Gnathonarium luzon, Tanasevitch, Andrei V., 2017

Tanasevitch, Andrei V., 2017, New species and new records of linyphiid spiders from the Indo-Malayan Region (Araneae, Linyphiidae), Zootaxa 4227 (3), pp. 325-346 : 333-334

publication ID

https://doi.org/10.11646/zootaxa.4227.3.2

publication LSID

lsid:zoobank.org:pub:C740FE23-33BC-41D3-9684-C9D845A8EB7B

DOI

https://doi.org/10.5281/zenodo.6027810

persistent identifier

https://treatment.plazi.org/id/03FDD960-F658-8E33-94F7-D9F3E3B4FE9F

treatment provided by

Plazi

scientific name

Gnathonarium luzon
status

new species

Gnathonarium luzon   new species

Figs 4, 5 View FIGURES 1 – 7 , 26–29 View FIGURES 26 – 29

Holotype male ( SMF, ex Roewer Coll. M 907), PHILIPPINES, Luzon   Island , Mt Makiling; no date, Bakes leg. Paratypes   . 1 Male (without palps and legs), 1 male prosoma with left palp, 1 female (SMF), collected together with the holotype.

Etymology. The specific name is a noun in apposition referring to the island where the types were collected.

Diagnosis. The species seems to be most similar to Gnathonarium dentatum ( Wider, 1834)   , differing by the narrower male palpal tibia, as well as by the narrower posterior part of the epigynum. Gnathonarium luzon   n. sp. can be distinguished from all congeners by the longest tooth on the male palpal tibia, as well as by the relatively narrow and long seminal ducts of the epigynum.

Description. Male holotype. Large Erigoninae   , total length 2.80. Carapace slightly modified, as in Fig. 4 View FIGURES 1 – 7 , 1.30 long, 1.00 wide, pale reddish brown. Chelicerae massive, 0.53 long, frontal surface beset with small denticles, mastidion present. Legs yellow. Leg I, 5.25 long (1.50+0.35+1.50+1.10++0.80), IV –? Chaetotaxy unknown, spines mostly lost, but seem to have been 2.2.1.1. TmI unknown: trichobothrium not found. Palp ( Figs 24–28 View FIGURES 19 – 25 View FIGURES 26 – 29 ): Patella with a ventro-apical conical outgrowth. Tibia with a long crescent-shaped process and a large, narrow, pointed tooth at its base. Tegulum elongated, slightly curved, pale, almost transparent. Distal suprategular apophysis flat, long, pointed apically. Radix small, embolus thin, long, making a loop. Abdomen 1.53 long, 0.88 wide, grey dorsally, with a median white stripe.

Female. Total length 2.88. Carapace unmodified, 1.25 long, 0.95 wide, pale brown. Chelicerae 0.58 long, mastidion absent. Legs yellow. Leg I, 5.67 long (1.53+0.38+1.48+1.50+0.78), IV, 5.33 (1.48+0.35+1.40+1.40+0.70). Chaetotaxy unknown, spines mostly lost, but seem to have been 2.2.1.1. TmI unknown: trichobothrium not found. Abdomen 1.78 long, 1.15 wide, grey dorsally, with a white longitudinal stripe narrowing backwards and with two white transverse stripes, the latter sometimes merging. Epigynum as in Figs 5 View FIGURES 1 – 7 , 29 View FIGURES 26 – 29 . Seminal ducts relatively long and narrow.

Distribution. Only known from the type locality in the Philippines.

SMF

Forschungsinstitut und Natur-Museum Senckenberg