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OONOPIDAE SPECIES DESCRIPTION
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Birabenella elqui       Get publication



            Female (PBI_OON 14993). Total length 1.80. CEPHALOTHORAX: Carapace pale orange, without any pattern, broadly oval in dorsal view, pars cephalica flat 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, posterolateral surface without spikes, surface of elevated portion of pars cephalica smooth, sides finely reticulate, thorax without depressions, fovea absent, without radiating rows of pits; lateral margin straight, rebordered, 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 dark, needle-like; marginal setae dark, needle-like. 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. Chilum absent. Eyes six, well developed, ALE largest, all eyes circular; posterior eye row recurved from above, straight from front; ALE separated by more than their diameter, ALE-PLE separated by less than ALE radius, PME separated by less than their radius, PLE-PME separated by PME radius to PME diameter. 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, surface smooth, without pits, microsculpture absent, sickle-shaped structures absent, anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, lateral margin without infra-coxal grooves, distance between coxae approximately equal, extensions of pre-coxal triangles absent, lateral margins unmodified, without posterior hump; setae sparse, dark, needle-like, evenly scattered, originating from surface. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified; fangs directed medially, shape normal, without prominent basal process, tip unmodified; setae dark, needle-like, evenly scattered; paturon distal region unmodified, posterior surface unmodified, promargin unmodified, inner margin unmodified. Labium not fused to sternum, subpentagonal. Endites distally not excavated, serrula present in single row, anteromedian tip unmodified, posteromedian part unmodified. 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 pale light orange. Book lung covers large. Posterior spiracles connected by groove. Pedicel tube short, unmodified, scuto-pedicel region unmodified, scutum absent, but abdomen not extending anterior of pedicel, plumose hairs absent, matted setae on anterior ventral abdomen in pedicel area absent, cuticular outgrowths near pedicel absent. Dorsal scutum absent. Epigastric scutum absent. Postepigastric scutum absent. Spinneret scutum absent. Dorsum setae present, dark, stout. Epigastric area setae uniform, dark, needle-like. Postepigastric area setae present, dark, needle-like. Colulus absent. 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 spines absent. Tarsi I to IV superior claws tooth not examined in detail. Tarsi I to IV without inferior claw. Trichobothria not examined. GENITALIA: Shape: anterior diverticle clearly sinuous, with a thin lumen, associated to a transverse sclerite (with at least two pair of muscles attached). Advanced, and apparently attached to the sclerite, there is an anterior process with a transverse widened structure. These anterior elements together look like the complex known in other oonopids, as "Opopaea" fosuma Burger 2002 and Silhouettella loricatula (Roewer 1942), described in Burger et al (2003)and Burger et al (2006), and probably have some type of locking mechanism. The posterior receptaculum reduced, irregular, with an also irregular and reduced duct..
Birabenella elqui, female habitus, dorsal view (image by XG, specimen ID: ---14993)

birabelquifphabd14993XG.tif

Birabenella elqui, female habitus, ventral view (image by XG, specimen ID: ---14993)

birabelquifphabv14993XG.tif

Birabenella elqui, female habitus, lateral view (image by XG, specimen ID: ---14993)

birabelquifphabl14993XG.tif

Birabenella elqui, female carapace, dorsal view (image by XG, specimen ID: ---14993)

birabelquifpcard14993XG.tif

Birabenella elqui, female carapace, ventral view (image by XG, specimen ID: ---14993)

birabelquifpcarv14993XG.tif

Birabenella elqui, female carapace, lateral view (image by XG, specimen ID: ---14993)

birabelquifpcarl14993XG.tif

Birabenella elqui, female carapace, anterior view (image by XG, specimen ID: ---14993)

birabelquifpcara14993XG.tif

Birabenella elqui, female epigynum, epigynal area, ventral view (image by XG, specimen ID: ---14993)

birabelquifpepiv14993XG.tif

Birabenella elqui, female internal female genitalia, dorsal view (image by XG, specimen ID: ---14993)

birabelquifdifgd14993XG.tif

 

DISTRIBUTION

CHILE
Birabenella elqui 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 Birabenella elqui, Discover Life Map
 

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 000149930  CHILE  Coquimbo - Region IV  Elqui  Cuesta Porotitos  1 Adult Female  Holotype  106  -29.79447; -71.29216  shrubs,stones,etc., Under rock  16 Aug 2009  C. Grismado, A. Ojanguren, J. Pizarro & F. Alfaro  MNSC 


 
 
 
 
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