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(Female redundant descriptions removed)
Amazoonops caxiuana       Get publication

            Male (PBI_OON 40532). Total length 1.30. CEPHALOTHORAX: Carapace orange-brown, without any pattern, ovoid in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, 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 granulate, sides granulate, thorax without depressions, fovea absent, without radiating rows of pits; lateral margin straight, rebordered, with blunt denticles; plumose setae near posterior margin of pars thoracica absent; non-marginal pars cephalica setae needle-like, present, scattered; non-marginal pars thoracica setae needle-like; marginal setae needle-like. Clypeus margin slightly rebordered, sinuous in front view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more, median projection absent; setae present, needle-like. Chilum absent. Eyes six, well developed, all subequal, ALE circular, PME oval, PLE circular; posterior eye row recurved from above; ALE separated by less than their radius, ALE-PLE touching, PME touching throughout most of their length, PLE-PME touching. Sternum longer than wide, orange-brown, uniform, fused to carapace, median concavity absent, with radial furrows between coxae I-II, II-III, III-IV, furrow wrinkled, radial furrow opposite coxae III absent, surface rugose, without pits, microsculpture covering entire surface, sickle-shaped structures absent, anterior margin unmodified, posterior margin not extending posteriorly of coxae IV, 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 unmodified, without posterior hump, anterior margin of sternum with a row of small depressions; setae sparse, needle-like, evenly scattered, originating from surface, without hair tufts. Mouthparts: Chelicerae, endites and labium orange-brown. Chelicerae slightly divergent, anterior face unmodified; fangs without tooth-like projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae needle-like, evenly scattered; paturon distal region unmodified, posterior surface unmodified, promargin unmodified, inner margin unmodified. Labium rectangular, 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 not excavated, serrula present in single row, anteromedian tip with one strong, tooth-like projection, posteromedian part unmodified, same as sternum in sclerotization. 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, no soft tissue visible from above, not fused to epigastric scutum, middle surface finely reticulate, sides finely reticulate, anterior half without projecting denticles. Epigastric scutum strongly sclerotized, surrounding pedicel, not protruding, small lateral sclerites absent. Postepigastric scutum strongly sclerotized, pale orange, long, semicircular, covering nearly full length of abdominal length, fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Spinneret scutum absent. Dorsum setae present, needle-like. Epigastric area setae uniform, needle-like. Postepigastric area setae present, needle-like. Dense patch of setae anterior to spinnerets absent. Interscutal membrane with setae. Colulus represented only by setae. LEGS: pale orange, 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 present, 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 examined in detail; tarsal proclaws and retroclaws inner face smooth; tarsus I superior claws with four teeth on lateral surface of proclaw, one tooth on median surface of proclaw, four teeth on lateral surface of retroclaw, one tooth on median surface of retroclaw; tarsus IV superior claws with two teeth on lateral surface of proclaw, one tooth on median surface of proclaw, two teeth on lateral surface of retroclaw, one tooth on median surface of retroclaw. Trichobothria examined with SEM; base longitudinally narrowed, hood smooth. Tarsal organ with 2 sensilla visible. GENITALIA: Epigastric region with sperm pore small, oval, situated between anterior and posterior spiracles, unmodified; 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 present, embolus small,lamellar, twisted, with a large rounded prolateral aperture; 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; cymbium pale orange, narrow 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 yellow, 1 to 1.5 times as long as cymbium, stout, spherical.
Amazoonops caxiuana, male habitus, dorsal view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male habitus, lateral view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male habitus, ventral view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male carapace, dorsal view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male carapace, lateral view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male carapace, anterior view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male sternum, ventral view (image by RO, specimen ID: ---40532)


Amazoonops caxiuana, male palp, prolateral view (image by RO, specimen ID: ---40553)


Amazoonops caxiuana, male palp, anterior view (image by RO, specimen ID: ---40553)


Amazoonops caxiuana, male palp, retrolateral view (image by RO, specimen ID: ---40553)


Amazoonops caxiuana, male palp, dorsal view (image by RO, specimen ID: ---40553)


Amazoonops caxiuana, male palp, prolateral view (image by RO, specimen ID: ---40522)


Amazoonops caxiuana, male palp, retrolateral view (image by RO, specimen ID: ---40522)


Amazoonops caxiuana, male endites, ventral view (image by XB, specimen ID: ---40510)


Amazoonops caxiuana, male palp, retrolateral view (image by XB, specimen ID: ---40510)


            Female (PBI_OON 40531). Total length 1.37. As in male except as noted. CEPHALOTHORAX: Labium with 3-5 setae on anterior margin. Endites anteromedian tip unmodified. Female palp claws absent; spines absent; tarsus unmodified, patella without prolateral row of ridges. ABDOMEN: Pedicel tube short, unmodified, scutum not extending far dorsal of pedicel. Dorsal scutum absent. Epigastric scutum weakly sclerotized, not surrounding pedicel, without lateral joints, epigastric scutum not surrounding pedicel dorsally. Postepigastric scutum weakly sclerotized, short, only around epigastric furrow, not fused to epigastric scutum. LEGS: Leg spines absent. GENITALIA: Shape: large posterior receptaculum; anterior receptaculum with squared sclerite; gull-winged transversal sclerite bearing two short posteriorly directed apodemas; lateral apodemas arround epigastric furrow.
Amazoonops caxiuana, female habitus, dorsal view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female habitus, lateral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female habitus, ventral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female carapace, dorsal view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female carapace, lateral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female carapace, anterior view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female sternum, ventral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female abdomen, anterior view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female abdomen, lateral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female epigynum, epigynal area, ventral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female internal female genitalia, ventral view (image by RO, specimen ID: ---40531)


Amazoonops caxiuana, female internal female genitalia, ventral view (image by RO, specimen ID: ---40531)




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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
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