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OONOPIDAE SPECIES DESCRIPTION
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Ischnothyreus flabellifer       Get publication



            Male (PBI_OON 16067). Total length 2.03. CEPHALOTHORAX: Carapace pale orange, with dark brown egg-shaped patches behind eyes, ovoid in dorsal view, pars cephalica strongly elevated in lateral view, anteriorly narrowed to between 0.5 and 0.75 times its maximum width, with rounded posterolateral corners, posterolateral edge without pits, posterior margin not bulging below posterior rim, anterolateral corners without extension or projections, posterolateral surface without spikes, surface of elevated portion of pars cephalica smooth, sides finely reticulate, thorax without depressions, fovea absent, 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, curved downwards 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, all subequal, ALE circular, PME oval, PLE oval; posterior eye row straight from above, procurved from front; ALE separated by less than their radius, ALE-PLE touching, 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 not extending posteriorly of coxae IV, anterior corner unmodified, distance between coxae approximately equal, extensions of pre-coxal triangles present, lateral margins unmodified, without posterior hump; setae abundant, light, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified, process at base of fangs fan-like. Two denticles enlarged; fangs directed posteriorly, 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, not fused to sternum, anterior margin not indented at middle, same as sternum in sclerotization; with 3-5 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. 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, pale orange, 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, covering about 1/3 of the abdominal length, not fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Spinneret scutum absent. Supra-anal scutum absent. Dorsum setae present, light, needle-like. Epigastric area setae uniform, light, needle-like. Postepigastric area setae present, light, needle-like. Spinneret scutum with fringe of needle-like setae. Dense patch of setae anterior to spinnerets present. Interscutal membrane with setae. Colulus represented only by setae. LEGS: pale orange, without color pattern; femur IV not thickened, same size as femora I-III, patella plus tibia I shorter 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 p0-1-2; r0-1-0; II p0-1-1; tibiae: I p2-1-1; r2-1-1; II p2-1-1; r3-1-1; metatarsi: I, II p1-1-0; r1-1-0. 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, unmodified; furrow without omega-shaped insertions. Palp normal size, strongly sclerotized, right and left palps symmetrical, proximal segments almost black; embolus dark, short, pointed; trochanter normal size, with ventral projection, ventral projection small; 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, not extending beyond distal tip of bulb, plumose setae absent, without stout setae, without distal patch of setae; bulb almost black, more than 2 times as long as cymbium, stout, tapering apically, middle part with double ventral protuberance, distal part lobe on ventral side, apex short, blunt, with complicated outgrowths.
Ischnothyreus flabellifer, male habitus, dorsal view (image by YK, specimen ID: ---16067)

ischnflabemphabd16067YK.tif

Ischnothyreus flabellifer, male habitus, ventral view (image by YK, specimen ID: ---16067)

ischnflabemphabv16067YK.tif

Ischnothyreus flabellifer, male habitus, lateral view (image by YK, specimen ID: ---16067)

ischnflabemphabl16067YK.tif

Ischnothyreus flabellifer, male carapace, dorsal view (image by YK, specimen ID: ---16067)

ischnflabempcard16067YK.tif

Ischnothyreus flabellifer, male carapace, ventral view (image by YK, specimen ID: ---16067)

ischnflabempcarv16067YK.tif

Ischnothyreus flabellifer, male carapace, anterior view (image by YK, specimen ID: ---16067)

ischnflabempcara16067YK.tif

Ischnothyreus flabellifer, male chelicerae, prolateral view (image by YK, specimen ID: ---16067)

ischnflabempchep16067YK.tif

Ischnothyreus flabellifer, male chelicerae, retrolateral view (image by YK, specimen ID: ---16067)

ischnflabempcher16067YK.tif

Ischnothyreus flabellifer, male palp, retrolateral view (image by YK, specimen ID: ---16067)

ischnflabemppalr16067YK.tif

Ischnothyreus flabellifer, male palp, retrolateral view (image by YK, specimen ID: ---16067)

ischnflabemdpalr16067YK.tif

Ischnothyreus flabellifer, male bulb, prolateral view (image by YK, specimen ID: ---16067)

ischnflabemdbulp16067YK.tif

Ischnothyreus flabellifer, male carapace, lateral view (image by YK, specimen ID: ---16067)

ischnflabempcarl16067YK.tif

Ischnothyreus flabellifer, male chelicerae, prolateral view (image by YK, specimen ID: ---16067)

ischnflabemdchep16067YK.tif

Ischnothyreus flabellifer, male palp, prolateral view (image by YK, specimen ID: ---16067)

ischnflabemdpalp16067YK.tif

Ischnothyreus flabellifer, male palp, prolateral view (image by YK, specimen ID: ---16067)

ischnflabemppalp16067YK.tif


            Female (PBI_OON 16067). Total length 2.97. As in male except as noted. CEPHALOTHORAX: Carapace without any pattern, broadly oval in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less. Mouthparts: fangs without prominent basal process. Endites anteromedian tip unmodified. Female palp claws absent; spines present, formula: femur v2-1-2; tarsus unmodified; trichobothria tibia with three trichobothria. ABDOMEN: Dorsal scutum covering less than 1/2 of abdomen, not fused to epigastric scutum. Epigastric scutum slightly protuding. Postepigastric scutum widely hexagonal, with short posteriorly directed lateral apodemes. Spinneret scutum present, incomplete ring. LEGS: patella plus tibia I longer than carapace. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-1-2; r0-1-0; II p0-1-1; 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 hairs. In the middle of the slightly thickened margin of the postepigastric scutum starts a dark strongly winding tube running posteriorly.
Ischnothyreus flabellifer, female habitus, dorsal view (image by YK, specimen ID: ---16067)

ischnflabefphabd16067YK.tif

Ischnothyreus flabellifer, female habitus, ventral view (image by YK, specimen ID: ---16067)

ischnflabefphabv16067YK.tif

Ischnothyreus flabellifer, female habitus, lateral view (image by YK, specimen ID: ---16067)

ischnflabefphabl16067YK.tif

Ischnothyreus flabellifer, female carapace, dorsal view (image by YK, specimen ID: ---16067)

ischnflabefpcard16067YK.tif

Ischnothyreus flabellifer, female carapace, ventral view (image by YK, specimen ID: ---16067)

ischnflabefpcarv16067YK.tif

Ischnothyreus flabellifer, female carapace, anterior view (image by YK, specimen ID: ---16067)

ischnflabefpcara16067YK.tif

Ischnothyreus flabellifer, female abdomen, ventral view (image by YK, specimen ID: ---16067)

ischnflabefpabdv16067YK.tif

Ischnothyreus flabellifer, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---16067)

ischnflabefpepiv16067YK.tif

Ischnothyreus flabellifer, female carapace, lateral view (image by YK, specimen ID: ---16067)

ischnflabefpcarl16067YK.tif

Ischnothyreus flabellifer, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---16067)

ischnflabefdepid16067YK.tif

Ischnothyreus flabellifer, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---16067)

ischnflabefdepiv16067YK.tif

Ischnothyreus flabellifer, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---16067)

ischnflabefpepid16067YK.tif

Ischnothyreus flabellifer, female palp, prolateral view (image by YK, specimen ID: ---16067)

ischnflabefppalp16067YK.tif

 

DISTRIBUTION

MALAYSIA
Ischnothyreus flabellifer 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 00016067  MALAYSIA  Sabah    Kinabalu National Park  1 Adult Male  Holotype  1550  6.16866; 116.64991    23 Jul 1980  C.L. Deeleman and P.R. Deeleman  RMNH 
PBI_OON 00032195  MALAYSIA  Sabah    Kinabalu National Park  1 Adult Female  Paratype  1550  6.16866; 116.64991    23 Jul 1980  C.L. Deeleman and P.R. Deeleman  RMNH 


 
 
 
 
The American Museum of Natural History, New York, in collaboration with
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The Field Museum of Natural History, Chicago   George Washington University, Washington DC
 
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