Nasoona Locket, 1982

Tanasevitch, Andrei V., 2018, A survey of the genus Nasoona Locket, 1982 with the description of six new species (Araneae, Linyphiidae), Revue suisse de Zoologie 125 (1), pp. 87-100 : 88

publication ID

https://doi.org/ 10.5281/zenodo.1196025

DOI

https://doi.org/10.5281/zenodo.5592681

persistent identifier

https://treatment.plazi.org/id/03D087E2-5362-FF98-FEAB-FDF60438F7DD

treatment provided by

Plazi

scientific name

Nasoona Locket, 1982
status

 

Genus Nasoona Locket, 1982 View in CoL View at ENA

Type species: Nasoona prominula Locket, 1982 View in CoL by original designation.

Taxonomic remarks: The genus includes mediumsized erigonines with a variegated abdomen and, in most cases, with a postocular elevation on the male carapace bearing a group of curved, spines, stout spines or setae.

Three species lack this carapace elevation: N. asocialis ( Wunderlich, 1974) View in CoL , N. chrysanthusi Locket, 1982 View in CoL and a new species described below.

The chaetotaxy formula is 2.2.1.1. Two exceptions given in the literature, 1.1. 1.1 in N. coronata ( Simon, 1894) View in CoL and 1.1. 1.1 in the male of N. locketi Millidge, 1995 View in CoL , are mistakes based on incomplete spination caused by partial loss of spines. Each metatarsus is with a trichobothrium, except for N. coronata View in CoL .

The male palp is characterized by the following features: 1) highly modified palpal tibia;

2) poorly expressed distal suprategular apophysis;

3) reduction of median membrane and radix;

4) presence of convector (see Tanasevitch 1998, 2014); 5) presence of an additional sclerite in embolic division, named paraconvector (see Tanasevitch, 2014). At present the paraconvector is only known in Nasoona View in CoL , but most probably this sclerite is more widely present among the Erigoninae. The embolus division of many taxa in this group is still poorly investigated.

The epigyne in Nasoona View in CoL is typical for many erigonines and represented mostly by a shallow epigynal cavity which is sometimes divided by a septum and in a few species partially covered from above by an overhanging, visorlike outgrowth of the anterior epigynal wall. Receptacles are relatively small, subspherical or beanlike.

The position of the genus within the Erigoninae is unclear, but some somatic characters, i.e. chaeto- and trichobothriotaxy, modified male carapace, as well as genitalia conformation show similarity with Gongylidioides Oi, 1960 View in CoL and in part Oedothorax View in CoL .

Species included: Excluding one species which is removed from Nasoona View in CoL , the genus currently comprises 17 species, 6 of them are described as new below.

Distribution: Extreme south of the Palaearctic Region: Nepal Himalayas and southern China; throughout the Oriental Region; Neotropical Region: Venezuela.

Range: Disjunct Oriental-Neotropical.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

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