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OONOPIDAE SPECIES DESCRIPTION
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(Female redundant descriptions removed)
Aposphragisma dayak       Get publication



            Female (PBI_OON00016222). Total length 1.69. CEPHALOTHORAX: Carapace orange-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, with rounded posterolateral corners, posterolateral edge without pits, posterior margin not bulging below posterior rim, posterolateral surface without spikes, surface of elevated portion of pars cephalica smooth, sides strongly reticulate, thorax without depressions, fovea absent, carapace margin: sluice restricted to posterior margin; denticles on carapace margin large, without radiating rows of pits; lateral margin straight, rebordered, with blunt denticles; plumose setae near posterior margin of pars thoracica absent; non-marginal pars cephalica setae light, needle-like, present in u-shaped row, setae arranged in a long u-shaped row reaching posterior edge of pars cephalica; each setae originating from the middle of a pitlike structure with partly swollen edges, especially pronounced at posterior edge of pars cephalica, where central pair of hair bases is spike-like; non-marginal pars thoracica setae absent; marginal setae light, needle-like, denticles at carapace margin represent modified hair bases; setae originating from anterior face of denticles, pointing anteriorly. Clypeus sinuous 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, a pair of long, needle-like setae on each half of the clypeus, with the inner ones being longer than the outer ones. Chilum absent. Eyes six, well developed, ALE largest, all eyes oval; posterior eye row recurved from above, procurved from 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 separated by less than PME radius. Sternum longer than wide, orange-brown, uniform, fused to carapace, median concavity absent, with radial furrows between coxae I-II, II-III, III-IV, radial furrow opposite coxae III absent, surface coarsely reticulate, without pits, microsculpture everywhere but middle, sickle-shaped structures absent, anterior margin with continuous transverse groove, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, distance between coxae approximately equal, lateral margins unmodified, without posterior hump, infra-coxal grooves present, but not possible to assess if with or without openings; radial furrows between coxae I-II, II-III and III-IV only very weakly developed, rather appearing as indentions of sternum margin; sternum microsculptures lobed, arranged in broad oval band, broad smooth margin and smooth middle-strip; sternum surface setae originating from middle of microsculptures, marginal surface originating from surface, smooth middle strip without setae; posterior edge of sternum protruding as broad single extension, covered with small blunt denticles; setae sparse, light, needle-like, evenly scattered, originating from surface. Mouthparts: Chelicerae, endites and labium orange-brown. Chelicerae straight; promargin without teeth; fangs directed posteriorly, shape normal, without prominent basal process, tip unmodified; setae light, needle-like, evenly scattered, anterior face of cheliceraes with few, rather evenly scattered setae; paturon distal region unmodified, promargin with row of flattened setae, inner margin unmodified. Labium triangular, fused to sternum, anterior margin deeply incised; subdistal portion with unmodified setae, ventral surface with 5 needle-like setae: two subdistal setae (one on each side of labium incision) and a transverse line of 3 more proximal setae. Endites distally not excavated, anteromedian tip unmodified, posteromedian part unmodified, outer margin subdistally with a pair of long setae, distally bent inwards. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. 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, elongated, rather pear-shaped, about 3x longer than wide. Posterior spiracles connected by groove. Pedicel tube short, ribbed, scuto-pedicel region with widely oval scutal ridge, scutum not extending far dorsal of pedicel, plumose hairs absent, matted setae on anterior ventral abdomen in pedicel area absent, dorsal part of epigastric scutum with subterminal ridge. Dorsal scutum strongly sclerotized, orange-brown, without color pattern, covering full length of abdomen, no soft tissue visible from above, not fused to epigastric scutum, middle surface smooth, sides smooth, anterior half without projecting denticles, surface smooth, but bases of setae appearing pitlike, giving a punctate impression. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent, without lateral joints, posterolateral part with longitudinal row of ridges. Postepigastric scutum strongly sclerotized, orange-brown, long, semicircular, covering nearly full length of abdominal length, not fused to epigastric scutum, anterior margin unmodified, with long posteriorly directed lateral apodemes. Spinneret scutum present, incomplete ring. 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 present. LEGS: pale orange, without color pattern; femur IV not thickened, same size as femora I-III, patella plus tibia I shorter than carapace, tibia I unmodified, tibia IV ventral scopula absent, metatarsi I and II meso-apical comb absent , metatarsi III and IV weak ventral scopula absent, femora in dorsal view: Femur IV recurved, Femora I-II procurved, Femur III slightly procurved, tibiae special hairs on ventral apex of tibia III & IV, metatarsi special hairs on ventral apex of metatarsi III & IV short, dagger-like, with finely serrated ridges on surface and coarsely serrated lateral margins; dorsal apex of metatarsi I-IV with small, shieldlike appendage. Leg spines absent. 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.
Aposphragisma dayak, female abdomen, lateral view (image by MT, specimen ID: ---16222)

apospdayakfpabdl16222MT.tif

Aposphragisma dayak, female abdomen, posterior view (image by MT, specimen ID: ---16222)

apospdayakfpabdT16222MT.tif

Aposphragisma dayak, female abdomen, ventral view (image by MT, specimen ID: ---16222)

apospdayakfpabdv16222MT.tif

Aposphragisma dayak, female carapace, anterior view (image by MT, specimen ID: ---16222)

apospdayakfpcara16222MT.tif

Aposphragisma dayak, female carapace, dorsal view (image by MT, specimen ID: ---16222)

apospdayakfpcard16222MT.tif

Aposphragisma dayak, female carapace, lateral view (image by MT, specimen ID: ---16222)

apospdayakfpcarl16222MT.tif

Aposphragisma dayak, female habitus, lateral view (image by MT, specimen ID: ---16222)

apospdayakfphabl16222MT.tif

Aposphragisma dayak, female habitus, dorsal view (image by MT, specimen ID: ---16222)

apospdayakfphabd16222MT.tif

Aposphragisma dayak, female habitus, ventral view (image by MT, specimen ID: ---16222)

apospdayakfphabv16222MT.tif

Aposphragisma dayak, female sternum, ventral view (image by MT, specimen ID: ---16222)

apospdayakfpstev16222MT.tif

 

DISTRIBUTION

BRUNEI DARUSSALAM
Aposphragisma dayak 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 00016222  BRUNEI DARUSSALAM  Belait District    Labi Hills Forest Reserve, Teraja, 42 km S de Sungai Liang  1 Adult Female  Holotype  40  4.28333; 114.41667  mixed dipterocarp forest, vegetational debris  22 Nov 1988  Hauser, B.  MHNG 


 
 
 
 
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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