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OONOPIDAE SPECIES DESCRIPTION
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Trilacuna loebli       Get publication



            Female (PBI_OON 12818). Total length 1.70. CEPHALOTHORAX: Carapace orange, without any pattern, pyriform 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 granulate, thorax without depressions, fovea absent, without radiating rows of pits; lateral margin straight, rebordered, without denticles; non-marginal pars cephalica setae light, needle-like, present, scattered; non-marginal pars thoracica setae absent; marginal setae absent. Clypeus margin unmodified, 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. Chilum absent. Eyes six, well developed, all subequal, all eyes oval; posterior eye row straight from above, procurved from front; ALE separated by their radius to diameter, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius. Sternum as long as 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 coarsely reticulate, microsculpture covering entire surface, sickle-shaped structures absent, anterior margin unmodified, posterior margin not extending posteriorly of coxae IV, lateral margin without infra-coxal grooves, distance between coxae approximately equal, extensions of pre-coxal triangles absent, lateral margins unmodified, without posterior hump, orange; setae sparse, dark, needle-like, evenly scattered, originating from surface. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified, orange; fangs directed medially, shape normal, without prominent basal process, tip unmodified; setae light, needle-like, evenly scattered; paturon inner margin with pairs of enlarged setae, distal region unmodified. Labium triangular, not fused to sternum, anterior margin deeply incised, orange; with 1 or 2 setae on anterior margin, subdistal portion with unmodified setae. Endites distally not excavated, serrula present in single row, anteromedian tip unmodified, posteromedian part unmodified, orange. Female palp claws absent; spines absent; tarsus unmodified. 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, round, 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, cuticular outgrowths near pedicel absent. Dorsal scutum strongly sclerotized, 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, orange. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent, without lateral joints. Postepigastric scutum strongly sclerotized, long, semicircular, covering about 2/3 of abdominal length, not fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes, orange. Spinneret scutum present, incomplete ring. Dorsum setae present, dark, needle-like. Epigastric area setae uniform, dark, needle-like. Postepigastric area setae present, dark, needle-like. Spinneret scutum with fringe of needle-like 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 near as long as 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. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): (leg I: femora: pv0-0-1-0, Tibiae: v2-2-2-2-0, Metatarsi: v2-2-0, leg II: tibiae: v2-2-2-2-0, Metatarsi: v2-2-0. ). Tarsi I to IV without inferior claw. Trichobothria not examined. GENITALIA: Ventral view: postepigastric scutum with indented anterior margin; posterior receptacle visible by transparence, dark.. Dorsal view: internal female genitalia: anterior and posterior elements arising from a transverse sclerotized bar, with lateral apodemes posteriorly directed. Anterior element T-shaped, connected by muscles presumably to the lateral ends of the transverse bar; posterior receptacle worm-shaped, thick, initially is oriented backwards, describing -at its middle- a complete curve forward, becoming gradually thinner..
Trilacuna loebli, female habitus, dorsal view (image by XG, specimen ID: ---12818)

trilaloeblfphabd12818XG.tif

Trilacuna loebli, female habitus, lateral view (image by XG, specimen ID: ---12818)

trilaloeblfphabl12818XG.tif

Trilacuna loebli, female habitus, ventral view (image by XG, specimen ID: ---12818)

trilaloeblfphabv12818XG.tif

Trilacuna loebli, female carapace, dorsal view (image by XG, specimen ID: ---12818)

trilaloeblfpcard12818XG.tif

Trilacuna loebli, female carapace, lateral view (image by XG, specimen ID: ---12818)

trilaloeblfpcarl12818XG.tif

Trilacuna loebli, female carapace, ventral view (image by XG, specimen ID: ---12818)

trilaloeblfpcarv12818XG.tif

Trilacuna loebli, female carapace, anterior view (image by XG, specimen ID: ---12818)

trilaloeblfpcara12818XG.tif

Trilacuna loebli, female abdomen, ventral view (image by XG, specimen ID: ---12818)

trilaloeblfpabdv12818XG.tif

Trilacuna loebli, female epigynum, epigynal area, ventral view (image by XG, specimen ID: ---12818)

trilaloeblfpepiv12818XG.tif

Trilacuna loebli, female internal female genitalia, dorsal view (image by XG, specimen ID: ---12818)

trilaloeblfpifgd12818XG.jpg

Trilacuna loebli, female internal female genitalia, dorsal view (image by XG, specimen ID: ---12818)

trilaloeblfdifgd12818XG.jpg.tif

Trilacuna loebli, female internal female genitalia, dorsal view (image by XG, specimen ID: ---12818)

trilaloeblfdifgd12818XG.tif

 

DISTRIBUTION

INDIA
Trilacuna loebli 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 00012818  INDIA  Assam    Manas  2 Adult Female  Syntype  200  26.72500; 91.03600    21 Oct 1978  C. Besuchet, I. Löbl  MNVG 
PBI_OON 00012791  INDIA  Assam    Manas  1 Adult Female    200  26.72500; 91.03600    22 Oct 1978  Besuchet, C. and Löbl, I.  MNVG 
PBI_OON 00015303  INDIA  Assam    Manas  2 Adult Female    200  26.72500; 91.03600    21 Oct 1978  C. Besuchet, I. Löbl  MNVG 


 
 
 
 
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