152 
each as long as flagellum, articles 2 and 3 half the length, proximal 
article short, all covered with sensory spines and tricorn-like setae 
(Fig. 9, An2). 
Mandible. Molar penicil with about 7 branches, pars intermedia 
with coniform setae, and two penicils on left, one on right side, 
additional plumose seta proximally (Fig. 10, Mdl/r). 
Maxillula. Medial endite with two stout penicils and small subapi- 
cal tip, lateral endite with 4+6 teeth apically, 5 of inner set cleft, one 
of those double-cleft, two subapical teeth caudally, hyline lobe very 
slender (Fig. 10, Mx1). 
Maxilla. Lateral endite broader than medial, covered with pecti- 
nate scales, medial lobe with denser setation, apex with about 15 
cusps, setal tuft individualized (Fig. 10, Mx2). 
Maxilliped. basipodite with sulcus lateralis and many tricorn-like 
seate, palp with medial and proximal setal tuft stalked, proximal 
more indistinctively, proximal article with long and very short seta 
(Fig. 10, Mxp). 
Pereopods. Slender, as in other species of the genus (Fig. 11, 
PE4~7; Fig. 12, PE1), dactylus with long inner claw and apically 
plumose dactylar seta (Fig. 11, Dac), antenna-grooming devices on 
propus and carpus | (Fig. 12, PE1). Sexual differentiation. All 
pereopods sexually differentiated: pereopod 1 to 3 with enlarged 
carpus bearing setal fields rostrally, enlargement gradually de- 
creasing from 1 to 3, merus and propus with setal brushes, too. 
Pereopod 4 with scattered setae on medial margin of carpus and 
merus, pereopod 5 with setal field medio-proximally on merus, 
ischium with four stout sensory spines medially. Pereopod 6 merus 
with prominent hump medio-proximally, ischium with two stout 
sensory spines medially, pereopod 7 merus with long proximal 
sensory spine and four along medial margin, ischium as in other 
species in the variegata-group, i. e. a prominent medial brush, a 
distal lobe and a rostral depression. 
Pleopods. Pleopod endopodites slightly bilobate, exopodites with 
about 10 sensory spines laterally, medially distinctly covered with 
trichiae, exopodite 5 with creel of three rows of pectinate scales, 
distal ones parallel, proximal one diverging, protopodite 3 to 5 with 
slightly setose medial protrusion, laterally no rudimental epipodites, 
only few trichiae (Fig. 12, PL1—5). Sexual differentiation. Male 
pleopod | exopodite obtuse triangular, lateral point recurved, inci- 
sion with transverse folding proximally on caudal side, endopodite 
straight, apex obtuse, rostrally with 5 to 6 teeth, caudally with tuft of 
hyaline trichiae, lateral row of spines present. Pleopod 2 exopodite 
elongate with sinuous lateral margin bearing 11 sensory spines, 
medially with trichiae, endopodite with truncate apex, bearing some 
faint granules caudally. 
Uropod. Exopodite and endopodite subequal in length. 
Genital papilla. Ventral shield slightly surpassing terminal spatula 
(Fig. 12, Gen). 
ETYMOLOGY. 
tegument. 
The specific name refers to the colourful dorsal 
Ischioscia pariae sp.nov. 
Figs 13-16 
MATERIAL EXAMINED. Holotype, male (body length 10 mm): 
Peninsula de Paria, E] Refugio de la Cerbatana, primary forest 
with high trees covered with Brypohyta, Bromeliaceae, Lyco- 
podiaceae, vines, very humid, in leaf litter, leg. C. Schmidt 
04.04.1998. Paratypes: 4 males, 6 females, 7 immatures: same 
data as holotype; 7 males, 7 females (with marsupium), 8 females: 
Peninsula de Paria, El Rincén, 10°35.94' N 63°11.81' W, small 
brook, water only in upper half, humid forest, lower part in coacoa 
A. LEISTIKOW 
plantation, with some very high Bombacaceae, near small well, 
leg. C. Schmidt 09.04.1998. 
DESCRIPTION 
Colour. Basic colour chestnut, prominent light patches on medial 
line of tergites and coxal plates, between them smaller irregular 
patches, caudal patches on median line dark umber, pleon chestnut 
with white patches in medial line, cephalothorax covered with small 
white spots, representing muscle insertions. 
Cephalothorax. Linea supra-antennalis prominent, linea frontalis 
lacking, with lamina frontalis, vertex flat, covered with some setae, 
compound eyes consisting of 25 ommatidia in 4 rows (Fig. 13, Ctf). 
Pereon. Tegument rather smooth and shiny, coxal plates 1 to 3 
rounded, coxal plates 4 to 7 caudally pointed, no noduli laterales nor 
gland pores discernible, sulcus marginalis present. 
Pleon. Retracted from pereon, pleonites 3 to 5 with small 
neopleurae, pleotelson with concave margins, densely covered with 
small cuticle-covered sensilla. 
Antennula. As in other species of genus, differing in position of 
aesthetascs on distal article, which are inserted at almost entire 
medial margin (Fig. 13, An1). 
Antenna. Peduncle rather long with typical length ratio of other 
members of the genus, flagellum with proximal article longest, of 
half length of flagellum, apical organ longer than medial article (Fig. 
13, An2). 
Mandible. Molar penicil composed of about 7 branches, additional 
plumose seta long, pars intermedia with two penicils on left and one 
on right mandible, coniform setae on both sides (fig. 14, Mdl/r). 
Maxillula. Medial endite with two stout penicils and small sub- 
apical tip, lateral endite bearing 4+6 teeth apically, five of inner set 
cleft, on caudal side with hyaline lobe, stalk and two slender 
subapical teeth, laterally fringed with trichiae (Fig. 14, Mx1). 
Maxilla. Lateral lobe slightly broader than medial one, covered 
with pectinate scales and faint trichiae, medial lobe densely covered 
with trichiae, apically with about 15 cusps (Fig. 14, Mx2). 
Maxilliped. Basipodite with sulcus lateralis, palp with one seta on 
proximal article, medial article with two setal tufts, distal one stalked, 
distal article with prominent setal tuft, endite caudally setose with 
two teeth, rostrally with prominent penicil (Fig. 14, Mxp). 
Pereopods. Pereopod 1 carpus and propus with antenna-grooming 
brushes (Fig. 15, PE2—7; Fig. 16, PE1), dactylus with a hyaline 
cuticular scale laterally of main claw, inner claw long, dactylar seta 
with an enlarged apex, subapically some plumules (Fig. 15, Dac). 
Sexual differentiation. Male pereopods 1 to 3 with enlarged carpus 
and prominent setal fields rostrally, carpus 2 and 3 only slightly 
enlarged, merus | to 3 with medial setal field, setal field present on 
propus 2, too. Pereopod 7 ischium with distal lobe, sparsely covered 
with trichiae, setal brush on medio-proximal half slightly directed 
rostrodistally, more laterally accompanied by a prominent groove 
extending to the lateral margin, two sensory spines on lateral 
margin. 
Pleopods. Endopodites more rectangular and exopodites more 
triangular as in preceding species, especially in pleopod 5, laterally 
bearing 6 to 8 sensory spines, protopodite 3 to 5 lacking rudimental 
epipodites (Fig. 16, PL1—5). Sexual differentiation. Pleopod exopodite 
triangular with rounded medial edge and slighly sinuous medial 
margin, almost continued by lateral protrusion, incision proximally 
bordered by a step-like additional tip, endopodite straight, apically 
pointed with small lateral protrusion subapically, caudolateral row of 
minute spines, single prominent spine apically. Pleopod 2 with only 
slightly sinuous lateral margin bearing 8 sensory spines, endopodite 
with apex shaped like a hypodermal needle. 
Uropod. Exopodites rather long (Fig.13, UR). 
