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OONOPIDAE SPECIES DESCRIPTION
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Birabenella kamanchaca       Get publication



            Male (PBI_OON 42098). CEPHALOTHORAX: Carapace pale orange, without any pattern, ovoid 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 smooth, sides smooth, thorax without depressions, fovea absent, without radiating rows of pits; lateral margin straight, smooth, 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. Eyes six, well developed, on dark area, all subequal, all eyes oval; posterior eye row recurved from above, straight from front; ALE separated by their radius to diameter, ALE-PLE separated by less than ALE radius, PME separated by less than their radius, PLE-PME separated by less than PME radius. 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, radial furrow opposite coxae III absent, surface smooth, without pits, microsculpture absent, sickle-shaped structures absent, anterior margin unmodified, posterior margin not extending posteriorly of coxae IV, 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, light, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium pale orange. Chelicerae straight, anterior face unmodified; fangs without tooth-like projections, 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, laminate groove absent. Labium triangular, not fused to sternum, anterior margin not indented at middle, same as sternum in sclerotization; with 3-5 setae on anterior margin, subdistal portion with unmodified setae. Endites distally not excavated, anteromedian tip unmodified, posteromedian part unmodified, same as sternum in sclerotization, two darkened, curved setae in the tip.. ABDOMEN: ovoid, without long posterior extension, rounded posteriorly, inter-scutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions pale white, without color pattern. Book lung covers small, without setae, anterolateral edge unmodified. 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, needle-like. Epigastric area setae uniform, dark, needle-like. Postepigastric area setae present, dark, needle-like. Dense patch of setae anterior to spinnerets absent. 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: Epigastric region with sperm pore not visible; furrow without omega-shaped insertions, without setae. Palp normal size, not strongly sclerotized, right and left palps symmetrical, proximal segments pale orange; embolus light, 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 basally; 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, plumose setae absent, without stout setae, without distal patch of setae; bulb pale orange, 1 to 1.5 times as long as cymbium, stout, tapering apically, middle part fundus nearly spherical, ventral, from where arises the weakly sclerotized seminal duct; gently curved to dorsal in the origin, it turns almost straight along almost all its length, running paralelly to a tendon., distal part embolus opening is presumably located between two flattened distal projections of the bulb, one on the prolateral side, slightly darkened and bent to ventral, and another forwardly directed, traslucent and wit acute tip. A curved, digitiform projection on the ventral part of the bulb, near the distal part..

            Female (PBI_OON 42083). As in male except as noted. CEPHALOTHORAX: Eyes on dark area. Female palp claws absent; spines absent; tarsus unmodified. ABDOMEN: dorsum soft portions slightly darker than the abdomen´s male.. LEGS: Leg spines absent. Trichobothria not examined. Tarsal organ on leg I, the tarsal organ have an inconspicuous proxinal ridge and at least one sensilla visible; there are two additional small, very low projections but there is no evidence that they are true receptors. Leg III with tarsal organ oval, with a proximal ridge and two sensilla, one large and another small.. GENITALIA: Dorsal view: anterior sclerite small, drop-shaped, apparently with a lumen; two thin consecutive transverse sclerotized bars separate it from the posterior part of the genitalia, that have a transverse sclerotized bar (with lateral muscle insertions); copulatory opening led apparently to the thick walled anterior copulatory duct, that describes several very tight turns before to connecting with the posterior receptacle. The latter have an anterodorsal wall thickened, with reticulated surface; inside that, apparently an irregular lumen..
 

DISTRIBUTION

CHILE
Birabenella kamanchaca 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 kamanchaca, 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 00042433  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Female  Paratype  114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042432  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Male  Paratype  114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042432  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Male  Paratype  114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042434  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Female    114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042098  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Male  Holotype  114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MNSC 
PBI_OON 00042083  CHILE  Antofagasta - Region II  Antofagasta  8.1 km NNW Paposo, 60 km (por aire) N. Taltal  1 Adult Female  Paratype  114  -24.93944; -70.49250  desert scrub  27 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042430  CHILE  Atacama - Region III  Copiapo  Quebrada El León, ca. Ruta 5, 10.5 km NNE Caldera  1 Adult Female    50  -26.97715; -70.78150  desert scrub  25 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042429  CHILE  Atacama - Region III  Copiapo  Quebrada El León, ca. Ruta 5, 10.5 km NNE Caldera  1 Adult Female  Paratype  50  -26.97715; -70.78150  desert scrub  25 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MNSC 
PBI_OON 00042429  CHILE  Atacama - Region III  Copiapo  Quebrada El León, ca. Ruta 5, 10.5 km NNE Caldera  1 Adult Female  Paratype  50  -26.97715; -70.78150  desert scrub  25 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MNSC 
PBI_OON 00042084  CHILE  Atacama - Region III  Huasco  Carretera Contera, near Caleta de los Burros, 5.4 km NNE Carrizal Bajo  1 Adult Female    50  -28.03727; -71.12570  desert scrub  25 Oct 2011  M. J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 


 
 
 
 
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