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OONOPIDAE SPECIES DESCRIPTION
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Ischnothyreus rex       Get publication



            Male (PBI_OON 16064). Total length 2.94. CEPHALOTHORAX: Carapace orange-brown, with dark brown egg-shaped patches behind eyes, ovoid in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, with rounded posterolateral corners, posterolateral edge without pits, posterior margin not bulging below posterior rim, anterolateral corners with slightly sclerotized triangular projections, posterolateral surface without spikes, surface of elevated portion of pars cephalica finely reticulate, sides finely reticulate, thorax without depressions, fovea present, reticulation covering almost whole carapace, only the most upper part is smooth, without radiating rows of pits; lateral margin straight, rebordered, without denticles; plumose setae near posterior margin of pars thoracica absent; non-marginal pars cephalica setae light, needle-like, present, scattered; non-marginal pars thoracica setae light, needle-like; marginal setae light, needle-like. Clypeus margin unmodified, straight in front view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more, median projection absent; setae present, light, needle-like. Chilum absent. Eyes six, well developed, ALE largest, ALE circular, PME oval, PLE oval; posterior eye row procurved from both above and front; ALE separated by less than their radius, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME touching. Sternum longer than wide, pale orange, uniform, not fused to carapace, median concavity absent, without radial furrows between coxae I-II, II-III, III-IV, radial furrow opposite coxae III absent, surface smooth, without pits, microsculpture absent, sickle-shaped structures absent, anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, anterior corner unmodified, distance between coxae approximately equal, extensions of pre-coxal triangles present, lateral margins unmodified, without posterior hump, small dense patch of needle-like setae in the antero-middle part of the sternum. Slightly thicker and longer setae on the lateral parts of the sternum. Slightly more setae in the middle part of the sternum, directed posteriorly. Posterior margin with few long setae; setae abundant, light, needle-like, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae slightly divergent, anterior face unmodified, basal process crown-shaped, two denticles enlarged; fangs directed medially, shape normal, with prominent basal process, tip unmodified; setae light, needle-like, evenly scattered; paturon inner margin with scattered setae, distal region unmodified, inner margin with medial denticles. Labium rectangular, fused to sternum, anterior margin not indented at middle, same as sternum in sclerotization; with 6 or more setae on anterior margin, subdistal portion with unmodified setae. Endites distally not excavated, anteromedian tip with one strong, tooth-like projection, posteromedian part unmodified, same as sternum in sclerotization. ABDOMEN: ovoid, without long posterior extension, rounded posteriorly, inter-scutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions white, without color pattern. Book lung covers large, elliptical, without setae, anterolateral edge unmodified. Posterior spiracles not connected by groove. Pedicel tube short, unmodified, scuto-pedicel region unmodified, scutum extending far dorsal of pedicel, plumose hairs absent, matted setae on anterior ventral abdomen in pedicel area absent. Dorsal scutum weakly sclerotized, yellow-brown, without color pattern, covering about 1/2 of abdomen, between 1/4 and 1/2 abdomen width, fused to epigastric scutum, middle surface smooth, sides smooth, anterior half without projecting denticles. Epigastric scutum weakly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent. Postepigastric scutum weakly sclerotized, pale orange, short, almost rectangular, covering about 1/2 of abdominal length, not fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Spinneret scutum present, incomplete ring. Supra-anal scutum absent. Dorsum setae present, light, needle-like. Epigastric area setae uniform, light, needle-like, dense patch of long, needle-like setae on anterior margin of sperm pore. Postepigastric area setae present, light, needle-like. Spinneret scutum with fringe of long setae. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. Colulus present. LEGS: pale orange, without color pattern; femur IV not thickened, same size as femora I-III, patella plus tibia I longer than carapace, tibia IV specialized hairs on ventral apex absent, tibia IV ventral scopula absent, metatarsi III and IV weak ventral scopula absent. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-1-1; II p0-1-0; tibiae: I, II p2-1-1; r2-1-1; metatarsi: I, II p1-1-0; r1-1-0; (leg I: the femur of the right leg has only 1 spine prolaterally. ). Tarsi I to IV superior claws tooth not examined in detail. Tarsi I to IV without inferior claw. Trichobothria examined with Compound microscope; tibia: each with three; metatarsus: each with one. GENITALIA: Epigastric region with sperm pore large, circular, situated at level of anterior spiracles, with strongly protruding extension; furrow without omega-shaped insertions, without setae. Palp normal size, strongly sclerotized, right and left palps symmetrical, proximal segments almost black; embolus light, embolus extremly long and thin, filamentous, base of embolus with several membranous outgrowths; trochanter normal size, with ventral projection; femur normal size, one to two times as long as trochanter, attaching to patella basally; patella about as long as femur, not enlarged; tibia trichobothria with 3 trichobothria; cymbium almost black, fused with bulb but with clearly defined seam between, without stout setae, without distal patch of setae; bulb almost black, 1 to 1.5 times as long as cymbium, stout, tapering apically, middle part with ventral protuberance and lobe.
Ischnothyreus rex, male habitus, dorsal view (image by YK, specimen ID: ---16064)

ischnrex99mphabd16064YK.tif

Ischnothyreus rex, male habitus, ventral view (image by YK, specimen ID: ---16064)

ischnrex99mphabv16064YK.tif

Ischnothyreus rex, male habitus, lateral view (image by YK, specimen ID: ---16064)

ischnrex99mphabl16064YK.tif

Ischnothyreus rex, male carapace, dorsal view (image by YK, specimen ID: ---16064)

ischnrex99mpcard16064YK.tif

Ischnothyreus rex, male carapace, ventral view (image by YK, specimen ID: ---16064)

ischnrex99mpcarv16064YK.tif

Ischnothyreus rex, male carapace, lateral view (image by YK, specimen ID: ---16064)

ischnrex99mpcarl16064YK.tif

Ischnothyreus rex, male carapace, anterior view (image by YK, specimen ID: ---16064)

ischnrex99mpcara16064YK.tif

Ischnothyreus rex, male abdomen, dorsal view (image by YK, specimen ID: ---16064)

ischnrex99mpabdd16064YK.tif

Ischnothyreus rex, male abdomen, ventral view (image by YK, specimen ID: ---16064)

ischnrex99mpabdv16064YK.tif

Ischnothyreus rex, male leg I, prolateral view (image by YK, specimen ID: ---16064)

ischnrex99mple1p16064YK.tif

Ischnothyreus rex, male leg II, prolateral view (image by YK, specimen ID: ---16064)

ischnrex99mple2p16064YK.tif

Ischnothyreus rex, male chelicerae, prolateral view (image by YK, specimen ID: ---16064)

ischnrex99mpchep16064YK.tif

Ischnothyreus rex, male palp, prolateral view (image by YK, specimen ID: ---16064)

ischnrex99mppalp16064YK.tif

Ischnothyreus rex, male chelicerae, retrolateral view (image by YK, specimen ID: ---16064)

ischnrex99mdcher16064YK.tif

Ischnothyreus rex, male palp, prolateral view (image by YK, specimen ID: ---16064)

ischnrex99mdpalp16064YK.tif


            Female (PBI_OON 16065). Total length 3.62. As in male except as noted. CEPHALOTHORAX: Carapace without any pattern, broadly oval in dorsal view, reticulation covering almost whole carapace, only the most upper part is smooth. Sternum slightly thicker and longer setae on the lateral parts of the sternum. Posterior margin with few long setae; setae evenly scattered. Mouthparts: fangs directed posteriorly, without prominent basal process. Endites anteromedian tip unmodified. Female palp claws absent; spines present, formula: femur p1-1-0, r1-1-2; tarsus unmodified, end of tarsus fingerlike, spines on femora more or less ventrally positioned; trichobothria tibia with three trichobothria. ABDOMEN: pointed posteriorly. Pedicel tube medium. Dorsal scutum covering less than 1/2 of abdomen, not fused to epigastric scutum. Epigastric scutum slightly protuding, small lateral sclerites present. Postepigastric scutum widely hexagonal, only around epigastric furrow, with short posteriorly directed lateral apodemes. LEGS: Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-1-1; r0-0-2; II p0-0-1; tibiae: I, II p2-1-1; r2-1-1; metatarsi: I, II p1-1-0; r1-1-0. Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Compound microscope. GENITALIA: Shape: the posterior margin of the epigastric scutum is lined with numerous needle-like setae. The margin of the postepigastric scutum is thickened. At its middle is a y-shaped, sclerotized structure visible, whose posterior part leads to a tube. After overlapping itself, the tube runs as a circle, surrounds the y-shaped structure and finally leads to the strongly winding tube.
Ischnothyreus rex, female habitus, dorsal view (image by YK, specimen ID: ---16065)

ischnrex99fphabd16065YK.tif

Ischnothyreus rex, female habitus, ventral view (image by YK, specimen ID: ---16065)

ischnrex99fphabv16065YK.tif

Ischnothyreus rex, female habitus, lateral view (image by YK, specimen ID: ---16065)

ischnrex99fphabl16065YK.tif

Ischnothyreus rex, female carapace, dorsal view (image by YK, specimen ID: ---16065)

ischnrex99fpcard16065YK.tif

Ischnothyreus rex, female carapace, ventral view (image by YK, specimen ID: ---16065)

ischnrex99fpcarv16065YK.tif

Ischnothyreus rex, female carapace, anterior view (image by YK, specimen ID: ---16065)

ischnrex99fpcara16065YK.tif

Ischnothyreus rex, female abdomen, ventral view (image by YK, specimen ID: ---16065)

ischnrex99fpabdv16065YK.tif

Ischnothyreus rex, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---16065)

ischnrex99fpepiv16065YK.tif

Ischnothyreus rex, female palp, prolateral view (image by YK, specimen ID: ---16065)

ischnrex99fppalp16065YK.tif

Ischnothyreus rex, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---16065)

ischnrex99fpepid16065YK.tif

Ischnothyreus rex, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---16065)

ischnrex99fdepiv16065YK.tif

 

DISTRIBUTION

MALAYSIA
Ischnothyreus rex coordinates
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MATERIAL EXAMINED
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PBI USI Country State Division Locality Sex Type Status Elevation(m) GPS Coordinate Habitat Collection_Date Collector Inst. Code
PBI_OON 00016065  MALAYSIA  Sabah    Kinabalu, National Park, Powerstation  1 Adult Female  Paratype  1960  ;     04 May 1991  C.L. Deeleman and P.R. Deeleman  NHMB 
PBI_OON 00016064  MALAYSIA  Sabah    Kinabalu, National Park, Powerstation  1 Adult Male  Holotype  1960  ;     04 May 1991  C.L. Deeleman and P.R. Deeleman  RMNH 


 
 
 
 
The American Museum of Natural History, New York, in collaboration with
The California Academy of Sciences, San Francisco   The University of California, Berkeley
The Field Museum of Natural History, Chicago   George Washington University, Washington DC
 
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This material is based upon work supported by the National Science Foundation under Grant No. DEB 0613754. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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