Mesabolivar amanaye, 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 : 86

publication ID

https://doi.org/ 10.11646/zootaxa.4395.1.1

publication LSID

lsid:zoobank.org:pub:B43C234D-45C4-4A6D-9836-8A7524A5B291

DOI

https://doi.org/10.5281/zenodo.5950584

persistent identifier

https://treatment.plazi.org/id/160AC713-C621-FFD0-2A9C-9F8C373C7FDB

treatment provided by

Plazi

scientific name

Mesabolivar amanaye
status

sp. nov.

Mesabolivar amanaye View in CoL sp. n.

Figs 322 View FIGURES 315–326 , 352–358 View FIGURES 352–358 , 369–371 View FIGURES 369–377

Diagnosis. Easily distinguished from most known congeners by strong ridges ventrally on procursus ( Fig. 353 View FIGURES 352–358 ); from the only similar known species ( M. xingu ) by armature of male chelicerae (pair of hooked proximal apophyses, only one pair of lateral apophyses; compare Fig. 355 View FIGURES 352–358 and Huber 2000: fig. 904). Females differ from congeners by shape of epigynum ( Figs 356–357 View FIGURES 352–358 ): strongly protruding, oval in ventral view, with pair of small humps and median pocket on process of posterior rim; the female of M. xingu is unknown.

Etymology. The specific name honors the Amanayé, a Tupi-Guaranian people in northeastern Brazil, living between the cities of Belém and Brasília in the state of Pará; noun in apposition.

Type material. BRAZIL: Pará: ♂ holotype, 1♀ paratype, UFMG (21518–19), 4♂ 3♀ paratypes, ZFMK (Ar 19169–70), Marabá, forest near road, ‘site 2’ (5.360°S, 49.058°W), 120 m a.s.l., 10–11.x.2016 (B.A. Huber, L.S. Carvalho).

Other material examined. BRAZIL: Pará: 2♂ 2♀ in pure ethanol, ZFMK (Br 16-244), same data as types . 2♀ in pure ethanol, ZFMK (Br16-239), Marabá, forest near road, ‘site 1’ (5.414°S, 49.074°W), 140 m a.s.l., 7– 8.x.2016 (B.A. Huber, L.S. Carvalho).

Description. Male (holotype)

MEASUREMENTS. Total body length 3.2, carapace width 1.45. Distance PME-PME 120 µm, diameter PME 120 µm, distance PME-ALE 80 µm, distance AME-AME 30 µm, diameter AME 55 µm. Sternum width/length: 0.95/ 0.60. Leg 1: 34.5 (9.1 + 0.5 + 9.0 + 14.0 + 1.9), tibia 2: 6.0, tibia 3: 4.5, tibia 4: 5.8; tibia 1 L/d: 67. Femora 1–4 width (at half length): 0.23, 0.24, 0.22, 0.21.

COLOR (in ethanol). Carapace ochre-yellow, with light brown margins and wide dark brown median band including ocular area; clypeus light brown; sternum ochre-yellow, labium light brown; legs brown, without dark rings, femora and tibiae distally lighter; abdomen greenish gray, dorsally and laterally densely covered with dark internal marks, ventrally with orange-brown plate in front of gonopore.

BODY. Habitus as in Fig. 322 View FIGURES 315–326 ; ocular area raised; carapace with distinct median furrow; clypeus with sclerotized rim but otherwise unmodified; sternum unmodified.

CHELICERAE. With pair of diverging hooked apophyses proximally, pair of small pointed apophyses in midsection, and pair of straight apophyses distally close to laminae ( Figs 354–355 View FIGURES 352–358 ).

PALPS. As in Figs 352–353 View FIGURES 352–358 ; coxa with strong retrolateral apophysis curved towards distal; trochanter barely modified; femur with retrolateral process proximally, distally strongly widening; tibia-tarsus joints shifted in clockwise direction in distal view; tarsus with dorsal process; procursus with 8–9 strong ventral ridges, distally with membranous and sclerotized elements; genital bulb with distinct apophysis lodged at tarsal process, bulbal process mostly membranous, with rounded ventral hump at basis.

LEGS. Without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium present on tibia 1; tarsus 1 with ~25 pseudosegments, distally distinct.

Male (variation). Tibia 1 in four other males: 9.6, 10.1, 10.2, 10.2.

Female. In general similar to male. Tibia 1 in three females: 6.8, 7.7, 7.7. Epigynum as in Figs 356–357 View FIGURES 352–358 , 369– 370 View FIGURES 369–377 ; anterior plate strongly protruding, with pocket on median process and pair of small lateral processes; posterior plate simple. Internal genitalia as in Figs 358 View FIGURES 352–358 , 371 View FIGURES 369–377 , with large pore-plates.

Natural history. The spiders were found in sheltered spaces among tree buttresses.

Distribution. Known from type locality in Pará state ( Brazil) only ( Fig. 735 View FIGURE 735 ).

UFMG

Universidade Federal de Minas Gerais

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Mesabolivar

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