Enna rioja, Cruz Da Silva, Estevam L., 2013

Cruz Da Silva, Estevam L., 2013, A new Peruvian species of Enna (Araneae, Lycosoidea, Trechaleidae), Zootaxa 3701 (4), pp. 467-470 : 467-470

publication ID

https://doi.org/ 10.11646/zootaxa.3701.4.6

publication LSID

lsid:zoobank.org:pub:D30C8478-F4DB-4820-8080-D760218207EC

DOI

https://doi.org/10.5281/zenodo.6159964

persistent identifier

https://treatment.plazi.org/id/1D04AF10-E23D-FFC1-DAE3-F9D7FA979632

treatment provided by

Plazi

scientific name

Enna rioja
status

sp. nov.

Enna rioja View in CoL new species

Figs 1–7 View FIGURES 1 – 6 View FIGURE 7

Type material: Holotype: female from San Martin, Rioja , Paitoja, Peru [06°03’S, 77°10’W], 10.X.2008, C. Albujar (MUSM 505344). Paratype: one female, same locality, date and collector as holotype, deposited at FMNH.

Etymology. The specific name is a noun in apposition taken from type locality.

Diagnosis. The female of E. rioja sp. nov. resembles those of E. baeza (Silva et al., 2008: 93, figs 78, 79) by the small rounded projection on the head of spermathecae (HS) and E. osaensis (Silva et al., 2012: 57, fig. 6) by the presence of a large accessory spermathecae ( AS) and by the shape of the projected scape (SC) of the middle field of the epigynum (MF), but can be distinguished from both species by the slightly projected lateral lobes (LL) ( Fig. 5 View FIGURES 1 – 6 ) and by the large and conspicuous accessory spermathecae and by the elliptical shape of head of spermathecae (HS) ( Fig. 6 View FIGURES 1 – 6 ).

Note. Ten species of Enna were described from Peru and Enna huanuco Silva, Lise & Carico, 2008 is the only one with the female still unknown. In this paper, the female from San Martin, Peru is described as separate species and not grouped with E. huanuco , since the locations where they have been found are not close together (San Martin and Huanuco , respectively), distant about 400km apart and males and females have not been collected together from the same area. Both species ( E. rioja sp. nov. and E. huanuco Silva, Lise & Carico, 2008 ) also present some morphological differences: carapace colouration ( E. huanuco is dark brown with lateral brownish bands and E. rioja sp. nov. has a dark brown carapace without bands) and carapace dimensions (most Enna males have a longer and wider carapace than females, but the female of E. rioja sp. nov. has a longer and wider carapace compared to the male specimen of E. huanuco ).

Description. Female (Holotype, San Martin, Peru, MUSM 505344). Total length 10.50. Carapace 5.58 long, 4.78 wide, dark brown, fovea marked ( Figs 1, 2 View FIGURES 1 – 6 ). Clypeus dark brown, 0.46 high ( Fig. 4 View FIGURES 1 – 6 ). Anterior eye row straight, 1.51 wide; posterior 2.35 wide ( Fig. 4 View FIGURES 1 – 6 ). Eye diameters, interdistances, and median ocular quadrangle: AME 0.21, ALE 0.18, PME 0.31, PLE 0.18; AME-AME 0.18, AME-ALE 0.16, PME-PME 0.65, PME-PLE 0.49, OQA 0.65, OQP 1.20, OQH 0.71. Chelicerae reddish-brown, bristly ( Fig. 4 View FIGURES 1 – 6 ); promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum yellow, with scattered setae ( Fig. 3 View FIGURES 1 – 6 ); 2.66 long, 2.52 wide. Labium dark brown, yellow distally ( Fig. 3 View FIGURES 1 – 6 ), 1.06 long, 0.93 wide. Legs light brown with dark brown annuli on femora ( Figs 1, 2 View FIGURES 1 – 6 ), relative length: IV-I-II-III, I—femur 6.25/ tibia-patella 8.64/ metatarsus 6.65/ tarsus 2.66/ total 24.20; II—6.38/ 8.37/ 6.11/ 2.55/ 23.41; III—5.18/ 5.45/ 4.12/ 2.12/ 16.87; IV—6.65/ 7.98/ 7.31/ 2.92/ 24.85. Ventral pairs of macrosetae on tibiae: I–4; II–3; III–3; IV–3. Abdomen 4.92 long, gray with two pairs of sigillae ( Fig. 1 View FIGURES 1 – 6 ). Venter light brown, bristly ( Fig. 3 View FIGURES 1 – 6 ). Epigynum with a projected scape (SC) ( Fig. 5 View FIGURES 1 – 6 ). Head of spermathecae (HS) rounded and with a rounded whitish projection ( Fig. 6 View FIGURES 1 – 6 , HS). Accessory spermathecae conspicuous and rounded ( Fig. 6 View FIGURES 1 – 6 , AS).

Distribution. Known only from the type locality ( Peru) ( Fig. 7 View FIGURE 7 ).

Acknowledgments

I wish to thank Diana Silva-Dávila (MUSM) for the loan of the material. The images were taken in Petra Sierwald’s lab at the Field Museum, Robin Delapena (FMNH) graciously helped obtaining the photos of the female genitalia.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Trechaleidae

Genus

Enna

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