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



            Male (PBI_OON 21981). Total length 1.43. 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 strongly reticulate, thorax without depressions, fovea absent, 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 dark, 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, low, ALE separated from edge of carapace by less than their radius, median projection absent; setae present, dark, needle-like. Eyes six, well developed, ALE largest, ALE circular, PME oval, PLE oval; posterior eye row straight from above, procurved from front; ALE touching, 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, 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, dark, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified; promargin with one tooth, retromargin without teeth; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae dark, 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 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 1/2 to 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, yellow, short, almost rectangular, covering about 1/2 of abdominal length, fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Dorsum setae present, dark, needle-like. Epigastric area setae uniform, dark, needle-like. Postepigastric area setae present, dark, needle-like. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. LEGS: white, 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 p0-2-0; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0. 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 with pair of 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 about as long as femur, not enlarged, without prolateral row of ridges, setae unmodified; tibia trichobothria with 2 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.
Ischnothyreus barratus, male carapace, anterior view (image by KE, specimen ID: ---21981)

ischnbarrampcara21981KE.tif

Ischnothyreus barratus, male habitus, dorsal view (image by KE, specimen ID: ---21981)

ischnbarramphabd21981KE.tif

Ischnothyreus barratus, male habitus, lateral view (image by KE, specimen ID: ---21981)

ischnbarramphabl21981KE.tif

Ischnothyreus barratus, male sternum, ventral view (image by KE, specimen ID: ---21981)

ischnbarrampstev21981KE.tif

Ischnothyreus barratus, male chelicerae, anterior view (image by KE, specimen ID: ---21981)

ischnbarramdchea21981KE.tif

Ischnothyreus barratus, male chelicerae, posterior view (image by KE, specimen ID: ---21981)

ischnbarramdcheT21981KE.tif

Ischnothyreus barratus, male palp, dorsal view (image by KE, specimen ID: ---21981)

ischnbarramdpald21981KE.tif

Ischnothyreus barratus, male palp, retrolateral view (image by KE, specimen ID: ---21981)

ischnbarramdpalr21981KE.tif


            Female (PBI_OON 21734). Total length 1.58. As in male except as noted. CEPHALOTHORAX: Carapace without any pattern, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less. Endites anteromedian tip unmodified. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: Pedicel scutum not extending far dorsal of pedicel. Dorsal scutum between 1/4 and 1/2 abdomen width. Epigastric scutum small lateral sclerites present, without lateral joints. Postepigastric scutum pale orange, widely hexagonal, with short posteriorly directed lateral apodemes. Spinneret scutum with fringe of needle-like setae. Dense patch of setae anterior to spinnerets present. LEGS: Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-2-0; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0. Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Compound microscope.
Ischnothyreus barratus, female epigynum, epigynal area, ventral view (image by KE, specimen ID: ---21734)

ischnbarrafpepiv21734KE.tif

Ischnothyreus barratus, female habitus, dorsal view (image by KE, specimen ID: ---21734)

ischnbarrafphabd21734KE.tif

Ischnothyreus barratus, female habitus, lateral view (image by KE, specimen ID: ---21734)

ischnbarrafphabl21734KE.tif

Ischnothyreus barratus, female habitus, ventral view (image by KE, specimen ID: ---21734)

ischnbarrafphabv21734KE.tif

Ischnothyreus barratus, female epigynum, epigynal area, ventral view (image by KE, specimen ID: ---21734)

ischnbarrafdepiv21734KE.tif

 

DISTRIBUTION

AUSTRALIA
Ischnothyreus barratus 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 barratus, 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 00005855  AUSTRALIA  Queensland    Mission Beach  1 Adult Male    20  -17.52000; 146.05000    29 Jan 1996  Cermak, M.  ANIC 
PBI_OON 00021717  AUSTRALIA  Queensland    Ella Bay NP (NQ 10)  1 Adult Male      -17.48334; 146.07170  rainforest  24 Jul 1992  R. Raven, P. Lawless, E. Lawless, M. Shaw  QM 
PBI_OON 00025827  AUSTRALIA  Queensland    Hinchinbrook Island, Missionary Bay  3 Mixed      -18.23333; 146.21666  rainforest, Leaf Litter  10 Jul 1977  R.W. Taylor  ANIC 
PBI_OON 00022229  AUSTRALIA  Queensland    Polly Ck, (Hasenpusch property)  1 Adult Male    50  -17.46667; 146.01670  rainforest  25 Nov 1994  G. Monteith, J. Hasenpusch  QM 
PBI_OON 00025826  AUSTRALIA  Queensland    Hinchinbrook Island, Missionary Bay  4 Mixed      -18.23333; 146.21666  rainforest, Leaf Litter  10 Jul 1977  R.W. Taylor  ANIC 
PBI_OON 00025828  AUSTRALIA  Queensland    Hinchinbrook Island, Missionary Bay  2 Adult Male      -18.23333; 146.21666  rainforest, Leaf Litter  10 Jul 1977  R.W. Taylor  ANIC 
PBI_OON 00022249  AUSTRALIA  Queensland    Palm Island, site 1  1 Adult Female    450  -18.73800; 146.58920  rainforest, Leaf Litter  20 Feb 2001  G. Monteith  QM 
PBI_OON 00021981  AUSTRALIA  Queensland    Mt Elliot NP, Upper North Ck  1 Adult Male  Holotype  1000  -19.48334; 146.96670  rainforest, Leaf Litter  03 Dec 1986  G. Monteith, G. Thompson, D. Hamlet  QM 
PBI_OON 00025824  AUSTRALIA  Queensland    Hinchinbrook Island, Bowen Creek  1 Adult Female      -18.30000; 146.23333  rainforest, Leaf Litter  11 Jul 1977  R.W. Taylor  ANIC 
PBI_OON 00022158  AUSTRALIA  Queensland    Mt Elliot NP, Upper North Ck  8 Adult Female    1000  -19.48334; 146.96670  rainforest  03 Dec 1986  G. Monteith, G. Thompson, D. Hamlet  QM 
PBI_OON 00021734  AUSTRALIA  Queensland    Mt Elliot NP, summit  1 Adult Female  Paratype  1150  -19.48334; 146.96670  fern glade, Leaf Litter  01 Jan 1900  A. Graham  QM 
PBI_OON 00022212  AUSTRALIA  Queensland    Hinchinbrook Is, Gayundah Creek  1 Adult Male    10  -18.35983; 146.21820  rainforest  08 Nov 1984  V. Davies, J. Gallon  QM 
PBI_OON 00025825  AUSTRALIA  Queensland    Hinchinbrook Island, Missionary Bay  4 Mixed      -18.23333; 146.21666  rainforest, Leaf Litter  10 Jul 1977  R.W. Taylor  ANIC 


 
 
 
 
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