Mesabolivar caipora Huber, 2015

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 : 52

Mesabolivar caipora Huber, 2015

Figs 145–146 , 186–187 , 198–199

Mesabolivar caipora Huber, 2015: 7 –8, figs 10, 52–54 (♂ only; ♀ misidentified, see Note below; Brazil: Bahia).

Note. In the original description of this species, females were explicitly assigned with hesitation, and newly collected larger samples of males and females (see below) show that this assignment was wrong. The identity of the females assigned to M. caipora in Huber (2015) remains unclear (see Note under description of M. baianus ).

Diagnosis. (amendments; see Huber 2015). Males are easily distinguished from known congeners by unique cheliceral armature (Huber 2015: fig. 54; distinctive oblique processes similar to M. togatus but without proximal modification). Male palps appear indistinguishable from those of M. buraquinho . Females differ from most known congeners by round sclerotized depression on anterior epigynal plate ( Fig 186 , 198–199 ); they are barely distinguishable from females of M. buraquinho (compare Figs 184 and 186 ; median depression apparently consistently slightly larger in M. caipora ).

Type material. BRAZIL: Bahia: ♂ holotype, IBSP (166455), 1♂ paratype, ZFMK (Ar 12619), Mata de São João (12°28.1’– 12°28.3’S, 38°13.5’– 38°14.7’W), ~ 110 m a.s.l., 8.x.2011 (B.A. Huber, A. Pérez-González, M. Alves Dias).

New records. BRAZIL: Bahia: 1♀, ZFMK (Ar 19060), Mata de São João , ‘site 1’ (12°28.3’S, 38°14.7’W), ~ 110 m a.s.l., 8.x.2011 (B.A. Huber, A. Pérez-González, M. Alves Dias).

Sergipe: 4♂ 4♀, ZFMK (Ar 19061–62), near Santa Luzia do Itanhy, Mata do Crasto (11°22.70’S, 37°25.10’W), 20 m a.s.l., 15.v.2015 (B.A. Huber, L.S. Carvalho) ; 2♀ in pure ethanol, ZFMK (Br 15-187), same data . 13♂ 4♀, ZFMK (Ar 19063–64), Parque Nacional de Itabaiana (10°45.8’–46.0’S, 37°20.4’W), 170–220 m a.s.l., 16.v.2015 (B.A. Huber, L.S. Carvalho) ; 2♀ in pure ethanol, ZFMK (Br 15-189), same data .

Description (amendments; see Huber 2015). Tibia 1 in 16 newly examined males: 10.4–13.3 (mean 11.9). Femora 2 and 3 in some males much wider than other femora, in others barely wider. In males from Sergipe, the cheliceral apophyses are slightly less diverging proximally: distance between apophyses proximally (outer margin) in six males from Sergipe: 240–280 µm; in male paratype from Bahia: 320 µm.

Females in general similar to males but all femora same diameter; tibia 1 in seven females: 7.6–10.3 (mean 8.8). Epigynum anterior plate with dark but shallow median sclerotized depression. Internal genitalia as in Fig. 187 , with pair of large pore-plates in tent-shaped lateral position, converging anteriorly; arc-shaped ‘valve’ projects beyond anterior margin of epigynal plate, in some females visible in ventral view through cuticle.

Natural history. The spiders were found in large (up to 30 cm diameter) rather flat webs close to the ground, in well sheltered spaces under logs and in hollow trees.

Distribution. Known from three localities in northeastern Bahia and Sergipe states ( Brazil) ( Fig. 727 ).

Figures

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.

FIGURES 184–187. Mesabolivar buraquinho sp. n. (184–185, ZFMK Ar 19042) and M. caipora Huber, 2015 (186: ZFMK Ar 19062; 187: ZFMK Ar 19060). Epigyna, ventral views, and cleared female genitalia, dorsal views.Scale lines:0.3.

FIGURES188–199. Femaleepigyna in ventral views and cleared female genitalia in dorsal views, Mesabolivar togatus group (part 1). 188–190.M.togatus (Keyserling, 1891), from Guapiaçú (188–189, ZFMK Ar 19017) and Sooretama (190, ZFMK Ar 19029).191–193.M.baianus sp. n., from Una (191–192, ZFMK Ar 19031) and Serra Bonita (193, ZFMK Ar 19038). 194.M. similis sp. n. (ZFMK Ar 19039). 195–196. M. camacan sp. n. (ZFMK Ar 19040). 197. M. buraquinho sp. n. (ZFMK Ar 19042).198–199.M.caiporaHuber, 2015, from São João (198, ZFMK Ar19062) and Mata do Crasto (199, ZFMK Ar 19060).

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.