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OONOPIDAE SPECIES DESCRIPTION
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Scaphidysderina tandapi       Get publication



            Male (PBI_OON 30613). Total length 2.24. 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 cepahilca with low tubercles around midline, surrounded by U-shaped smooth 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 absent, forming long proboscis. 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, depressions separated by anastomosing ridges; 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, proximal two-thirds of paturon medially excavated, inner margin of excavation bearing heavily sclerotized 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 long ventral and dorsal processes, porsal process originating just distal to lateral notch. 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 more than 3/4 of abdomen, more than 1/2 to most of abdomen width, 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 nearly full length 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 two setae. Spinnerets: ALS: bisegmented; PMS: unisegmented; PLS: bisegmented. LEGS: orange-brown, 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; r0-1-1; II p0-0-1; 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, boatlike, with incrassate tip; 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 tandapi, male bulb, ventral view (image by ND, specimen ID: ---37836)

Scadytandampbulv37836ND.tif

Scaphidysderina tandapi, male carapace, anterior view (image by ND, specimen ID: ---37836)

Scadytandampcara37836ND.tif

Scaphidysderina tandapi, male carapace, dorsal view (image by ND, specimen ID: ---37836)

Scadytandampcard37836ND.tif

Scaphidysderina tandapi, male endites, lateral view (image by ND, specimen ID: ---37836)

Scadytandampendl37836ND.tif

Scaphidysderina tandapi, male palp, prolateral view (image by ND, specimen ID: ---37836)

Scadytandamppalp37836ND.tif

Scaphidysderina tandapi, male palp, retrolateral view (image by ND, specimen ID: ---37836)

Scadytandamppalr37836ND.tif

Scaphidysderina tandapi, male sternum, ventral view (image by ND, specimen ID: ---37836)

Scadytandampstev37836ND.tif

Scaphidysderina tandapi, male embolus, ventral view (image by ND, specimen ID: ---37836)

Scadytandamsembv37836ND.tif

Scaphidysderina tandapi, male endites, ventral view (image by ND, specimen ID: ---37836)

Scadytandamsendv37836ND.tif

Scaphidysderina tandapi, male carapace, anterior view (image by ND, specimen ID: ---37836)

Scadytandamscara37836ND.tif


            Female (PBI_OON 554). Total length 2.47. As in male except as noted. CEPHALOTHORAX: Carapace elevated portion of pars cepahilca with low tubercles around midline, surrounded by U-shaped smooth area. Chilum fused to clypeus, seam absent, triangular, extending forward distance equal to about half of clypeus height. Sternum surface crenulated, depressions separated by anastomosing ridges. 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 1/3 of the abdominal length, not fused to epigastric scutum. Colulus tiny, with two setae. Spinnerets: ALS: bisegmented; PMS: unisegmented; PLS: bisegmented. LEGS: Leg spination (only surfaces bearing spines listed, all spines longer than segment width): femora: I p0-0-2; r0-1-2; II p0-0-2; r0-1-0; tibiae: I, II v4-4-2; 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: atrium very small, with W-shaped anterior margin.
Scaphidysderina tandapi, female abdomen, lateral view (image by ND, specimen ID: ---10742)

Scadytandafpabdl10742ND.tif

Scaphidysderina tandapi, female abdomen, ventral view (image by ND, specimen ID: ---00554)

Scadytandafpabdv00554ND.tif

Scaphidysderina tandapi, female carapace, anterior view (image by ND, specimen ID: ---00554)

Scadytandafpcara00554ND.tif

Scaphidysderina tandapi, female epigynum, epigynal area, ventral view (image by ND, specimen ID: ---00554)

Scadytandafpepiv00554ND.tif

Scaphidysderina tandapi, female internal female genitalia, dorsal view (image by ND, specimen ID: ---00554)

Scadytandafpifgd00554ND.tif

Scaphidysderina tandapi, female internal female genitalia, ventral view (image by ND, specimen ID: ---00554)

Scadytandafpifgv00554ND.tif

Scaphidysderina tandapi, female abdomen, lateral view (image by ND, specimen ID: ---00554)

Scadytandafpabdl00554ND.tif

 

DISTRIBUTION

ECUADOR
Scaphidysderina tandapi coordinates
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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 00000554  ECUADOR  Pichincha    Tandapi, 2 km from main road to Quito  2 Adult Female    1405  -0.38805; -78.81777  cloud forest, litter with palm  07 Dec 2009  Niarchos expedition, N. Duperre, E. Tapia  AMNH 
PBI_OON 00000553  ECUADOR  Pichincha    21 km N of Tandapi, on main road to Quito from Tandapi  1 Adult Female    2150  -0.45564; -77.75431  cloud forest, forest litter  07 Dec 2009  Niarchos expedition, N. Duperre, E. Tapia  AMNH 
PBI_OON 00046491  ECUADOR  Santo Domingo de los Tsachilas    Bosque Integral Otonga  1 Adult Female    1705  -0.41972; -78.99472  forest litter  08 Dec 2009  Niarchos expedition, N. Duperre, E. Tapia  AMNH 
PBI_OON 00037836  ECUADOR  Santo Domingo de los Tsachilas    Tinalandia, 16 km NE Santo Domingo  1 Adult Male  Holotype  700  -0.32103; -78.95158  debris from termite nests  05 Jun 1976  S. Peck  FMNH 
PBI_OON 00030613  ECUADOR  Santo Domingo de los Tsachilas  Santo Domingo  Tinalandia lodge Km 85 Road aloaj-Santo Domingo  1 Adult Male    758  -0.32103; -78.95158  litter  07 Dec 2009  M. Ramírez, C. Grismado, M. Izquierdo & F. Labarque (PBI expedition)  MACN 


 
 
 
 
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The Field Museum of Natural History, Chicago   George Washington University, Washington DC
 
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