Loxosceles pallalla, Brescovit & Taucare-Ríos & Magalhaes & Santos, 2017

Brescovit, Antonio D., Taucare-Ríos, Andrés, Magalhaes, Ivan L. F. & Santos, Adalberto J., 2017, On Chilean Loxosceles (Araneae: Sicariidae): first description of the males of L. surca and L. coquimbo, new records of L. laeta and three remarkable new species from coastal deserts, European Journal of Taxonomy 388, pp. 1-20 : 12-14

publication ID	https://doi.org/ 10.5852/ejt.2017.388
publication LSID	lsid:zoobank.org:pub:102DD58C-6F71-495B-8A60-4CFAC10B01B4
DOI	https://doi.org/10.5281/zenodo.6010758
persistent identifier	https://treatment.plazi.org/id/97475BEE-48BC-4AAB-A32C-A4E165B26973
taxon LSID	lsid:zoobank.org:act:97475BEE-48BC-4AAB-A32C-A4E165B26973
treatment provided by	Plazi
scientific name	Loxosceles pallalla
status	sp. nov.

Treatment

Loxosceles pallalla View in CoL sp. nov.

urn:lsid:zoobank.org:act:97475BEE-48BC-4AAB-A32C-A4E165B26973

Figs 7 View Fig. 7 , 8C View Fig. 8 , 10 View Fig. 10

Diagnosis

Loxosceles pallalla sp. nov. can be distinguished from all Loxosceles species by the small tegular base and extremely long embolus with a flattened keel in the male palp ( Fig. 7 View Fig. 7 ). Females can be recognised

by the spermathecae with two receptacles originating from the same short and curved stalk, and the inner spermathecae larger than the outer one ( Fig. 8C View Fig. 8 ).

Etymology

The specific epithet means “flat” in the Aymara language, and refers to the flattened embolus of this species.

Type material

Holotype

CHILE: ♂, IV Región de Coquimbo: Elqui, La Herradura , 30.48333 S, 71.6 W, 80 m a.s.l., 3 Oct. 1992, N. Platnick, P. Goloboff and K. Catley leg. ( AMNH).

GoogleMaps

Paratype

CHILE: ♀, Elqui , 6 km S of Cruz Grande, 29.31667 S, 71.31667 W, 5 m a.s.l., in the sand by the beach, 11 Nov. 1993, N.I. Platnick, K. Catley, M. Ramírez and R.T. Allen leg. ( AMNH).

GoogleMaps

Note

Males and females were matched because they have the same coloration and have leg formula 2413. Also, both males and females have a deviant genital morphology, not fitting in any of Gertch’s speciesgroups.Although this species may be sympatric with Loxosceles coquimbo , the latter are easily separated by the leg formula 4213.

Description

Male (holotype, AMNH)

Carapace orange with cephalic area red brown, lacking the dark-coloured, violin-shaped median band. Chelicerae red brown. Labium, endites and legs orange. Sternum yellow. Palpus red brown. Opisthosoma uniformly grey, with spinnerets orange. Total length 7.2. Caparace 3.4 long, 2.8 wide. Clypeus 0.4 high, with long setae in the border. Eye diameters: ALE 0.16, PME 0.16, PLE 0.18. Sternum 1.7 long, 1.4 wide. Leg I: femur 5.9, patella 1.1, tibia 6.2, metatarsus 6.3, tarsus 1.6, total 21.1. II: 7.1, 1.1, 8.2, 8.3, 1.6, 26.3. III: 5.3, 1.0, 5.0, 5.7, 1.1, 18.1. IV: 6.6, 1.1, 6.2, 7.5, 1.5, 22.9. Leg formula 2431. Palpal femur 2.2 long, 0.4 wide. Palpal tibia 1.1 long, 0.8 wide. Palp with short cymbium, half the length of tibia, tibia short, enlarged ( Fig. 7A–B View Fig. 7 ); tegular base as large as the cymbium, embolus extremely long, coiled near base and flattened in all extension, except the slender tip ( Fig. 7C–D View Fig. 7 ).

Female (paratype, AMNH)

Colour as in male. Total length 8.6. Caparace 3.3 long, 3.0 wide. Clypeus 0.4 high, as in male. Eye diameters: ALE 0.16, PME 0.16, PLE 0.16. Sternum 1.8 long, 1.5 wide. Leg I: femur 5.4, patella 1.2, tibia 5.7, metatarsus 5.3, tarsus 1.3, total 18.9. II: 6.0, 1.2, 6.2, 6.1, 1.4, 20.9. III: 5.2, 1.1, 4.6, 4.9, 1.2, 17.0. IV: 5.9, 1.2, 5.6, 6.3, 1.4, 20.4. Leg formula 2413. Palp tarsus 1.3 long, narrow. Spermathecae small, positioned farther apart, without a single sclerotised base ( Fig. 8C View Fig. 8 ).

Distribution

Known only from the Coquimbo Region, Chile ( Fig. 10 View Fig. 10 ).