The South American spider genera Mesabolivar and Carapoia (Araneae, Pholcidae): new species and a framework for redrawing generic limits
Author
Huber, Bernhard A.
text
Zootaxa
2018
2018-03-19
4395
1
1
178
journal article
30485
10.11646/zootaxa.4395.1.1
8bee84d8-4a01-4e53-8eb3-af176ce1feb9
1175-5326
1202519
B43C234D-45C4-4A6D-9836-8A7524A5B291
Mesabolivar amanaye
sp. n.
Figs 322
,
352–358
,
369–371
Diagnosis.
Easily distinguished from most known congeners by strong ridges ventrally on procursus (
Fig. 353
); 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
and Huber 2000: fig. 904). Females differ from congeners by shape of epigynum (
Figs 356–357
): 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
; 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
).
PALPS. As in
Figs 352–353
; 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
,
369– 370
; anterior plate strongly protruding, with pocket on median process and pair of small lateral processes; posterior plate simple. Internal genitalia as in
Figs 358
,
371
, 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
).