New Crayfish Species 
75 
surfaces and sparse setae on dorsomesial surface, none stiff; distal 
margin of merus of second through fourth pereiopods with small, acute 
ventrolateral spine. Coxa of fourth pereiopod without boss, ventral 
surface punctate and with long setae; ventral membrane on coxa of 
fifth pereiopod studded with short setae. Ischium of third pereiopod 
(Fig. II) with simple hook extending past basioischial articulation by 
nearly half its length, hook opposed by vestigial tubercle on basis. 
Gonopods (Fig. IB, F, L) symmetrical (see “Diagnosis” for description). 
In addition, left gonopod length 44.9 percent of TCL (63.9% of PCL). 
Allotypic female — Differing from holotype in following respects: 
areola 4.0 times as long as wide, length 30.6 percent of TCL (43.5% 
of PCL). Tip of acumen extending to midlength of second article 
of antennular flagellum. Small acute tubercle ventrocephalic to cervical 
spine. Total carapace length 85.6 percent of abdomen length. Antennal 
scale 2.9 times longer than wide, tip of apical spine extending to 
about midlength of second article of antennular flagellum. Palm of 
right chela 1.6 times wider than deep; chela much shorter than carapace 
(ratio chela length to TCL 1.7), and 2.5 times longer than wide; mesial 
row of tubercles on palm subtended dorsally by irregular row of 6 
tubercles. Mesial surface of dactyl not bowed, opposable base not 
excised, closed fingers without proximal gape. Mesial surface of dactyl 
with ventromesial row of 4 acute but depressed tubercles. Opposable 
surface of fixed finger with row of 6 (5 on left) knoblike tubercles 
extending just distal to midlength of finger; subconical ventral tubercle 
situated just proximal to base of distal one-third of finger. Right carpus 
1.8 times as long as deep, ratio width to depth 1.2. Right merus 1.8 
times longer than deep. Right ischium with row of 4 acute tubercles 
on ventral ridge. 
Annulus ventralis (Fig. 1G) as described in “Diagnosis.” In addition, 
first pleopod well developed, extending beyond cephalic margin of 
annulus when abdomen flexed. Postannular sclerite (Fig. 1G) 3.2 times 
wider (2.9 mm) than long (0.9 mm). 
Morphotypic male, form II — Differing from holotype in following 
respects: rostrum 30.5 percent of TCL (42.7% of PCL); acumen length 
47.9 percent of rostrum length. Total carapace length 88.2 percent 
of abdomen length. Left chela (right regenerate) 2.7 times longer than 
wide; mesial margin of palm with subserrate mesial row of 7 spiniform 
tubercles, distal margin developed as eighth. Mesial surface of dactyl 
with subserrate row of 6 acute tubercles extending to about midlength 
of finger, dorsally subtended by irregular row of 5 squamous tubercles 
and ventrally by several squamous tubercles; opposable surface of 
dactyl with 4 knoblike tubercles extending to about base of distal 
