Mesabolivar mimoso, 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 : 55-56

Mesabolivar mimoso sp. n.

Figs 209–214 , 243–244

Diagnosis. Distinguished from similar relatives ( M. cyaneomaculatus , M. madalena , M. claricae , M. inmanis ) by combination of: armature of male chelicerae ( Figs 209–210 ; presence of distinct proximal apophyses, in contrast to M. cyaneomaculatus and M. claricae ); procursus tip with short prolateral apophysis ( Fig. 211 ; in contrast to M. madalena and M. inmanis ); by indistinct epigynal pocket bordered by pair of low humps ( Figs 213 , 243 ).

Etymology. The specific name is derived from the type locality; noun in apposition.

Type material. BRAZIL: Espírito Santo: ♂ holotype, MNRJ (14312), 1♂ 1♀ paratypes, ZFMK (Ar 19069), Mimoso do Sul, Finca Tacutinga, forest fragment (21°01.4’S, 41°23.4’W), 240 m a.s.l., 4.x.2010 (B.A. Huber, A. Pérez-González).

Other material examined. BRAZIL: Rio de Janeiro: 1♂ 1♀, ZFMK (Ar 19070), Paraty , degraded forest near Morro do Forte (23°11.7’S, 44°42.8’W), ~ 10–30 m a.s.l., 23.viii.2007 (B.A. Huber) ; 2♀ in pure ethanol, ZFMK (Br 07/100-34), same data . 1♀ in pure ethanol, ZFMK ( RJ15 ), Parque Nacional da Restinga de Jurubatiba [~ 22.18°S, 41.48°W], iii.2011 (A. Pérez-González, G. Cardoso).

Description. Male (holotype)

MEASUREMENTS. Total body length 3.5, carapace width 1.4. Distance PME-PME 120 µm, diameter PME 150 µm, distance PME-ALE 120 µm, distance AME-AME 25 µm, diameter AME 60 µm. Sternum width/length: 0.95/ 0.65. Leg 1: 50.4 (12.7 + 0.5 + 12.3 + 22.1 + 2.8), tibia 2: 8.8, tibia 3: 5.1, tibia 4: 8.0; tibia 1 L/d: 95. Femora 1–4 width (at half length): 0.16, 0.19, 0.22, 0.17.

COLOR (in ethanol). Carapace ochre-orange with large brown median mark including posterior part of ocular area; sternum ochre-orange; legs light brown, tips of femora and tibiae lighter (whitish), without dark rings; abdomen greenish gray, dorsally and laterally densely covered with dark marks, ventrally with light orange-brown plate 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 two pairs of frontal apophyses, one pair proximal, rounded, one pair distal near median line, pointed ( Figs 209–210 ).

PALPS. In general very similar to M. cyaneomaculatus (cf. Huber 2000: figs 813, 816), proximal segments apparently identical in shape and size; procursus prolateral apophysis shorter ( Figs 211–212 ); bulbal process very similar to M. cyaneomaculatus .

LEGS. Without spines, without curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 2.5%; prolateral trichobothrium present on tibia 1; tarsus 1 with>40 pseudosegments, distally fairly distinct.

Male (variation). Tibia 1 in other male: 12.3 (missing in third male).

Female. In general similar to male but all leg femora approximately same width. Tibia 1 in one female: 9.2 (missing in other females). Epigynum as in Figs 213 , 243 ; anterior plate semicircular, with indistinct median pocket (rather a depression without clear margins), and pair of low lateral humps; simple large posterior plate. Internal genitalia as in Figs 214 , 244 , with pair of large pore-plates in tent-shaped lateral position, converging anteriorly.

Distribution. Known from three localities in Espírito Santo and Rio de Janeiro states ( Brazil) ( Fig. 727 ).

Figures

FIGURES206–214. Mesabolivar bico sp. n. (206–208, ZFMK Ar 19065) and M.mimoso sp. n. (209–214, ZFMK Ar 19069). 206–207. Epigynum ventral and lateral views. 208. Cleared female genitalia, dorsal view. 209–210. Male chelicerae, frontal and lateral views. 211–212. Tip of left procursus, prolateral and dorsal views. 213. Epigynum, ventral view. 214. Cleared female genitalia, dorsal view.Scale lines:0.5 (206–210, 213–214), 0.3 (211–212).

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.