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



            Male (PBI_OON 12470). Total length 1.53. CEPHALOTHORAX: Carapace orange-brown, with dark brown egg-shaped patches behind eyes, broadly oval in dorsal view, pars cephalica domed 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 strongly reticulate, sides strongly reticulate, thorax without depressions, fovea absent, reticulation of the surface covering almost whole carapace. Only the most upper part of the carapace is smooth, 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 strongly rebordered, straight in front view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more, median projection absent, margin of clypeus very broad; 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 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 approximately equal, extensions of pre-coxal triangles present, lateral margins unmodified, without posterior hump, anterior margin of sternum more densely covered with needle-like hairs than rest of sternum; 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, with anteriorly directed process at base of fangs and brush on retromargin; fangs without tooth-like projections, 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 indented at middle, same as sternum in sclerotization, laterally extended into slightly darker knobs; 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. Book lung covers large, elliptical, without setae, anterolateral edge unmodified. Posterior spiracles not connected by groove. Pedicel tube medium, ribbed, scuto-pedicel region unmodified, scutum extending far dorsal of pedicel, plumose hairs absent, matted setae on anterior ventral abdomen in pedicel area absent, scutum dorsal of pedicel striated. Dorsal scutum strongly sclerotized, pale orange, covering full length of abdomen, no soft tissue visible from above, not fused to epigastric scutum, middle surface striated, sides striated, anterior half without projecting denticles, anterior and posterior parts are darkened. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent. Postepigastric scutum strongly sclerotized, pale orange, long, almost rectangular, covering about 3/4 of abdominal length, fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Spinneret 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 long setae. Dense patch of setae anterior to spinnerets absent. 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 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; r0-1-0; 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, without setae. Palp normal size, strongly sclerotized, right and left palps symmetrical, proximal segments brown; embolus light, embolus not clearly descernible; trochanter normal size, unmodified; 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 brown, ovoid in dorsal view, fused with bulb but with clearly defined seam between, not extending beyond distal tip of bulb; bulb brown, more than 2 times as long as cymbium, stout, tapering apically, end of bulbus enlarged with crown-shaped basis dorsally. Membraneous outgrowth laterally and collar-like membrane on retrolateral side, middle part with ventral protuberance and lobe, distal part enlarged, ribbed, crown-shaped. Membranous, beak-shaped apophysis and collar-like membrane ventrally.
Ischnothyreus mulumi, male habitus, dorsal view (image by YK, specimen ID: ---12470)

ischnmulummphabd12470YK.tif

Ischnothyreus mulumi, male habitus, ventral view (image by YK, specimen ID: ---12470)

ischnmulummphabv12470YK.tif

Ischnothyreus mulumi, male habitus, lateral view (image by YK, specimen ID: ---12470)

ischnmulummphabl12470YK.tif

Ischnothyreus mulumi, male carapace, dorsal view (image by YK, specimen ID: ---12470)

ischnmulummpcard12470YK.tif

Ischnothyreus mulumi, male carapace, ventral view (image by YK, specimen ID: ---12470)

ischnmulummpcarv12470YK.tif

Ischnothyreus mulumi, male carapace, lateral view (image by YK, specimen ID: ---12470)

ischnmulummpcarl12470YK.tif

Ischnothyreus mulumi, male carapace, anterior view (image by YK, specimen ID: ---12470)

ischnmulummpcara12470YK.tif

Ischnothyreus mulumi, male carapace, prolateral view (image by YK, specimen ID: ---12470)

ischnmulummpcarp12470YK.tif

Ischnothyreus mulumi, male abdomen, dorsal view (image by YK, specimen ID: ---12470)

ischnmulummpabdd12470YK.tif

Ischnothyreus mulumi, male abdomen, ventral view (image by YK, specimen ID: ---12470)

ischnmulummpabdv12470YK.tif

Ischnothyreus mulumi, male palp, retrolateral view (image by YK, specimen ID: ---12470)

ischnmulummppalr12470YK.tif

Ischnothyreus mulumi, male palp, retrolateral view (image by YK, specimen ID: ---12470)

ischnmulummdpalr12470YK.tif

Ischnothyreus mulumi, male bulb, prolateral view (image by YK, specimen ID: ---12470)

ischnmulummdbulp12470YK.tif

Ischnothyreus mulumi, male bulb, retrolateral view (image by YK, specimen ID: ---12470)

ischnmulummdbulr12470YK.tif

Ischnothyreus mulumi, male chelicerae, retrolateral view (image by YK, specimen ID: ---12470)

ischnmulummdcher12470YK.tif


            Female (PBI_OON 12470). Total length 1.66. As in male except as noted. CEPHALOTHORAX: Carapace without any pattern, pars cephalica strongly elevated in lateral view, reticulation of the surface covering almost whole carapace. Only the most upper part of the carapace is smooth. Clypeus margin unmodified. Sternum longer than wide, few slightly longer and thicker hairs on sternum sides. Mouthparts: Chelicerae one long hair on base of fang; fangs without prominent basal process. Labium anterior margin not indented at middle, posterior margin slightly thickened. Endites anteromedian tip unmodified. Female palp claws absent; spines present, formula: femur v1-1-1; tarsus unmodified, few long and bent hairs on tibia and tarsus. ABDOMEN: Pedicel scutum dorsal of pedicel striated. Dorsal scutum anterior and posterior parts are darkened. Epigastric scutum slightly protuding. Postepigastric scutum widely hexagonal, covering about 1/3 of the abdominal length, not fused to epigastric scutum, with short posteriorly directed lateral apodemes. Spinneret scutum present, incomplete ring. Dense patch of setae anterior to spinnerets present. LEGS: Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-1-1; r0-1-0; II p0-0-1; v0-0-1; tibiae: I, II p2-1-1; r2-1-1; metatarsi: I, II p1-1-0; r1-1-0; (leg II: the ventral spines on femora are small and weak. ). Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Stereo 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 starts a dark, thin, strongly winding tube running backwards, ending in a dark, half-circle, surrounded by numerous hairs. With curved, lateral apodemes.
Ischnothyreus mulumi, female habitus, dorsal view (image by YK, specimen ID: ---12470)

ischnmulumfphabd12470YK.tif

Ischnothyreus mulumi, female habitus, ventral view (image by YK, specimen ID: ---12470)

ischnmulumfphabv12470YK.tif

Ischnothyreus mulumi, female habitus, lateral view (image by YK, specimen ID: ---12470)

ischnmulumfphabl12470YK.tif

Ischnothyreus mulumi, female carapace, dorsal view (image by YK, specimen ID: ---12470)

ischnmulumfpcard12470YK.tif

Ischnothyreus mulumi, female carapace, ventral view (image by YK, specimen ID: ---12470)

ischnmulumfpcarv12470YK.tif

Ischnothyreus mulumi, female carapace, anterior view (image by YK, specimen ID: ---12470)

ischnmulumfpcara12470YK.tif

Ischnothyreus mulumi, female abdomen, dorsal view (image by YK, specimen ID: ---12470)

ischnmulumfpabdd12470YK.tif

Ischnothyreus mulumi, female abdomen, ventral view (image by YK, specimen ID: ---12470)

ischnmulumfpabdv12470YK.tif

Ischnothyreus mulumi, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---12470)

ischnmulumfpepiv12470YK.tif

Ischnothyreus mulumi, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---12470)

ischnmulumfdepid12470YK.tif

Ischnothyreus mulumi, female epigynum, epigynal area, ventral view (image by YK, specimen ID: ---12470)

ischnmulumfdepiv12470YK.tif

Ischnothyreus mulumi, female epigynum, epigynal area, dorsal view (image by YK, specimen ID: ---12470)

ischnmulumfpepid12470YK.tif

 

DISTRIBUTION

BRUNEI DARUSSALAM ; INDONESIA; MALAYSIA
Ischnothyreus mulumi 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 00035260  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Female    150  4.54188; 115.15500  primary mixed dipterocarp forest  03 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036304  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Female    150  4.54188; 115.15500  primary mixed dipterocarp forest  01 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036333  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Female    150  4.54188; 115.15500  primary mixed dipterocarp forest  01 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036304  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Male    150  4.54188; 115.15500  primary mixed dipterocarp forest  01 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036335  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Male    150  4.54188; 115.15500  primary mixed dipterocarp forest  04 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036325  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  1 Adult Male    150  4.54188; 115.15500  primary mixed dipterocarp forest  03 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00036326  BRUNEI DARUSSALAM  Temburong District    Ashton Trail near Kuala Belalong Field Studies Centre, 21 km SSW Bangar  2 Adult Female    150  4.54188; 115.15500  primary mixed dipterocarp forest  03 Oct 2009  C. Griswold, N. Chousou Polydouri  CAS 
PBI_OON 00031644  INDONESIA  Kalimantan Timur  Berau District  Hutan Mayang Mangurai  1 Adult Female    20  2.10361; 117.40138  secondary forest  30 Sept 2008  P. Schwendinger  MHNG 
PBI_OON 00031652  INDONESIA  Kalimantan Timur  Berau District  Hutan Wisata Sei Tangap  1 Adult Female    30  2.13444; 117.41083  primary forest  02 Oct 2008  P. Schwendinger  MHNG 
PBI_OON 00032196  MALAYSIA  Sarawak    Mulu National Park  4 Adult Female  Paratype  200  4.00000; 114.81666  primary forest  19 Aug 2003  A. Schultz  MHNG 
PBI_OON 00012470  MALAYSIA  Sarawak    Mulu National Park  1 Adult Male  Holotype  200  4.00000; 114.81666  primary forest  19 Aug 2003  A. Schultz  MHNG 


 
 
 
 
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