Carapoia exigua

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: 151-153

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/160AC713-C6E2-FF1D-2A9C-9F8C372C7D89

treatment provided by

Plazi

scientific name

Carapoia exigua
status

sp. n.

Carapoia exigua  sp. n.

Figs 665–666View FIGURES665–676, 677–682View FIGURES677–682, 711–712View FIGURES 711–720

Diagnosis. Easily distinguished from similar known congeners ( C. djavani  , C. agilis  ) by shape of procursus in dorsal view (small prolateral branch at tip; Fig. 679View FIGURES677–682), by arrangement of frontal cheliceral apophyses ( Fig. 680View FIGURES677–682), by shape of epigynum (anterior plate trapezoidal, posterior margin projecting medially; Fig. 681View FIGURES677–682), and by female internal genitalia (distinctively shaped pore-plates, diverging sclerites between anterior and posterior plates; Fig. 682View FIGURES677–682).

Etymology. The specific name refers to the small size of this species (Latin exiguus, exigua  = small); adjective.

Type material. BRAZIL: Bahia: ♂ holotype, 1♀ paratype, UFMGAbout UFMG (21556–57) and 1♂ paratype, ZFMKAbout ZFMK (Ar 19291), Fazenda Morro de Pedra (12°31.6’–31.8’S, 40°36.1’–36.4’W), 490 m a.s.l., 14.v.2015 (B.A. Huber, L.S. Carvalho).

Other material examined. BRAZIL: Bahia: 2♀ 3 juvs in pure ethanol, ZFMKAbout ZFMK (Br15-184), same data as types. 

Description. Male (holotype)

MEASUREMENTS. Total body length 1.7, carapace width 0.7. Distance PME-PME 50 µm, diameter PME 65 µm, distance PME-ALE 55 µm, distance AME-AME 10 µm, diameter AME 20 µm. Sternum width/length: 0.50/ 0.35. Leg 1: 9.2 (2.2 + 0.2 + 2.5 + 3.5 + 0.8), tibia 2: 1.3, tibia 3: 0.9, tibia 4: 1.2; tibia 1 L/d: 39. Femora 1–4 width (at half length): 0.15, 0.17, 0.18, 0.17.

COLOR (in ethanol). Prosoma and legs pale ochre-yellow, with very indistinct darker rings on legs; abdomen pale gray, not yellowish in heart area, slightly darker in front of gonopore, without darker area in front of spinnerets.

BODY. Habitus as in Fig. 665View FIGURES665–676; ocular area barely raised; carapace with very deep median furrow, carapace humps high; clypeus unmodified; sternum unmodified.

CHELICERAE. As in Fig. 680View FIGURES677–682, with two pairs of small frontal apophyses, apparently provided with one modified hair each.

PALPS. As in Figs 677–678View FIGURES677–682; coxa with small retrolateral apophysis; trochanter barely modified; femur with large retrolatero-ventral process proximally, small dorsal hump, distally widening; procursus proximally arising from widened part of tarsus, very simple, distally with distinctive sclerotized and membranous elements (subdistal prolateral branch; Fig. 679View FIGURES677–682); genital bulb with large mostly membranous process with prolateral pointed sclerite at tip and slender transparent process.

LEGS. Densely covered with short hairs, without spines, without curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 9%; prolateral trichobothrium present on tibia 1; tarsus 1 with ~15 pseudosegments, distally fairly distinct.

Male (variation). Tibia 1 in other male: 2.3.

Female. In general similar to male ( Fig. 666View FIGURES665–676). Tibia 1 in three females: 1.8, 2.0, 2.0. Epigynum as in Figs 681View FIGURES677–682, 711View FIGURES 711–720; anterior plate simple trapezoidal, weakly protruding; with pair of diverging sclerites in membrane behind anterior plate; without posterior plate. Internal genitalia as in Figs 682View FIGURES677–682, 712View FIGURES 711–720, with distinctively shaped pore-plates.

Natural history. Spiders were found running rapidly on the ground. Sometimes they seemed to make small jumps and then they stopped immediately, making them essentially invisible.

Distribution. Known from type locality in Bahia state ( Brazil) only ( Fig. 743View FIGURE 743).

UFMG

Universidade Federal de Minas Gerais

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Carapoia