Longoonops, Platnick N. I. & Dupérré N., 2010

Platnick N. I. & Dupérré N., 2010, The Goblin Spider Genera Stenoonops And Australoonops (Araneae, Oonopidae), With Notes On Related Taxa, Bulletin of the American Museum of Natural History 2010 (340), pp. 1-111 : 71-74

Longoonops , new genus

TYPE SPECIES: Longoonops bicolor , new species.

ETYMOLOGY: The generic name is an arbitrary combination of letters, masculine in gender.

DIAGNOSIS: Members of this genus resemble those of Stenoonops , although they lack the distinct furrows separating the sternal extensions (figs. 584, 618) that are here considered synapomorphic for that genus. In Longoonops species , the posterior median eyes are distinctively elongated, and are longer than the posterior lateral eyes (figs. 559, 605). Some Longoonops species have color patterns on the abdomen and legs that are also not found in Stenoonops .

DESCRIPTION: Total length of males 1.2– 1.7, of females 1.4–1.6; cephalothorax pale orange, legs and palpi yellow (some leg segments sometimes darkened), abdomen white (sometimes with dorsal dark markings). CEPHALOTHORAX: Carapace without any pattern, elongate oval in dorsal view, pars cephalica flat 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 finely reticulate, sides finely reticulate (figs. 576–580, 610, 611, 662, 663, 680, 681); 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; nonmarginal pars cephalica setae dark, needlelike, scattered; nonmarginal pars thoracica setae dark, needlelike; marginal setae absent. Clypeus margin unmodified, straight in front view, sloping forward in lateral view, low, ALE separated from edge of carapace by less than their radius, median projection absent; setae dark, needlelike. Chilum absent. Eyes six, well developed, ALE largest, ALE oval, PME long, narrow, much longer than PLE, PLE circular; ALE separated by less than their radius, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius; posterior eye row straight from above, procurved from front. Sternum longer than wide, coloration uniform, fused to carapace, median concavity absent, without hair tufts or radial furrowlike grooves between coxae I–II, II–III, III–IV (figs. 618, 667), radial furrow opposite coxae III absent; surface with sides finely reticulate, without pits, microsculpture absent at middle (fig. 584, 685), sickle-shaped structures absent; anterior margin unmodified, posterior margin extending posteriorly beyond anterior edges of coxae IV as single extension, anterior corners unmodified, lateral margin without infracoxal grooves, distance between coxae II and III greater than distance between coxae I and II, and coxae III and IV, extensions of precoxal triangles absent, lateral margins with three pairs of lateral projections, with posterior hump; setae sparse, dark, spatulate, in group at base of coxae, originating from surface. Chelicerae straight, anterior face unmodified; without teeth on promargin and retromargin; fang without toothlike projections, directed posteriorly; shape normal, without prominent basal process, tip unmodified; setae dark, spatulate, densest medially; paturon inner margin with pairs of smooth, distally enlarged setae (figs. 581, 612, 664, 682), distal region abruptly narrowed, posterior surface unmodified, promargin with row of flattened setae, laminate groove absent. Labium rectangular, not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization, with six or more setae on anterior margin, subdistal portion with unmodified setae (figs. 586, 665). Endites distally not excavated, same as sternum in sclerotization, usually with anterior modifications in males (fig. 666); females with endites unmodified, with serrula in single row (figs. 613, 614, 683, 684); at least two scanned species with anteromedian margin bearing row of flattened setae with tined tips (fig. 587). Female palp without claw or spines; patella without prolateral row of ridges; tarsus with thickened setae, dorsal surface of tarsus with distal patch of shortened setae (figs. 615–617), those setae greatly reduced in number in L. padiscus (figs. 687–689). ABDOMEN: Cylindrical, without long posterior extension, rounded posteriorly, interscutal membrane without rows of small sclerotized platelets. Supposed 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, not surrounding pedicel, not protruding, small lateral sclerites absent, without anterolateral joints in females. Postepigastric scutum weakly sclerotized, short, only around epigastric furrow, not fused to epigastric scutum, anterior margin unmodified, without posteriorly directed lateral apodemes. Spinneret scutum absent; supraanal scutum absent. Dorsum setae dark, needlelike; epigastric area frontal setae thickened, dark, needlelike; postepigastric area setae dark, needlelike; dense patch of setae anterior to spinnerets absent. Colulus absent. Anterior lateral spinnerets with major ampulate gland spigot and one or two piriform gland spigots, posterior median and posterior lateral spinnerets each with single spigot (figs. 585, 668, 686). LEGS: Femur IV not thickened, same size as femora I–III, femora with transverse dorsal row of setae near distal end, but without obvious constriction at that point (figs. 592, 594, 595, 619, 620, 669), at least femur I with pore plates (fig. 593); 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 mesoapical comb absent, metatarsi III and IV weak ventral scopula absent. Leg spines absent, but anterior tibiae with widened ventral seta at distal tip (fig. 597). Lateral surfaces of superior claws with few large, basal teeth, median surfaces with numerous tiny, closely spaced, distal teeth (figs. 582, 583, 622, 690), inferior claw absent. Trichobothrial bases ovoid, with few ridges (figs. 596, 691); tarsal organ elongate (figs. 598, 599, 621, 623–625, 670, 671, 692, 693). GENITALIA: Male epigastric region with sperm pore not visible; furrow without V- shaped insertions, without setae. Male palp of normal size, not strongly sclerotized, right and left palps symmetrical, embolus light, without prolateral excavation; trochanter of normal size, unmodified; femur 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; tibial trichobothria not examined; cymbium ovoid in dorsal view, fused with bulb but retaining seam (figs. 588–590, 672–674), not extending beyond distal tip of bulb, plumose setae absent, thickened setae present, with distal patch of shortened setae (fig. 591), reduced in number in S. padiscus (fig. 675); bulb 1–1.5 times as long as cymbium, stout, tapering apically; embolus short, basally thickened. Internal female genitalia reduced (except in L. padiscus ).

DISTRIBUTION: Known only from Nicaragua, Costa Rica, Panama, Jamaica, and the Virgin Islands.