Mecolaesthus cachapa Huber

Huber, Bernhard A. & Villarreal, Osvaldo, 2020, On Venezuelan pholcid spiders (Araneae, Pholcidae), European Journal of Taxonomy 718, pp. 1-317: 145-149

publication ID

https://doi.org/10.5852/ejt.2020.718.1101

publication LSID

lsid:zoobank.org:pub:F9E9A91E-488C-4DB1-9361-E788E9AC5BC1

DOI

http://doi.org/10.5281/zenodo.4343901

persistent identifier

http://treatment.plazi.org/id/D71C641C-65D5-4019-9FF0-F8167340859A

taxon LSID

lsid:zoobank.org:act:D71C641C-65D5-4019-9FF0-F8167340859A

treatment provided by

Valdenar

scientific name

Mecolaesthus cachapa Huber
status

sp. nov.

Mecolaesthus cachapa Huber   sp. nov.

urn:lsid:zoobank.org:act:D71C641C-65D5-4019-9FF0-F8167340859A

Figs 508–509 View Figs 506–509 , 523–531 View Figs 523–531 , 548–550 View Figs 545–553 , 1046

Diagnosis

Distinguished from known congeners by details of male pedipalp ( Figs 523–528 View Figs 523–531 ; procursus slender and simple, with widened transparent tip; embolar division of genital bulb distally with large flat sclerite and three small ventral processes), by armature of male chelicerae ( Figs 529–530 View Figs 523–531 ; pair of small frontal apophyses), by epigynum ( Fig. 548 View Figs 545–553 ; anterior plate small, narrowing posteriorly with strong lateral margins; posterior plate wide but short), and by internal female genitalia ( Figs 531 View Figs 523–531 , 550 View Figs 545–553 ): pore plates on distinctively shaped sclerite with pair of rounded anterior sclerites (similar M. trampa Huber   sp. nov.); lateral wing-shaped structures.

Etymology

The species name refers to cachapa   , a Venezuelan dish made from maize flour, traditionally eaten with a soft, mozzarella-like cheese; noun in apposition.

Type material

VENEZUELA   – Aragua • ♂ holotype, ZFMK (Ar 21945), Henri Pittier National Park , forest near La Cumbre (10.3575° N, 67.5771° W), 1450 m a.s.l., 20 Feb. 2020 (B.A. Huber, O. Villarreal M.) GoogleMaps   .

Other material examined

VENEZUELA   – Aragua • 2 ♀♀, together with holotype, ZFMK (Ar 21945), same collection data as for holotype GoogleMaps   1 ♀, ZFMK (Ar 21946), Henri Pittier National Park , NW of Rancho Grande (10.358° N, 67.695° W), ~ 1100 m a.s.l., 11 Dec. 2002 (B.A. Huber) GoogleMaps   .

Description

Male (holotype)

MEASUREMENTS. Total body length 3.6, carapace width 1.6. Distance PME–PME 140 µm; diameter PME 140 µm; distance PME–ALE 130 µm; distance AME–AME 20 µm; diameter AME 30 µm. Leg 1: 45.7 (10.7 +0.5+10.7 + 19.7 +4.1), tibia 2: 6.2, tibia 3: 4.7, tibia 4: 6.1; tibia 1 L/d: 82.

COLOR (in ethanol). Carapace mostly dark ochre to black, with pair of pale bands from behind ocular area to posterior margin; sternum light, with dark brown lateral marginal bands widening and connected posteriorly; legs brown, with darker rings on femora (subdistally) and tibiae (proximally, subdistally), tips of femora and tibiae light; abdomen gray, dorsally and laterally with dark bluish marks, ventrally

with dark mark in gonopore area and dark bluish median mark behind gonopore widening posteriorly; book lung covers not  darkened; abdomen without ventral and dorsal anterior modifications.

BODY. Habitus as in Figs 508–509 View Figs 506–509 . Ocular area moderately raised. Carapace strongly inflated, only anteriorly with deep thoracic groove. Clypeus unmodified. Sternum wider than long (1.1/0.75), unmodified. Abdomen slightly elongated, pointed at spinnerets.

CHELICERAE. As in Figs 529–530 View Figs 523–531 , with pair of small frontal apophyses.

PALPS. In general similar to M. longipes Huber   sp. nov. (cf. Figs 399–400 View Figs 399–400 ); coxa apophysis slightly less prominent; small ventral projection on trochanter slightly wider; distal ventral process of femur slightly more slender; retrolateral trichobothrium on tibia not  in very distal position; tarsal dorsal process bifid, proximal part indistinct; procursus ( Figs 523–525 View Figs 523–531 ) slender and simple, with widened transparent tip; embolar division of genital bulb complex, distally with large flat sclerite and three small ventral processes ( Figs 526–528 View Figs 523–531 ).

LEGS. Without spines and curved hairs; with short vertical hairs in higher than usual density on all femora and tibiae; coxa 4 unmodified; retrolateral trichobothrium of tibia 1 at 3%; prolateral trichobothrium present on all leg tibiae; tarsus 1 with ~60 pseudosegments, mostly distinct.

Female

In general similar to male but carapace not  inflated, leg femora and tibiae with low density of short vertical hairs, sternum lateral dark margins less distinct; tibia 1 in three females: 7.1, 7.6, 8.5. Epigynum ( Fig. 548 View Figs 545–553 ) anterior plate relatively small, narrowing posteriorly, with strong lateral margins; posterior plate wide but short. Internal genitalia ( Figs 531 View Figs 523–531 , 549–550 View Figs 545–553 ) with pore plates on distinctively shaped sclerite, pair of rounded anterior sclerites, and lateral wing-shaped structures.

Distribution

Known from two localities in Henri Pittier National Park, Venezuela   , Aragua (Fig. 1046).

Natural history

At La Cumbre, this species could not  be distinguished in the field from the more abundant M. graphorn Huber   sp. nov.; the observations described there may thus also apply to this species.

ZFMK

Germany, Bonn, Zoologische Forschungsinstitut und Museum "Alexander Koenig"

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig