NEW SPECIES OF ISCHIOSCIA FROM VENEZUELA 
Genital papilla. Ventral shield distinctly surpassing terminal 
spatula (Fig. 16, Gen). 
ECOLOGICALNOTE. This species is capable of jumping about 5 cm. 
ETYMOLOGY. The species name refers to the distribution on 
Peninsula de Paria. 
Ischioscia guamae sp.nov. 
Figs 17-20 
MATERIAL EXAMINED. Holotype, male (body length 13 mm): Rio 
La Guama, 9°46.48' N 68°24.6' W, river valley between dry moun- 
tains, in leaf litter, leg. C. Schmidt 25.03.1998. Paratypes 1 males, 3 
females 1limmatures: same data as holotype. 
DESCRIPTION 
Colour. Ground colour chestnut with several light markings on 
cephalothorax and pereonites, coxal plates with light margins, in 
coxal plates V to VII, two light patches instead of contiguous band, 
dark chestnut spot in the mid line of pereonite I to IV caudally, pleon 
bearing several pale spots. 
Cephalothorax. Linea frontalis lacking, lamina frontalis and linea 
supra-antennalis prominent. Vertex smooth and free of setation, 
laterally protruding compound eyes composed of 22 ommatidia in 
four rows (Fig. 17, Ctf). 
Pereon. Tegument smooth and shiny, bearing scattered setae, coxal 
plates 1 to4 caudally rounded, coxal plates 5 to7 increasingly pointed, 
sulcus marginalis present, no gland pores nor noduli laterales discern- 
ible in light microscope at 400x magnification (Fig. 17, Cx3). 
Pleon. Set back from pereon despite neopleurae of pleonite 3 to 5. 
Pleotelson rather pointed, lateral margins concave, some tricorn- 
like setae apically. 
Antennula. Similar to other species of genus (Fig. 17, An1). 
Antenna. Rather short, flagellum three-articulate, with proximal 
article longest, somewhat shorter than pedunclular article 5, tricorn- 
like setae on all articles, apical organ half as long as flagellum (Fig. 
17, An2). 
Mandible. Pars intermedia with two penicils on left and one on 
right side, several coniform setae, molar penicil composed of about 
7 branches, additional plumose seta prominent (Fig. 18, Mdl/r). 
Maxillula. Medial endite with two stout penicils and very small 
subapical tip, lateral endite apically with 4+6 teeth, 4 of inner set 
cleft, 2 very slender, caudally with hyaline lobe and slender subapi- 
cal tooth (Fig. 18, Mx1). 
Maxilla. Lateral lobe boader than medial lobe, covered with faint 
trichiae and pectinate scales, medial lobe densely setose, apically 
with aboput 15 cusps (Fig. 18, Mx2). 
Maxilliped. Palp with three setal tufts medially, distal two very 
prominent, proximal article bearing long and short seta, endite with 
knob-like penicil on rostral side, caudally setose with two teeth, 
basipodite with sulcus lateralis (Fig. 18, Mxp). 
Pereopods. Slender(Fig. 19, PE1—7), with dactylus bearing plumose 
dactylar seta and long inner claw (Fig. 19, Dac), pereopod 1 carpus 
with antenna-grooming brush and ornamental sensory spine with 
hand-like apex (Fig. 19, Sc1), propus 2 with antenna-grooming comb. 
Sexual differentiation. Pereopod 1 to 3 and 7 differentiated, propus 1 
and 2, carpus and merus | to 3 with setal brush, carpus medially 
enlarged, conspicuously in pereopods | to 2, slightly in pereopod 3. 
Pereopod 7 ischium with setose medio-distal lobe, setal brush 
subproximally to halflength, no rostral depression, merus 7 of charac- 
teristic shape, 2 medio-caudal sensory spines on proximal half. 
Pleopods. Similar to other species of the genus, exopodites later- 
ally with sensory spines, medially with minute pectinate scales, no 
157 
rudimental epipodites on protopodites 3 to 5 (Fig. 20, PL1-—5). 
Sexual differentiation. Male pleopod 1 exopodite triangular with 
lateral incision bordered by lateral point and proximal protrusion, 
endopodite with wrinkeled apex and subapical lateral protrusion, 
caudal row of spines reduced, some spines on apex, two of them very 
prominent, surpassing apex. Pleopod 2 endopodite slighly sinuous 
laterally, bearing about 7 sensory spines, endopodite slighly sur- 
passing exopodite, apex pointed. 
Uropod. As in other species of the genus. 
Genital papilla. Ventral shield slighly surpassing terminal spatula 
(Fig. 20, Gen). 
ETYMOLOGY. The species name is derived from Rio La Guama, 
the type locality. 
Ischioscia trifasciata sp.nov. 
Figs 21-24 
MATERIAL EXAMINED. Holotype, male (body length 13mm), 
Rancho Grande, 10°21'N 67°41'W, in ground traps 30 cm diameter, 
leg. O. Hernandez 1995. Paratypes: several males and females: same 
data as holotype. 
DESCRIPTION 
Colour. Dorsal tegument rich chestnut with many yellowish 
patches, medial line and coxal plates dark umber brown, forming 
three bands, margin of coxal plates lighter, pleon chestnut with pairs 
of light spots on each pleonite, cephalothorax chestnut, vertex 
heavily spotted yellowish. 
Cephalothorax. As in other species of Ischioscia with large, later- 
ally protruding compound eyes composed of about 24 ommatidia, 
vertex somewhat flattened, linea frontalis lacking, linea supra- 
antennalis conspicuous, only slightly sinuous, between antennal 
sockets with prominent lamina frontalis (Fig. 21, Ctf). 
Pereon. Coxal plates of pereonite 1-3 with rounded margins, 
fourth to seventh coxal plate increasingly caudally pointed, no 
noduli laterales. Tegument smooth with only few tricorn-like setae 
(Fig. 21, Cx4). 
Pleon. Retracted from pereon, pleonites 3—5 with small neopleurae. 
Pleotelson with concave latero-distal margins, as long as protopodites 
of uropods, tricorn-like setae gathered at apex. 
Antennula. Apex of three-articulate antennula coniform, termi- 
nated by tuft of three aesthetascs, row of at least four aestethascs on 
medial border. Some hairlike setae on median article (Fig. 21, An1). 
Antenna. Peduncular articles with various sensory and tricorn-like 
setae as dense as on flagellum. Fifth article the longest, fourth 3/4 the 
length of fifth, as long as third and second together, those subequal. 
Flagellar articles subsequently shorter, together longer than fourth 
peduncular article, apical organ of same length as distal flagellar 
article (Fig. 21, An2). 
Mandible. Pars intermedia with two stout penicils on left, one on 
right mandible, proximally additional penicil, molar penicil com- 
posed of 6 to 7 branches (Fig. 22, Mdl/r). 
Maxillula. Medial endite with 2 stout penicils apically, small 
apical tip, lateral endite laterally fringed with trichiae, apically 
bearing 4+6 teeth, 5 of inner set cleft, caudally with hyaline lobe, 
stalk and two small teeth with fringed apex (Fig. 22, Mx1). 
Maxilla. Bothlobes subequal in breadth, densely covered with faint 
trichiae, medial lobe apically with about 12 cusps (Fig. 22, Mx2). 
Maxilliped. Basipodite with sulcus lateralis, endite with tooth and 
dense setation caudally, rostrally with conspicuous knob-like penicil, 
palp with proximal article bearing two unequal setae, distal articles 
fused without a groove, three setal tufts of 7 to about 25 setae, 
proximal and medial stalked (Fig. 22, Mxp). 
