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(Female redundant descriptions removed)
Opopaea billroth       Get publication

            Male (PBI_OON 4378). Total length 1.87. CEPHALOTHORAX: Carapace orange-brown, without any pattern, broadly oval 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, anterolateral corners without extension or projections, posterolateral surface without spikes, surface of elevated portion of pars cephalica smooth, sides granulate, thorax without depressions, fovea absent, 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 dark, needle-like, present in u-shaped row; non-marginal pars thoracica setae dark, needle-like; marginal setae dark, needle-like. Clypeus margin slightly rebordered, curved downwards in front view, sloping forward in lateral view, high, ALE separated from edge of carapace by their radius or more, median projection absent; setae present, dark, needle-like. Chilum absent. Eyes six, well developed, aLE: 0.064; PME: 0.058; PLE: 0.048, ALE largest, all eyes circular; posterior eye row recurved from above, straight from front; ALE separated by more than their diameter, ALE-PLE touching, PME touching for less than half their length, PLE-PME touching. Sternum longer than wide, orange-brown, uniform, fused to carapace, median concavity absent, with radial furrows between coxae I-II, II-III, III-IV, furrow with rows of small pits, radial furrow opposite coxae III absent, surface smooth, without pits, microsculpture only in furrows, sickle-shaped structures absent, anterior margin unmodified, posterior margin not extending posteriorly of coxae IV, anterior corner unmodified, lateral margin with infra-coxal grooves and anterior and posterior openings, distance between coxae approximately equal, extensions of pre-coxal triangles absent, lateral margins unmodified, without posterior hump, furrows barely visible; setae sparse, dark, needle-like, evenly scattered, originating from small pits, without hair tufts. Mouthparts: Chelicerae, endites and labium orange-brown. Chelicerae straight, anterior face unmodified; without teeth on both promargin and retromargin; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae dark, needle-like, densest medially; paturon distal region unmodified, posterior surface unmodified, promargin unmodified, inner margin unmodified, laminate groove absent. Labium triangular, fused to sternum, anterior margin indented at middle, same as sternum in sclerotization; with 1 or 2 setae on anterior margin, subdistal portion with unmodified setae. Endites distally not excavated, serrula present in single row, anteromedian tip with one strong, tooth-like projection, posteromedian part unmodified, same as sternum in sclerotization. ABDOMEN: globular, 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, ovoid, without setae, anterolateral edge unmodified. Posterior spiracles connected by groove. Pedicel tube short, with small, dorsolateral, triangular extensions, scuto-pedicel region with paired curved scutal ridges, scutum extending far dorsal of pedicel, plumose hairs lateral of pedicel, matted setae on anterior ventral abdomen in pedicel area absent, cuticular outgrowths near pedicel absent, scuto/pedicel area larger than diameter of pedicel, with strong medially connected paired scutal ridges and plumose setae lateral of pedicel. 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. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent. Postepigastric scutum strongly sclerotized, orange-brown, long, semicircular, covering nearly full length of abdominal length, 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 stout 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 I unmodified, 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. Tarsi I to IV superior claws tooth not examined in detail. Tarsi I to IV without inferior claw. Trichobothria not examined. GENITALIA: Epigastric region with sperm pore small, narrow, slit-like, situated at level of anterior spiracles, rebordered; furrow without omega-shaped insertions, without setae. Palp normal size, not strongly sclerotized, right and left palps symmetrical, proximal segments orange-brown; embolus dark, prolateral excavation absent; trochanter normal size, unmodified; femur normal size, two or more times as long as trochanter, without posteriorly rounded lateral dilation, attaching to patella medially; patella longer than femur, much larger than femur, without prolateral row of ridges, setae unmodified, patella orange brown, 0.367 long, 0.185 wide, connection to femur at 0.58; tibia trichobothria not examined; cymbium orange-brown, narrow in dorsal view, completely fused with bulb, no seam visible, not extending beyond distal tip of bulb, plumose setae absent, without stout setae, with distal patch of setae; bulb orange-brown, 1 to 1.5 times as long as cymbium, slender, tapering apically, bulb ventrally slightly bulged with broad rectangular deeply insiced palpal tip with two additional v-shaped folds.
Opopaea billroth, male abdomen, anterior view (image by BB, specimen ID: ---04378)


Opopaea billroth, male carapace, anterior view (image by BB, specimen ID: ---04378)


Opopaea billroth, male carapace, prolateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male habitus, dorsal view (image by BB, specimen ID: ---04378)


Opopaea billroth, male habitus, lateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male habitus, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male palp, dorsal view (image by BB, specimen ID: ---04378)


Opopaea billroth, male palp, prolateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male palp, retrolateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male abdomen, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male palp, dorsal view (image by BB, specimen ID: ---04378)


Opopaea billroth, male palp, prolateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male pedicel, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male endites, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male sperm pore, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, male sternum, ventral view (image by BB, specimen ID: ---04378)


            Female (PBI_OON 4378). Total length 2.01. As in male except as noted. CEPHALOTHORAX: Eyes aLE: 0.092; PME: 0.077; PLE: 0.068. Sternum furrows barely visible. Endites anteromedian tip unmodified. Female palp claws absent; spines absent. ABDOMEN: Postepigastric scutum not fused to epigastric scutum. LEGS: Leg spines absent. Tarsi I to IV superior claws tooth not examined in detail. Trichobothria not examined.
Opopaea billroth, female abdomen, anterior view (image by BB, specimen ID: ---04378)


Opopaea billroth, female carapace, anterior view (image by BB, specimen ID: ---04378)


Opopaea billroth, female carapace, prolateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, female epigynum, epigynal area, ventral view (image by BB, specimen ID: ---04378)


Opopaea billroth, female habitus, dorsal view (image by BB, specimen ID: ---04378)


Opopaea billroth, female habitus, lateral view (image by BB, specimen ID: ---04378)


Opopaea billroth, female habitus, ventral view (image by BB, specimen ID: ---04378)




Opopaea billroth 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 Opopaea billroth, Discover Life Map

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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 00048260  AUSTRALIA  Western Australia  Pilbara  Phyton Pool, 5 km WSW  1 Adult Male      -21.34111; 117.18833    08 May 2003  CALM Pilbara Survey  WAMP 
PBI_OON 00004378  AUSTRALIA  Western Australia  Pilbara  Mt Billroth, 12km ESE  1 Adult Male  Holotype    -21.66250; 117.70472    05 May 2004  CALM Pilbara Survey  WAMP 

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The Field Museum of Natural History, Chicago   George Washington University, Washington DC
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