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(Female redundant descriptions removed)
Birabenella argentina       Get publication

            Male (PBI_OON 14757). Total length 1.71. CEPHALOTHORAX: Carapace orange-brown, 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, 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, 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 absent, specimen in not good condition, most setae seem to be lost.; non-marginal pars thoracica setae light, needle-like, specimen in not good condition, most setae seem to be lost.; marginal setae light, needle-like. Clypeus margin unmodified, curved downwards 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, stout. Chilum absent. Eyes six, well developed, the original description mentioned that the eyes are on a dark pigmented area. In this specimen seems to be faded. But in the other known male this dark area is still visible (Fig. X)., all subequal, all eyes circular; posterior eye row recurved from above, straight from front; ALE separated by more than their diameter, ALE-PLE separated by ALE radius to ALE diameter, PME separated by less than their radius, PLE-PME separated by PME radius to PME diameter. Sternum as long as wide, orange-brown, uniform, not fused to carapace, median concavity absent, without radial furrows between coxae I-II, II-III, III-IV, surface finely reticulate, without pits, microsculpture covering entire surface, sickle-shaped structures absent, anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, anterior corner unmodified, 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, without hair tufts. Mouthparts: Chelicerae, endites and labium orange-brown. Chelicerae straight, anterior face unmodified; without teeth on both promargin and retromargin; fangs directed medially, shape normal, without prominent basal process, tip unmodified; setae light, needle-like, evenly scattered. Labium not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization, subpentagonal, elongated; without setae. Endites distally not excavated, serrula present in single row, posteromedian part unmodified, same as sternum in sclerotization, endites convergent anteriorly, anterior tip with one strong, spine-like projection. ABDOMEN: ovoid, without long posterior extension, rounded posteriorly; dorsum soft portions white, without color pattern. 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. Dorsum setae present, light, stout. Epigastric area setae uniform, light, needle-like. Postepigastric area setae present, light, needle-like. Dense patch of setae anterior to spinnerets absent. Colulus absent. Spinnerets: ALS: pale, cylindrical.; PMS: not examined; PLS: not examined. LEGS: 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. 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: Epigastric region with sperm pore not visible. Palp normal size, not strongly sclerotized, proximal segments pale orange; embolus light, embolus difficult to see, surrounded with several membranous elements. All of these arising from a broad opening of the bulb.; trochanter normal size, unmodified; femur normal size, two or more times as long as trochanter, without posteriorly rounded lateral dilation; patella shorter than femur, not enlarged, setae unmodified; tibia trichobothria not examined; cymbium pale orange, ovoid in dorsal view, not fused with bulb, not extending beyond distal tip of bulb, without distal patch of setae; bulb pale orange, 1 to 1.5 times as long as cymbium, stout, tapering apically, distal part with a distinct, small, digitiform ventral apophysis.
Birabenella argentina, male palp, prolateral view (image by XG, specimen ID: ---14758)


Birabenella argentina, male abdomen, ventral view (image by XG, specimen ID: ---14757)


Birabenella argentina, male bulb, retrolateral view (image by XG, specimen ID: ---14758)


Birabenella argentina, male carapace, anterior view (image by XG, specimen ID: ---14757)


Birabenella argentina, male carapace, dorsal view (image by XG, specimen ID: ---14757)


Birabenella argentina, male carapace, lateral view (image by XG, specimen ID: ---14757)


Birabenella argentina, male carapace, posterior view (image by XG, specimen ID: ---14757)


Birabenella argentina, male carapace, ventral view (image by XG, specimen ID: ---14757)


Birabenella argentina, male habitus, dorsal view (image by XG, specimen ID: ---14757)


Birabenella argentina, male habitus, lateral view (image by XG, specimen ID: ---14757)


Birabenella argentina, male claws, leg IV, prolateral view (image by XG, specimen ID: ---14758)


Birabenella argentina, male carapace, dorsal view (image by XG, specimen ID: ---14758)


Birabenella argentina, male carapace, ventral view (image by XG, specimen ID: ---14758)


Birabenella argentina, male carapace, lateral view (image by XG, specimen ID: ---14758)


Birabenella argentina, male carapace, anterior view (image by XG, specimen ID: ---14758)




Birabenella argentina 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 argentina, 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 00014758  ARGENTINA  Catamarca    unknown  1 Adult Male      ;     12 Mar 1950  M. Biraben  MLP 
PBI_OON 00014758  ARGENTINA  Catamarca    Hualfin  1 Adult Male    1845  -27.22500; -66.83300      M. Biraben  MLP 
PBI_OON 00014757  ARGENTINA  Catamarca    unknown  1 Adult Male  Holotype    ;     12 Mar 1950  M. Biraben  MLP 

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