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OONOPIDAE SPECIES DESCRIPTION
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Ischnothyreus digitus       Get publication



            Male (PBI_OON 25965). Total length 1.58. CEPHALOTHORAX: Carapace pale orange, with dark brown egg-shaped patches behind eyes, broadly oval 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 finely reticulate, sides finely reticulate, thorax without depressions, fovea absent, specimen bleached white, 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 needle-like, present, scattered; non-marginal pars thoracica setae absent; marginal setae absent. 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, needle-like. Eyes six, well developed, ALE largest, ALE circular, PME circular, PLE oval; posterior eye row procurved from both above and front; ALE touching, ALE-PLE touching, PME touching throughout most of their length, PLE-PME touching. Sternum longer than wide, 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, lateral margin without infra-coxal grooves, distance between coxae approximately equal, extensions of pre-coxal triangles present, lateral margins unmodified, without posterior hump; setae sparse, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae straight, anterior face unmodified; promargin with two teeth, retromargin without teeth; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae needle-like, evenly scattered; paturon inner margin with scattered setae, distal region unmodified, posterior surface unmodified, promargin unmodified, inner margin with medial denticles, laminate groove absent. Labium elongated hexagon, not fused to sternum, anterior margin 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, cuticular outgrowths near pedicel absent. Dorsal scutum weakly sclerotized, pale orange, without color pattern, covering more than 3/4 of abdomen, more than 1/2 to most of 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. Postepigastric scutum weakly sclerotized, fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes, bleached specimen. scutum not visible. Dorsum setae present, needle-like. Epigastric area setae uniform, needle-like. Postepigastric area setae present, needle-like. Spinneret scutum with fringe of needle-like setae. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. LEGS: without color pattern; femur IV not thickened, same size as femora I-III, patella plus tibia I shorter than carapace. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-2-1; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0; (leg I: distal spine of femora much smaller than medial spines. ). Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Compound microscope; tibia: each with three; metatarsus: each with one. GENITALIA: Epigastric region with sperm pore large, triangular with rounded angles, situated at level of anterior spiracles, unmodified; furrow without omega-shaped insertions, without setae. Palp normal size, strongly sclerotized, right and left palps symmetrical, proximal segments dark red-brown; embolus dark; trochanter normal size, with ventral projection; femur normal size, shorter than trochanter, without posteriorly rounded lateral dilation, attaching to patella basally; patella shorter than femur, not enlarged, without prolateral row of ridges, setae unmodified; tibia trichobothria with 3 trichobothria; cymbium dark red-brown, ovoid in dorsal view, 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 dark red-brown, more than 2 times as long as cymbium, stout, tapering apically.

            Female (PBI_OON 5676). Total length 1.62. As in male except as noted. CEPHALOTHORAX: Carapace yellow-brown, without any pattern, ovoid in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less; non-marginal pars cephalica setae dark. Clypeus straight in front view, low, ALE separated from edge of carapace by less than their radius; setae dark. Sternum pale orange; setae dark. Mouthparts: Chelicerae, endites and labium pale orange. setae dark. Endites anteromedian tip unmodified. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: dorsum soft portions pale orange. Pedicel scutum not extending far dorsal of pedicel. Dorsal scutum yellow-brown, covering 1/2 to 3/4 of abdomen, between 1/4 and 1/2 abdomen width. Epigastric scutum small lateral sclerites present, without lateral joints. Postepigastric scutum pale orange, widely hexagonal, only around epigastric furrow, not fused to epigastric scutum, with short posteriorly directed lateral apodemes. Spinneret scutum present, incomplete ring. Dorsum setae dark. Epigastric area dark. Postepigastric area setae dark. Dense patch of setae anterior to spinnerets present. Colulus present. LEGS: pale orange. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-2-1; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0; (leg I: distal spine of femora much smaller than medial spines. two very small spines on retrolateral side of femora. ). Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Compound microscope.
 

DISTRIBUTION

AUSTRALIA
Ischnothyreus digitus 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 digitus, Discover Life Map
 

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 00025965  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, via Julatten  1 Adult Male  Holotype    -16.61666; 145.33333  rainforest, Leaf Litter  11 Oct 1980  G. Monteith  QM 
PBI_OON 00005677  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, Julatten  1 Adult Female      -16.57638; 145.36611  rainforest, Leaf Litter  03 Apr 2009  K. Edward & J. Waldock  QM 
PBI_OON 00005560  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, Julatten  1 Adult Female      -16.57638; 145.36611  rainforest, Leaf Litter  03 Apr 2009  K. Edward & J. Waldock  QM 
PBI_OON 00026310  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, Julatten  1 Adult Female      -16.57638; 145.36611  rainforest, Leaf Litter  03 Apr 2009  K. Edward & J. Waldock  QM 
PBI_OON 00005676  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, Julatten  1 Adult Female  Paratype    -16.57638; 145.36611  rainforest alongside creek, moist litter  03 Apr 2009  K. Edward & J. Waldock  QM 
  AUSTRALIA  Queensland  N. E. Queensland  Clacherty Rd, via Julatten  2 Mixed  Paratype    -16.61666; 145.33333  rainforest, Leaf Litter  11 Oct 1980  G. Monteith  QM 
PBI_OON 00025946  AUSTRALIA  Queensland    Rex Lookout, via Mossman  1 Adult Male      -16.41667; 145.33330  rainforest, Leaf Litter  13 Oct 1980  G. Monteith  QM 
PBI_OON 00021729  AUSTRALIA  Queensland    Mossman Gorge NP  1 Adult Female      -16.47167; 145.33330  rainforest  22 Jul 1992  R. Raven, P. Lawless, E. Lawless, M. Shaw  QM 
PBI_OON 00025945  AUSTRALIA  Queensland    Mossman Gorge NP  1 Adult Female      -16.47167; 145.33330  rainforest, Leaf Litter  20 Oct 1980  G. Monteith  QM 


 
 
 
 
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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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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