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OONOPIDAE SPECIES DESCRIPTION
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(Female redundant descriptions removed)
Scaphidysderina baerti       Get publication



            Male (PBI_OON 16636). Total length 2.27. CEPHALOTHORAX: Carapace red-brown, without any pattern, broadly oval in dorsal view, pars cephalica strongly 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, sides granulate, thorax without depressions, fovea absent, elevated portion of pars cephalica with low tubercles around midline, surrounded by U-shaped zsmooth area, 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 light, needle-like, present, scattered; non-marginal pars thoracica setae light, needle-like; marginal setae light, needle-like. Clypeus margin strongly rebordered, sinuous in front view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more, median projection present; setae present, light, needle-like. Chilum undivided, fused to clypeus, seam present, rectangular, extending forward distance equal to about one-fourth of clypeus height. Eyes six, well developed, ALE largest, ALE oval, PME squared, PLE oval; posterior eye row recurved from above, procurved from front; ALE separated by their radius to diameter, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius. Sternum wider than long, orange-brown, 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, without pits, microsculpture everywhere but front, sickle-shaped structures absent, anterior margin with continuous transverse groove, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, anterior corner unmodified, 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 bridges to coxae, without posterior hump, surface crenulated, setal bases enlarged into small tubercles; setae sparse, light, needle-like, densest laterally, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium orange-brown. Chelicerae slightly divergent, anterior face with swelling, anterior face of paturon with produced ledge, both edges of ledge rounded; inner margin of paturon excavated, with heavily sclerotize spine extending back toward clypeus; without teeth on both promargin and retromargin; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae light, needle-like, densest medially; paturon inner margin with pairs of enlarged setae, distal region unmodified, posterior surface unmodified, promargin with row of flattened setae, inner margin unmodified, laminate groove absent. Labium triangular, not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization; with 6 or more setae on anterior margin, subdistal portion with unmodified setae. Endites distally excavated, serrula present in single row, posteromedian part unmodified, same as sternum in sclerotization, anteromedian part with short ventral and longer dorsal projections, tip of dorsal projection directed toward ventral projection. ABDOMEN: ovoid, without long posterior extension, rounded posteriorly, inter-scutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions white, without color pattern. Book lung covers large, ovoid, without setae, anterolateral edge unmodified. Posterior spiracles not connected by groove. Pedicel tube medium, ribbed, scuto-pedicel region unmodified, scutum 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 strongly sclerotized, pale orange, without color pattern, covering full length of abdomen, no soft tissue visible from above, not fused to epigastric scutum, middle surface smooth, sides smooth, anterior half without projecting denticles. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent. Postepigastric scutum strongly sclerotized, pale orange, almost semicircular, covering about 3/4 of abdominal length, fused to epigastric scutum, anterior margin unmodified, with short posteriorly directed lateral apodemes. 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. Interscutal membrane with setae. Colulus present, tiny, with pair of setae. Spinnerets: ALS: bisegmented; PMS: unisegmented; PLS: bisegmented. LEGS: yellow, 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 spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-0-2; r0-1-0; tibiae: I v4-4-2; II v4-4-1p; metatarsi: I v2-2-2; II v2-2-1p. 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 small, triangular with rounded angles, situated between anterior and posterior spiracles, rebordered; 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, long, narrow, dorsal and ventral flanges touching for most of their length; trochanter minute, 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 trichobothria not examined; cymbium yellow, ovoid in dorsal view, completely fused with bulb, no seam visible, not extending beyond distal tip of bulb, plumose setae absent, without stout setae, without distal patch of setae; bulb yellow, 1 to 1.5 times as long as cymbium, stout, elongated.
Scaphidysderina baerti, male bulb, ventral view (image by ND, specimen ID: ---16636)

Scadybaertmpbulv16636ND.tif

Scaphidysderina baerti, male carapace, anterior view (image by ND, specimen ID: ---16636)

Scadybaertmpcara16636ND.tif

Scaphidysderina baerti, male carapace, dorsal view (image by ND, specimen ID: ---16636)

Scadybaertmpcard16636ND.tif

Scaphidysderina baerti, male palp, prolateral view (image by ND, specimen ID: ---16636)

Scadybaertmppalp16636ND.tif

Scaphidysderina baerti, male palp, retrolateral view (image by ND, specimen ID: ---16636)

Scadybaertmppalr16636ND.tif

Scaphidysderina baerti, male sternum, ventral view (image by ND, specimen ID: ---16636)

Scadybaertmpstev16636ND.tif

Scaphidysderina baerti, male embolus, ventral view (image by ND, specimen ID: ---16636)

Scadybaertmsembv16636ND.tif

Scaphidysderina baerti, male carapace, anterior view (image by ND, specimen ID: ---16636)

Scadybaertmscara16636ND.tif

Scaphidysderina baerti, male endites, ventral view (image by ND, specimen ID: ---16636)

Scadybaertmsendv16636ND.tif


            Female (PBI_OON 16636). Total length 2.56. As in male except as noted. CEPHALOTHORAX: Carapace elevated portion of pars cephalica with low tubercles around midline, surrounded by U-shaped zsmooth area. Chilum fused to clypeus, seam present, rectangular, extending forward distance equal to about one-fourth of clypeus height. Sternum surface crenulated, setal bases enlarged into small tubercles. Mouthparts: Chelicerae anterior face of paturon with produced ledge, both edges of ledge rounded; with one tooth on both promargin and retromargin. Endites distally not excavated, anteromedian tip unmodified. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: Dorsal scutum absent. Epigastric scutum without lateral joints. Postepigastric scutum covering about 2/3 of abdominal length, not fused to epigastric scutum. Colulus tiny, with pair of setae. Spinnerets: ALS: bisegmented; PMS: unisegmented; PLS: bisegmented. LEGS: pale orange. Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-0-2; r0-1-1; II p0-0-2; r0-1-0; tibiae: I v4-4-4; II v4-4-1p; metatarsi: I v2-2-2; II v2-2-1p. Tarsi I to IV superior claws tooth not examined in detail. Trichobothria not examined. GENITALIA: Shape: unsclerotized atrium wide, very short; anterior receptaculum wide at base.
Scaphidysderina baerti, female abdomen, lateral view (image by ND, specimen ID: ---16636)

Scadybaertfpabdl16636ND.tif

Scaphidysderina baerti, female abdomen, ventral view (image by ND, specimen ID: ---16636)

Scadybaertfpabdv16636ND.tif

Scaphidysderina baerti, female carapace, anterior view (image by ND, specimen ID: ---16636)

Scadybaertfpcara16636ND.tif

Scaphidysderina baerti, female epigynum, epigynal area, ventral view (image by ND, specimen ID: ---16636)

Scadybaertfpepiv16636ND.tif

Scaphidysderina baerti, female internal female genitalia, dorsal view (image by ND, specimen ID: ---16636)

Scadybaertfpifgd16636ND.tif

Scaphidysderina baerti, female internal female genitalia, ventral view (image by ND, specimen ID: ---16636)

Scadybaertfpifgv16636ND.tif

 

DISTRIBUTION

ECUADOR
Scaphidysderina baerti coordinates
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MATERIAL EXAMINED
Order by:    
PBI USI Country State Division Locality Sex Type Status Elevation(m) GPS Coordinate Habitat Collection_Date Collector Inst. Code
PBI_OON 00000638  ECUADOR  Napo    Yanayacu biological station  1 Adult Male    2144  -0.59925; -77.89046    26 Nov 2009  Niarchos Expedition  AMNH 
PBI_OON 00030626  ECUADOR  Napo    Yanayacu biological station, stream trail  1 Adult Male    2130  -0.59925; -77.89051  leaf litter and root mat  24 Nov 2009  Niarchos Expedition  AMNH 
PBI_OON 00000637  ECUADOR  Napo    Parque Nacional Napo-Galeras  1 Adult Male    1005  -0.74361; -77.59138  leaf litter and root mat  27 Nov 2009  Niarchos Expedition  AMNH 
PBI_OON 00030628  ECUADOR  Napo    Parque Nacional Napo-Galeras  1 Adult Male    1105  -0.73403; -77.59073  leaf litter and root mat  27 Nov 2009  Niarchos Expedition, M. Ramirez, C. Grismado, M. Izquierdo, F. Labarque  MACN 
PBI_OON 00000575  ECUADOR  Napo    Parque Nacional Napo-Galeras  1 Adult Female    1005  -0.74361; -77.59138  leaf litter and root mat  27 Nov 2009  Niarchos Expedition  AMNH 
PBI_OON 00016636  ECUADOR  Pastaza    Puyo  3 Adult Male  Holotype  800  -1.48625; -78.00673  tropical forest, humus  01 Apr 1965  J., N. Leleup  KBIN 
PBI_OON 00016636  ECUADOR  Pastaza    Puyo  1 Adult Female    800  -1.48625; -78.00673  tropical forest, humus  01 Apr 1965  J., N. Leleup  KBIN 


 
 
 
 
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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