Mesabolivar rudilapsi Machado et al., 2007

Huber, Bernhard A., 2018, The South American spider genera Mesabolivar and Carapoia (Araneae, Pholcidae): new species and a framework for redrawing generic limits, Zootaxa 4395 (1), pp. 1-178 : 90-91

Mesabolivar rudilapsi Machado et al., 2007

Figs 325–326 , 365–368 , 374–377

Mesabolivar rudilapsi Machado et al. 2007a: 57 , figs 12–18 (♂, Brazil: Santa Catarina).

Note. This species was previously known from the male holotype only. Here I newly describe the female and provide new records from Santa Catarina and Paraná states. The new Santa Catarina record below is within the range of coordinates given for the type specimen (which is lost, see below). A neotype is not designated because this is “a species about whose identity there is no doubt” and I do not see the “exceptional need” and other conditions specified in ICZN (1999), Article 75.2–3.

Diagnosis. (amendments; see Machado et al. 2007a). Females of this species are easily distinguished from known congeners by unique shape of epigynum ( Figs 365–367 ): strongly protruding, with pair of distal humps and large pocket on anterior face.

Type material. BRAZIL: Santa Catarina: ♂ holotype, IBSP (62448), Parque Municipal Nascentes do Ribeirão Garcia (27°01’– 27°06’S, 49°04’– 49°10’W), 290–910 m a.s.l., pitfall trap, 24.x.2004 (R.C. Francisco); not examined (according to Machado 2011, the type has been lost in the Butantan fire of May 2010).

New records. BRAZIL: Santa Catarina: 1♂, ZFMK (Ar 19171), Itajaí National Park (27.049– 27.058°S, 49.083– 49.088°W), Chuva Trail, night collecting at river bank, 300 m a.s.l., 16.x.2014 (B.A. Huber, L.S. Carvalho).

Paraná: 3♂ 4♀, ZFMK (Ar 19172), Saint-Hilaire / Lange National Park, forest along river above Fazenda Niteroi (25.657°S, 48.601°W), ~ 100 m a.s.l., 11.x.2014 (B.A. Huber, L.S. Carvalho) ; 1♀ in pure ethanol, ZFMK (Br 14-131), same data ; 1♀, ZFMK (Ar 19173), same data but night collecting ; 2♀ in pure ethanol, ZFMK (Br 14- 137), same data . 1♂, ZFMK (Ar 19174), Saint-Hilaire / Lange National Park , forest above Hotel Mata Atlântica (25.670°S, 48.600°W), ~ 200–300 m a.s.l., night collecting, 12.x.2014 (B.A. Huber, L.S. Carvalho) . 2♂, SMNK ( ECS 760–61 ), Reserva Natural do Rio Cachoeira [~ 23.38°S, 48.70°W], 19.xi.2007 (F. Raub, L. Scheuermann).

Description (amendments; see Machado et al. 2007a). Tibia 1 in five newly examined males: 9.5–11.2 (mean 10.2). Femora 2 and 3 in some males much wider than other femora, in others barely wider (diameters femora 1–4 in 2 males: 0.12, 0.15, 0.16, 0.13; 0.15, 0.25, 0.23, 0.16). Tip of procursus varies slightly among localities; males from Reserva Natural do Rio Cachoeira with small ventral process between ridges and tip.

Females in general similar to male ( Fig. 326 ); all leg femora approximately same diameter. Tibia 1 in five females: 5.9–7.3 (mean 6.6). Epigynum as in Figs 365–367 , 374–376 , anterior plate strongly protruding, slightly directed towards anterior, with pair of low distal humps and large pocket on anterior face; posterior plate simple. Internal genitalia relatively small, with distinctively shaped and arranged pore-plates ( Figs 368 , 377 ).

Natural history. The spiders were found in small sheltered spaces close to the ground. When disturbed they vibrated vigorously and eventually ran away.

Distribution. Known from three localities in Santa Catarina and Paraná states ( Brazil) ( Fig. 735 ).

Figures

FIGURE 735. Known distribution of the Mesabolivar xingu group.

FIGURES 315–326. Live specimens and habitus photos, Mesabolivar spinulosus group and M. xingu group. 315–318. M. spinulosus (Mello-Leitão, 1939), males from Campina Grande and Furna Feia Cave, females from Queimadas and Pinga Cave (feeding on caterpillar).319. M.murici sp. n., male from Murici. 320–321. M. serrapeladasp. n., male and female from Serra Pelada.322.M.amanayesp.n., male fromMarabá (ZFMK Ar19169).323–324.M.guaycolecsp.n.,male in dorsalandlateral views (CAS 9027305). 325–326.M.rudilapsi Machado et al., 2007, male and female from St. Hilaire/Lange.

FIGURES365–368. Mesabolivar rudilapsi Machado et al., 2007 (ZFMK Ar 19172).365–367.Epigynum, ventral, lateral, and frontal views.368. Cleared female genitalia, dorsal view.Scale lines:0.5.

FIGURES 369–377. Female epigyna and cleared female genitalia, Mesabolivar xingu group. 369–371. M. amanaye sp. n., epigynum in ventral and lateral views, cleared female genitalia in dorsal views (ZFMK Ar 19170).372–373. M. guaycolec sp. n., epigynum in ventral view and cleared female genitalia in dorsal view (CAS 9027305). 374–377. M. rudilapsi Machado et al., 2007, epigynum in frontal, lateral and ventral views, and cleared female genitalia in dorsal view (ZFMK Ar19172).