Welcome Locality Data Entry        | Links | About Oonopidae | Outreach | Sign In 
Home | Project Description | Investigators | Species Pages |
Home >> Species Pages >>
(1) List all species     
OR       (2) Search by: Select the genus
Select the species
(Female redundant descriptions removed)
Pescennina ibarrai       Get publication

            Male (PBI_OON 562). Total length 1.85. CEPHALOTHORAX: Carapace with scattered dark markings. Sternum with scattered dark markings. ABDOMEN: dorsum soft portions dorsum with transverse white stripe at about half its length, stripe much wider medially than laterally, enclosing dark area medially. LEGS: femora i-IV darkened everywhere except base and tip, patellae i-IV darkened ventrally, tibiae i-III darkened ventrally, IV darkened everywhere except dorsum. Leg spines . Tarsi I to IV superior claws tooth not examined in detail. Trichobothria not examined.

            Female (PBI_OON 562). Total length 1.85. As in male except as noted. CEPHALOTHORAX: Carapace brown, elongate oval in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, with angular posterolateral corners, posterolateral edge without pits, posterior margin not bulging below posterior rim, posterolateral surface without spikes, surface of elevated portion of pars cephalica finely reticulate, sides finely reticulate, thorax without depressions, fovea absent, with scattered dark markings, without radiating rows of pits; lateral margin straight, rebordered, with sharply pointed 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 slightly rebordered, straight 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 largest, ALE oval, PME circular, PLE oval; posterior eye row straight from above, procurved 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 more than PME diameter. Sternum longer than wide, orange-brown, 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 rugose, without pits, microsculpture everywhere but front, sickle-shaped structures absent, anterior margin with interrupted transverse groove, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, lateral margin with infra-coxal grooves and anterior and posterior openings, distance between coxae approximately equal, extensions of pre-coxal triangles absent, lateral margins with indented extensions between coxae, without posterior hump, with scattered dark markings; setae sparse, dark, needle-like, densest laterally, originating from surface. 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 dark, needle-like, evenly scattered; paturon inner margin with short inter-digitating setae, distal region abruptly narrowed, posterior surface unmodified, promargin unmodified, inner margin unmodified, laminate groove absent. Labium triangular, fused to sternum, anterior margin indented at middle; with 6 or more setae on anterior margin, subdistal portion with unmodified setae. Endites distally not excavated, serrula present in single row, anteromedian tip unmodified, posteromedian part unmodified. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: cylindrical, without long posterior extension, rounded posteriorly, inter-scutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions brown, dorsum with transverse white stripe at about half its length, stripe much wider medially than laterally, enclosing dark area medially. Book lung covers large, ovoid, without setae, anterolateral edge unmodified. Posterior spiracles connected by groove. Pedicel tube short, unmodified, scuto-pedicel region unmodified, scutum not 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 absent. Epigastric scutum weakly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent, without lateral joints. Postepigastric scutum weakly sclerotized, brown, short, only around epigastric furrow, not fused to epigastric scutum, anterior margin unmodified, with short posteriorly directed lateral apodemes. 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 long setae. Dense patch of setae anterior to spinnerets absent. Colulus absent. LEGS: yellow; 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, femora i-IV darkened everywhere except base and tip, patellae i-IV darkened ventrally, tibiae i-III darkened ventrally, IV darkened everywhere except dorsum. 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: transverse portion of anterior duct short; posterior receptaculum apparently with posterior extension.
Pescennina ibarrai, female abdomen, ventral view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female carapace, dorsal view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female carapace, lateral view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female habitus, anterior view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female habitus, dorsal view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female habitus, lateral view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female habitus, ventral view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female internal female genitalia, dorsal view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female internal female genitalia, ventral view (image by ND, specimen ID: ---00562)


Pescennina ibarrai, female sternum, ventral view (image by ND, specimen ID: ---00562)




Pescennina ibarrai 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 Pescennina ibarrai, Discover Life Map

Order by:    
PBI USI Country State Division Locality Sex Type Status Elevation(m) GPS Coordinate Habitat Collection_Date Collector Inst. Code
PBI_OON 00000562  MEXICO  Chiapas  None or Unknown  Municipio Union Juarez, Ejido Talquian  1 Adult Female  Holotype  2048  15.09383; -92.10158    18 Jun 2009  J. Maya, G. Ibarra, A. Lopez, E. Senties  ECOTAAR 

The American Museum of Natural History, New York, in collaboration with
The California Academy of Sciences, San Francisco   The University of California, Berkeley
The Field Museum of Natural History, Chicago   George Washington University, Washington DC
©Copyright 2006-2022. All Rights Reserved.
This material is based upon work supported by the National Science Foundation under Grant No. DEB 0613754. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
If the format of any material on the website interferes with your ability to access that material, please contact us at [email protected]