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OONOPIDAE SPECIES DESCRIPTION
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(Female redundant descriptions removed)
Ischnothyreus falcifer       Get publication



            Male (PBI_00016068). Total length 1.94. CEPHALOTHORAX: Carapace orange-brown, with dark brown egg-shaped patches behind eyes, broadly oval in dorsal view, pars cephalica strongly 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 without extension or projections, posterolateral surface without spikes, surface of elevated portion of pars cephalica smooth, sides finely reticulate, thorax without depressions, fovea absent, egg-shaped patches behind eyes barely visible, without radiating rows of pits; lateral margin straight, smooth, 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, ALE largest, ALE circular, PME oval, PLE circular; posterior eye row procurved from both above and front; ALE separated by less than their radius, ALE-PLE touching, PME touching throughout most of their length, PLE-PME touching. Sternum as long as 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 II and III greater than distance between coxae I and II, and coxae III and IV, extensions of pre-coxal triangles present, lateral margins unmodified, without posterior hump; setae sparse, light, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified, one of the inner margin denticles is 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 triangular, fused to sternum, anterior margin 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, orange-brown, without color pattern, covering 1/2 to 3/4 of abdomen, between 1/4 and 1/2 abdomen width, not 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, anterior margin of sperm pore with a fringe of needle-like setae. Postepigastric scutum weakly sclerotized, pale orange, short, only around epigastric furrow, fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Supra-anal scutum absent. Dorsum setae present, light, needle-like. Epigastric area setae uniform, light, needle-like. Postepigastric area setae present, light, needle-like. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. LEGS: pale orange, without color pattern; femur IV not thickened, same size as femora I-III, patella plus tibia I near as long as carapace. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-1-1; 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. 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 brown; embolus light, very long and thin, conductor long and broad, scythe-shaped. Small membranous, slightly pointed outgrowth on dorsal side; trochanter normal size, with ventral projection; femur normal size, one to two times as long as trochanter, without posteriorly rounded lateral dilation, attaching to patella basally; patella about as long as femur, not enlarged; tibia trichobothria with 3 trichobothria; cymbium brown, ovoid in dorsal view, fused with bulb but with clearly defined seam between, not extending beyond distal tip of bulb, without distal patch of setae; bulb brown, 1 to 1.5 times as long as cymbium, stout, tapering apically, with double ventral protuberance.
Ischnothyreus falcifer, male habitus, dorsal view (image by YK, specimen ID: ---16068)

ischnfalcimphabd16068YK.tif

Ischnothyreus falcifer, male habitus, ventral view (image by YK, specimen ID: ---16068)

ischnfalcimphabv16068YK.tif

Ischnothyreus falcifer, male habitus, lateral view (image by YK, specimen ID: ---16068)

ischnfalcimphabl16068YK.tif

Ischnothyreus falcifer, male carapace, dorsal view (image by YK, specimen ID: ---16068)

ischnfalcimpcard16068YK.tif

Ischnothyreus falcifer, male carapace, ventral view (image by YK, specimen ID: ---16068)

ischnfalcimpcarv16068YK.tif

Ischnothyreus falcifer, male carapace, anterior view (image by YK, specimen ID: ---16068)

ischnfalcimpcara16068YK.tif

Ischnothyreus falcifer, male palp, ventral view (image by YK, specimen ID: ---16068)

ischnfalcimppalv16068YK.tif

Ischnothyreus falcifer, male chelicerae, retrolateral view (image by YK, specimen ID: ---16068)

ischnfalcimpcher16068YK.tif

Ischnothyreus falcifer, male palp, prolateral view (image by YK, specimen ID: ---16068)

ischnfalcimppalp16068YK.tif

Ischnothyreus falcifer, male palp, prolateral view (image by YK, specimen ID: ---16068)

ischnfalcimdpalp16068YK.tif


            Female (PBI_OON 12352). Total length 2.32. As in male except as noted. CEPHALOTHORAX: Carapace without any pattern, anteriorly narrowed to between 0.5 and 0.75 times its maximum width. Clypeus low, ALE separated from edge of carapace by less than their radius. Mouthparts: fangs directed posteriorly, without prominent basal process. Labium rectangular, anterior margin not indented at middle. Endites anteromedian tip unmodified. Female palp claws absent; spines present, formula: femur v1-1-1; tarsus unmodified. ABDOMEN: dorsum soft portions pale orange. Epigastric scutum slightly protuding, small lateral sclerites present. Postepigastric scutum widely hexagonal, not fused to epigastric scutum. Spinneret scutum present, incomplete ring. Epigastric area frontal setae thickened. Spinneret scutum with fringe of needle-like setae. Dense patch of setae anterior to spinnerets present. Colulus present. LEGS: tibia IV specialized hairs on ventral apex absent, tibia IV ventral scopula absent, metatarsi I and II meso-apical comb 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; r0-0-1; II p0-0-1; tibiae: I, II p2-1-1; v2-1-1; 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; base rounded. GENITALIA: Shape: the posterior margin of the epigastric scutum is lined with numerous needle-like hairs. In the middle of the psotepigastric scutum is a roundish, can-like structure visible, a thin, dark, needle-like tube is shining trough. This tube is straight in ventral view, winding in dorsal view. Posteriorly directed apodemes present.
Ischnothyreus falcifer, female habitus, dorsal view (image by YK, specimen ID: ---12352)

ischnfalcifphabd12352YK.tif

Ischnothyreus falcifer, female habitus, ventral view (image by YK, specimen ID: ---12352)

ischnfalcifphabv12352YK.tif

Ischnothyreus falcifer, female carapace, dorsal view (image by YK, specimen ID: ---12352)

ischnfalcifpcard12352YK.tif

Ischnothyreus falcifer, female carapace, ventral view (image by YK, specimen ID: ---12352)

ischnfalcifpcarv12352YK.tif

Ischnothyreus falcifer, female carapace, anterior view (image by YK, specimen ID: ---12352)

ischnfalcifpcara12352YK.tif

Ischnothyreus falcifer, female habitus, lateral view (image by YK, specimen ID: ---12352)

ischnfalcifphabl12352YK.tif

Ischnothyreus falcifer, female abdomen, ventral view (image by YK, specimen ID: ---12352)

ischnfalcifpabdv12352YK.tif

Ischnothyreus falcifer, female epigastric area, dorsal view, ventral view (image by YK, specimen ID: ---12352)

ischnfalcifpepdv12352YK.tif

Ischnothyreus falcifer, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---12352)

ischnfalcifpepid12352YK.tif

Ischnothyreus falcifer, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---12352)

ischnfalcifpepiv12352YK.tif

 

DISTRIBUTION

BRUNEI DARUSSALAM ; MALAYSIA
Ischnothyreus falcifer coordinates
Click the following link for a map from Discover Life which displays the records below. You can click anywhere on that map to zoom in, and clicking on any point will display the full data for that locality Ischnothyreus falcifer, Discover Life Map
 

MATERIAL EXAMINED
Order by:    
PBI USI Country State Division Locality Sex Type Status Elevation(m) GPS Coordinate Habitat Collection_Date Collector Inst. Code
PBI_OON 00036332  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Male    150  4.54188; 115.15500    03 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036327  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Male    150  4.54188; 115.15500    03 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00031968  MALAYSIA  Sabah    Kinabalu National Park  1 Adult Male  Paratype  1550  6.16866; 116.64991    23 Jul 1980  C.L. Deeleman and P.R. Deeleman  RMNH 
PBI_OON 00031467  MALAYSIA  Sabah    Kinabalu National Park, Headquarter  1 Adult Male  Paratype  1850  6.20736; 116.64090    27 Jun 1979  Deeleman, Christa  RMNH 
PBI_OON 00016068  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 00031463  MALAYSIA  Sabah    Kinabalu National Park  1 Adult Female  Paratype  1550  6.16866; 116.64991  Leaf Litter  01 May 1991  C.L. Deeleman and P.R. Deeleman  RMNH 
PBI_OON 00012352  MALAYSIA  Sabah    Mt. Kinabalu  1 Adult Female  Paratype  1550  6.08333; 116.55000  Leaf Litter  29 Apr 1987  D. Burckhardt, I. Löbl  MHNG 
PBI_OON 00031968  MALAYSIA  Sabah    Kinabalu National Park  6 Adult Female  Paratype  1550  6.16866; 116.64991  Leaf Litter  23 Jul 1980  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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