with coxa bearing slender anteriorly hooked spine on posteromesial margin. Ventral margin of ischium spineless. Merus lacking subdistal dorsal spine, row of 9–11 slender variably sized and arranged spines or tubercles on ventral margin. Carpus trigonal, shallow longitudinal groove laterally, lacking submarginal spine at anterior ventrolateral corner; mesiodorsal crest of 3 moderate to strong spines behind prominent spine on anterior margin, 3 moderate spines on anterodorsal margin mesial to articulation with propodus; strong spine near middle of anteromesial margin and occasionally 1 or 2 smaller spines on margin above it, male sometimes with tubercles on proximomesial surface near anteromesial spines. Chl about 2.4 times chh in male, 5.5 times that in female; male with obsolescent dorsal ridge, mesiodorsal row of forwardly bent or hooked spines paralleling this, and on proximomesial margin beneath overhanging prominent anterodorsal spine of carpus an S-shape row of spiniform tubercles; distomarginal spine below mesial dactylar condyle, 1–3 smaller spines ventral to this on distal margin; female with lower mesial surface usually spineless, but male often with spine on ventral margin of palm about distance from proximal margin; low ridge running obliquely anteriad from heel of palm to become obsolescent at midlength. Fixed finger short, slender, slightly downcurved in middle and tapering to slender tip, 2–5 obsolescent teeth on proximal prehensile edge. Dactyl far overreaching fixed finger, setose; toothless tip corneous.

P2–5 elongate and slender. P2 reaching about to distal of palm; carpus with slender, acute distodorsal spine and similar but smaller subdistal ventral spine; merus without subdistal dorsal spine, proximal mesioventral spine succeeded distally by 5–7 spines diminishing in size along row; coxa with strong proximomesial spine. P3 with merus bearing ventral row of 5–9 spines; ischium unarmed; coxa of female with flange-like low spine lateral to gonopore. P4 with merus and ischium unarmed.

Two arthrobranchs arranged in 2 biserial rows of undivided (entire but rather rod-like) lamellae on Mxp3 and P1-4.

U with ovate lateral ramus far overreaching subtriangular mesial ramus, tiny acute spine on protopod above base of mesial ramus.

MEASUREMENTS (in mm).—Holotype , acl 6.8, cl 10.9, ch1 7.7, chh 2.8; allotype , same, 4.0, 6.8, 2.8, 0.77.

KNOWN RANGE.—Discovered in box core samples taken on the continental shelf of the northeastern Gulf of Mexico. The collections were part of a Minerals Management Service sponsored study referred to as the Mississippi-Alabama-Florida (MAFLA) Outer Continental Shelf Study. Specimens first came from 11 of the 87 MAFLA stations distributed in 9 transects that were sampled for benthic infauna. The species has been taken at stations scattered from southeast of Panama City, Florida, to west of Cape Romano in water depths ranging from 10 to 177 m.