Mesabolivar claricae, Huber, 2018

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 : 62-63

Mesabolivar claricae sp. n.

Figs 233–240 , 251–252

Diagnosis. Distinguished from most known congeners by armature of male chelicerae ( Figs 238–239 ; one pair of frontal apophyses near median line), shape of procursus ( Figs 233–235 ; widely curved, distinctive distal structures, without prolateral apophysis), and shape of epigynum ( Figs 236–237 , 251 ; trapezoidal anterior plate with pair of apophyses and median pocket); from the very similar to M. cyaneomaculatus by shorter and wider procursus with different distal elements (compare Figs 227–229 and 233–235 ), and by smaller epigynum without anterior pair of low humps (compare Figs 230–232 and 236–237 ).

Etymology. Named for Clarice Lispector (1920–1977), Brazilian writer, daughter of Russian-Jewish immigrants, author of Perto do coração selvagem.

Type material. BRAZIL: Rio de Janeiro: ♂ holotype, 1♀ paratype, MNRJ (14315), 6♂ 19♀ paratypes, ZFMK (Ar 19082–83), Santa Maria Madalena, forest fragment (21°58.9’–59.1’S, 41°57.2’–57.6’W), 480–590 m a.s.l., 30.ix.–1.x.2010 (B.A. Huber, A. Pérez-González).

Other material examined. BRAZIL: Rio de Janeiro: 4♀ in pure ethanol, ZFMK (Br 10-78), same data as types . 3♂ 4♀, ZFMK (Ar 19084), Cachoeiras de Macacu, Reserva Ecológica de Guapiaçú (22°24.4’–25.3’S, 42°44.2’–44.3’W), 140–280 m a.s.l., 23.ix.2009 (B.A. Huber, A. Giupponi) ; 1♂ in pure ethanol, ZFMK ( Br 09- 101), same data but 23–24.ix.2009 (B.A. Huber) ; 2♂, ZFMK ( Ar 19085), same data but 25.ix.2009 (B.A. Huber) ; 2♂ 2♀, ZFMK ( Ar 19086), same locality at 22°24.3’S, 42°44.1’W, ~ 300–400 m a.s.l., 24.ix.2009 (B.A. Huber, A. Giupponi).

Description. Male (holotype)

MEASUREMENTS. Total body length 3.7, carapace width 1.35. Distance PME-PME 110 µm, diameter PME 150 µm, distance PME-ALE 100 µm, distance AME-AME 40 µm, diameter AME 45 µm. Sternum width/length: 1.0/ 0.65. Leg 1: 57.6 (13.7 + 0.5 + 13.5 + 26.8 + 3.1), tibia 2: 8.7, tibia 3: 5.5, tibia 4: 8.3; tibia 1 L/d: 104. Femora 1– 4 width (at half length): 0.17, 0.23, 0.23, 0.17.

COLOR (in ethanol). Carapace ochre-orange with large brown median mark including posterior part of ocular area, with pair of light marks laterally behind ocular area; sternum orange-brown; legs brown, tips of femora and tibiae lighter yellowish, without dark rings; abdomen greenish gray, dorsally and laterally densely covered with dark marks, ventrally with orange-brown area in front of gonopore, very indistinct plate in front of spinnerets.

BODY. Habitus very similar to M. cyaneomaculatus (cf. Figs 148–149 ); ocular area raised; carapace with distinct median furrow; clypeus unmodified; sternum unmodified.

CHELICERAE. With one pair of frontal apophyses close to median line ( Figs 238–239 ).

PALPS. In general very similar to M. cyaneomaculatus (cf. Huber 2000: figs 813, 816), proximal segments apparently identical in shape but slightly smaller (see Variation below); procursus distal part (after bend) clearly shorter and wider, with different distal elements ( Figs 233–235 ); bulbal process in general very similar to M. cyaneomaculatus but clearly shorter (length about 0.4 vs. 0.6).

LEGS. Without spines, without curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium present on tibia 1; tarsus 1 with>40 pseudosegments, distally fairly distinct.

Male (variation). Tibia 1 in nine other males: 12.4–14.1 (mean 13.2). Palpal femur length 0.60–0.62 (vs. 0.67– 0.73 in M. cyaneomaculatus ).

Female. In general similar to male but all leg femora approximately same width. Tibia 1 in 14 females: 8.7– 10.3 (mean 9.5). Epigynum as in Figs 236–237 , 251 ; anterior plate trapezoidal, with pair of short processes (slightly variable in size even within localities) and median pocket near posterior margin; simple posterior plate. Internal genitalia as in Figs 240 , 252 , with V-shaped (or U-shaped) sclerite and pair of large pore-plates in tentshaped lateral position, converging anteriorly.

Distribution. Known from two localities in Rio de Janeiro state ( Brazil) ( Fig. 728 ).

Figures

FIGURES 227–240. Mesabolivar cyaneomaculatus (Keyserling, 1891) (227–232; ZFMK Ar 19074–75, 19078) and M. claricae sp. n. (233–240; ZFMK Ar 19082–83). 227–229, 233–235. Left procursi, prolateral, dorsal, and retrolateral views. 230–232, 236–237.Epigyna, ventral and lateral views, females from Penedo (230–231, ZFMK Ar 19075), Paraty (232, ZFMK Ar 19078), and Santa Maria Madalena (236–237, ZFMK Ar 19083). 238–239. Male chelicerae, frontal and lateral views. 240. Cleared female genitalia, dorsal view. Scale lines: 0.3 (227–229, 233–235; all procursi at same scale), 0.5 (230–232, 236–240; all epigyna at same scale).

FIGURES241–252. Femaleepigyna in ventral views and cleared female genitalia in dorsal views, Mesabolivar togatus group (part2). 241–242.M.bico sp. n. (ZFMK Ar19065).243–244.M.mimoso sp. n. (ZFMK Ar 19069).245–246. M.madalenasp. n. (ZFMK Ar 19071). 247–248. M. inmanis sp. n. (ZFMK Ar 19072). 249. M. sp. (“sp. 7” in Astrin et al. 2006) (Br03/100- 14b). 250.M.cyaneomaculatus (Keyserling, 1891) (ZFMK Ar 19075). 251–252.M. claricae sp. n. (ZFMK Ar 19083).

FIGURES 138–149. Live specimens, Mesabolivar togatus group. 138–139. M. togatus (Keyserling, 1891), males from Sooretama (with Arachnocoris bug; arrow) and Santa Maria Madalena. 140. M. baianus sp. n., male from Serra Bonita. 141– 142. M. similis sp. n., male and female from Morro de Pedra.143–144. M. buraquinho sp. n., male from Bonito, female from Mata do Buraquinho.145–146.M.caiporaHuber, 2015,male and femalefrom Serra daItabaiana.147. M.inmanis sp. n., male from Vargem Alta.148–149.M.cyaneomaculatus (Keyserling, 1891), males from Penedo.

FIGURES726–729. Knowndistribution of the Mesabolivar togatusgroup.“?”: dubious recordsof M.togatus, possible record of M. baianus (sub. M. togatus in Machado 2007), and of M. cyaneomaculatus from Paraná (Mello-Leitão 1947b); asterisk: erroneous record of M.togatusfrom Pará in Mello-Leitão (1940a).TL, type locality.