Kapitia obscura Forster, 1956

Platnick, Norman I., Abrahim, Naiara, Álvarez-Padilla, Fernando, Andriamalala, Daniela, Baehr, Barbara C., Baert, Léon, Bonaldo, Alexandre B., Brescovit, Antonio D., Chousou-Polydouri, Natalia, Dupérré, Nadine, Eichenberger, Beata, Fannes, Wouter, Gaublomme, Eva, Gillespie, Rosemary G., Grismado, Cristian J., Griswold, Charles E., Harvey, Mark S., Henrard, Arnaud, Hormiga, Gustavo, Izquierdo, Matías A., Jocqué, Rudy, Kranz-Baltensperger, Yvonne, Kropf, Christian, Ott, Ricardo, Ramírez, Martín J., Raven, Robert J., Rheims, Cristina A., Ruiz, Gustavo R. S., Santos, Adalberto J., Saucedo, Alma, Sierwald, Petra, Szüts, Tamás, Ubick, Darrell & Wang, Xin-Ping, 2012, Tarsal Organ Morphology and the Phylogeny of Goblin Spiders (Araneae, Oonopidae), With Notes on Basal Genera, American Museum Novitates 2012 (3736), pp. 1-52 : 47-48

Kapitia obscura Forster

Figures 308–329

Kapitia obscura Forster, 1956: 166 , figs. 140–144 (male holotype and female allotype from Kapiti Island, New Zealand, in CMC; examined). – Paquin et al., 2010: 32, figs. 10.1–10.4.

DIAGNOSIS: With the characters of the genus, an abruptly bent embolus (figs. 323–325), and receptacula as in figures 328, 329.

MALE (PBI_OON 26044, figs. 323–327, images of nonsexual characters based on female): Total length 1.26. Cephalothorax: Carapace yellow, without any pattern, ovoid in dorsal view, pars cephalica flat in lateral view (fig. 309), 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 smooth, sides smooth, pars thoracica without depressions, fovea absent, without radiating rows of pits; lateral margin straight, smooth, without denticles; plumose setae near posterior margin of pars thoracica absent (fig. 308). Clypeus margin unmodified, straight in front view, vertical in lateral view, low, ALE separated from edge of carapace by less than their radius, median projection absent. Eyes six, well developed, all subequal, ALE oval, PME oval, PLE circular; posterior eye row recurved from above; ALE separated by their radius to diameter, ALE-PLE touching, PME touching throughout most of their length, PLE-PME touching (fig. 310). Sternum longer than wide, white, uniform in coloration, 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 absent, 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 infracoxal grooves, distance between coxae approximately equal, extensions of precoxal triangles absent, lateral margins unmodified, without posterior hump; setae sparse, light, needlelike, evenly scattered, originating from surface, without hair tufts (fig. 311). Mouthparts white. Chelicerae slightly divergent, without teeth, anterior face unmodified; fangs without toothlike projections, directed medially, shape normal, without prominent basal process, tip unmodified; setae light, needlelike, evenly scattered. Labium rectangular, not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization; with one or two setae on anterior margin, subdistal portion with unmodified setae (fig. 312). Endites distally not excavated, serrula present as single row of teeth, anteromedian tip unmodified, posteromedian part unmodified, same as sternum in sclerotization. Abdomen: Ovoid, without long posterior extension, rounded posteriorly, interscutal membrane rows of small sclerotized platelets absent posteriorly; dorsum soft portions yellow, without color pattern; book lung covers small; pedicel tube short, unmodified, scutopedicel region unmodified, plumose hairs absent, matted setae on anterior ventral abdomen in pedicel area absent, cuticular outgrowths near pedicel absent; dorsal, epigastric, postepigastric and spinneret scuta absent; setae light, needlelike, epigastric area setae not enlarged at base; dense patch of setae anterior to spinnerets absent. Colulus absent. Legs: Yellow, without color pattern; femur IV not thickened, same size as femora I–III, tibia I unmodified, tibia IV specialized hairs on ventral apex absent, tibia IV ventral scopula absent, metatarsi I, II mesoapical comb absent, metatarsi III, IV weak ventral scopula absent. Leg spines absent. Tarsal claws with inner tooth row displaced to tip of claw, inner faces striated, inferior claw absent (figs. 316, 317). Trichobothrial base with arched ridge (fig. 318). Tarsal organs apparently with four receptors on anterior legs, three on posterior legs and palps (figs. 319–322). Genitalia: Epigastric region with sperm pore not visible; furrow without Ω-shaped insertions, without setae. Palp of normal size, not strongly sclerotized, right and left palps symmetrical, proximal segments white; embolus light, prolateral excavation absent; trochanter of normal size, unmodified; femur of 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 with trichobothria; cymbium white, ovoid in dorsal view, not fused with bulb, not extending beyond distal tip of bulb, without stout setae, without distal patch of setae; bulb white, without sclerotized sperm duct (figs. 323, 324), embolus abruptly bent (fig. 325).

FEMALE (PBI_OON 26045, figs. 308–322, 328, 329): Total length 1.63. Palpal tarsus without claw or spines, unmodified, patella without prolateral row of ridges (figs. 313, 314), tibia with three trichobothria (fig. 315). Anterior receptaculum with ventral expansion at base, tip microphone-shaped, posterior receptaculum long, ovoid (figs. 328, 329).

MATERIAL EXAMINED: New Zealand: North Island : Cook Strait: Kapiti Island, May 1947, leaf litter ( R. Forster, CMC 1192 , 1193 , PBI _OON 26044, 26045 ), 1♂, 1♀ (holotype, allotype) ; Nigger Head , Apiti-Utawai, Sept. 28, 1972, roadside (C. Wilton, OMD PBI _OON 26512), 2♀ ; summit, Three Kings , Nov. 28, 1970 (G. Ramsay, OMD PBI _OON 26508), 1♂ .

DISTRIBUTION: The few available records span the full length of the North Island of New Zealand.

Figures

FIGURES 308–322. Kapitia obscura Forster, female. 308. Carapace, dorsal view. 309. Same, lateral view. 310. Same, anterior view. 311. Sternum, ventral view. 312. Labium and endites, ventral view. 313. Palp, prolateral view. 314. Same, retrolateral view. 315. Palpal tibia, dorsal view. 316. Claws of leg II, anterior view. 317. Same, lateral view. 318. Trichobothrial base from metatarsus II, dorsal view. 319. Tarsal organ from leg II, dorsal view. 320. Same, leg III. 321. Same, leg IV. 322. Same, palp.

FIGURES 323–329. Kapitia obscura Forster, male (323–327) and female (328, 329). 323. Left palp, prolateral view. 324. Same, retrolateral view. 325. Embolus, retrolateral view. 326. Habitus, dorsal view. 327. Same, ventral view. 328. Genitalia, ventral view. 329. Same, dorsal view.