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OONOPIDAE SPECIES DESCRIPTION
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Orchestina pizarroi       Get publication



            Male (PBI_OON 42238). Total length 1.16. CEPHALOTHORAX: Carapace orange, without any pattern, ovoid in dorsal view, pars cephalica slightly elevated 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 absent. Clypeus margin unmodified, curved downwards 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, posterior eye row slightly recurved in front view, PME largest, ALE circular, PME oval, PLE circular; posterior eye row recurved from above; ALE separated by more than their diameter, ALE-PLE touching, PME touching throughout most of their length, PLE-PME separated by PME radius to PME diameter. Sternum longer than 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 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 pale orange. Chelicerae straight, anterior face unmodified; without teeth on both promargin and retromargin; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae dark, needle-like, evenly scattered; paturon inner margin with scattered setae, distal region unmodified, inner margin unmodified. Labium rectangular, not fused to sternum, anterior margin not indented at middle, same as sternum in sclerotization; 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, same as sternum in sclerotization, anterior median part whit a group of thick setae. 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 large, round, without setae, anterolateral edge unmodified. Posterior spiracles not connected by groove. Pedicel tube medium, with fringe of setae, scuto-pedicel region unmodified, scutum absent, but abdomen extending anteriad 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. Spinneret scutum with fringe of needle-like setae. Dense patch of setae anterior to spinnerets absent. Colulus present. LEGS: pale orange, without color pattern; patella plus tibia I shorter than carapace, tibia I unmodified, tibia I Emerit’s glands absent, coxae all legs missing except left leg I. Leg spines absent. Tarsi I to IV superior claws tooth not examined in detail. Tarsi I to IV without inferior claw. Trichobothria examined with Stereo microscope; metatarsus: I one. 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 dark, 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, without prolateral row of ridges, setae unmodified; tibia whit at least one trichobothria; 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, more than 2 times as long as cymbium, stout, spherical.

            Female (PBI_OON 42237). Total length 1.41. As in male except as noted. CEPHALOTHORAX: Eyes posterior eye row slightly recurved in front view. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: dorsum soft portions dark purple, cardiac area with four pairs of square purple spots and one additional pair longest, toward spinnerets, laterals with four purple bands. Epigastric scutum weakly sclerotized, not surrounding pedicel, not protruding, small lateral sclerites absent, without lateral joints. LEGS: femur IV thickened, much larger than femora I-III, 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): metatarsi: IV d0-0-1; p0-0-1; r0-0-1. Tarsi I to IV superior claws tooth not examined in detail. Trichobothria examined with Stereo microscope; metatarsus: II one, III one, IV one.
 

DISTRIBUTION

CHILE
Orchestina pizarroi 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 Orchestina pizarroi, 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 00042237  CHILE  Elqui  Región de Coquimbo (IV)  Cuesta Porotitos, N La Serena  3 Adult Female  Paratype  156  -29.70805; -71.30694  xerophytic shrub  23 Oct 2011  M.J. Ramírez, A. Ojanguren, J. Pizarro et al.  MACN 
PBI_OON 00042241  CHILE  Región de Valparaíso (V)  Provincia de Valparaíso  Quebrada El Tigre 2.5 km E Zapallar  1 Adult Female  Paratype  357  -32.55111; -71.43250  Bosque de belloto y boldo en quebrada  12 Feb 2011  M. Ramírez, E. Soto, J. Pizarro  MACN 
PBI_OON 00042238  CHILE  Valparaíso  Región de Valparaíso (V)  Quebrada El Tigre 2.5 km E Zapallar  1 Adult Male  Holotype  357  -32.55138; -71.43277  Bosque de belloto y boldo en quebrada  12 Feb 2011  M. Ramírez, E. Soto, J. Pizarro  MNSC 
PBI_OON 00042238  CHILE  Valparaíso  Región de Valparaíso (V)  Quebrada El Tigre 2.5 km E Zapallar  1 Adult Female  Paratype  357  -32.55138; -71.43277  Bosque de belloto y boldo en quebrada  12 Feb 2011  M. Ramírez, E. Soto, J. Pizarro  MNSC 
PBI_OON 00042226  CHILE  Valparaíso  Región de Valparaíso (V)  Quebrada El Tigre 2.5 km E Zapallar  2 Adult Female  Paratype  357  -32.55138; -71.43277  Bosque de belloto y boldo en quebrada  12 Feb 2011  M. Ramírez, E. Soto, J. Pizarro  MACN 
PBI_OON 00042238  CHILE  Valparaíso  Región de Valparaíso (V)  Quebrada El Tigre 2.5 km E Zapallar  1 Juvenile sex unknown    357  -32.55138; -71.43277  Bosque de belloto y boldo en quebrada  12 Feb 2011  M. Ramírez, E. Soto, J. Pizarro  MNSC 


 
 
 
 
The American Museum of Natural History, New York, in collaboration with
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The Field Museum of Natural History, Chicago   George Washington University, Washington DC
 
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