Loxosceles guayllabamba Duperre & Tapia, 2024

Duperre, Nadine, Harms, Danilo, Crespo-Perez, Veronica & Tapia, Elicio, 2024, Two new species of the spider genus Loxosceles (Araneae, Sicariidae) from the Ecuadorian Andes, Evolutionary Systematics 8 (1), pp. 1-14 : 1

publication ID	https://dx.doi.org/10.3897/evolsyst.8.107213
publication LSID	lsid:zoobank.org:pub:651A3097-53FE-49F9-8B75-5C5D8AF189F1
persistent identifier	https://treatment.plazi.org/id/995F5DC9-D2B3-4343-B116-882131BF0B51
taxon LSID	lsid:zoobank.org:act:995F5DC9-D2B3-4343-B116-882131BF0B51
treatment provided by	Evolutionary Systematics by Pensoft
scientific name	Loxosceles guayllabamba Duperre & Tapia
status	sp. nov.

Treatment

Loxosceles guayllabamba Duperre & Tapia sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 9A, B, G View Figure 9 , Map 1 View Map 1

Type material.

Male holotype from Ecuador, Pichincha Province, Quito, Lirios de Carcelen (-00.083424, -78.456323) 2586 m, 17 Nov. 2019, hand collected in holes and under rocks in dry area, E. Tapia, De Rossi Tapia, ECFN 3678 (QCAZ). Paratypes: same data as holotype: 1♀, ECFN 2777 (QCAZ); 1♂, ECFN 3677 (QCAZ); 1♀ ECFN 7773 (QCAZ) 2♀, ECFN 7768 7769 (QCAZ); 2♀1♂ ECFN 7764 (AMNH); 3♀ ECFN 7766 7772 (ZMH-A0014267, A0014268, A0014270); 2♂3juv., hand collected in house, E. Tapia, De Rossi Tapia,(ZMH-A0014271); 1♂, hand collected in garage, E. Tapia, De Rossi Tapia, ECFN 3676 (ZMH-A0015445); 1♂ ECFN 7762 (ZMH-A0014269); 1♀1♂ (USNM); 1♀1♂ (MCZ).

Other material examined.

Ecuador: Pichincha: Bosque Protector Jerusalem (00.000075, -78.355095) 7♂ 10♀, collected under rocks, dead trees, old tree bark and old Agave leaves, 23.XII.2022, E. E. Tapia (QCAZ, ZMH-A0019764, 19765, USNM); Quito , Lirios de Carcelen (-00.083424, -78.456323) 2586 m, 17 Nov. 2019, 2juv., hand collected in holes and under rocks in dry area, E. Tapia, De Rossi Tapia (ZMH-A0015443, A0015444); 3♂ 2♀ 5juv., ECFN 7761 7763 7765 7767 7771 7774 7937 7938 (DTC). Imbabura : Pimapiro [00°24'20.25"N, 77°56'20"W] 2038 m, 5 Jan 2003, 1♂ 1♀, R. Cardenas (QCAZ) GoogleMaps .

Diagnosis.

Males most resemble L. rufipes (Lucas, 1834) and L. lutea Keyserling, 1877 but are distinguished as such: from L. rufipes by their shorter, non-sinuous embolus (Fig. 2A, B, D View Figure 2 ) while in the latter the embolus is long and sinuous (see Gertsch and Ennik 1983: fig. 335); from L. lutea by their palpal tibia not thickened in basal third and femur longer (6.5 × longer than wide) (Fig. 2A, B View Figure 2 ), while palpal tibia thicker in basal third (Fig. 8A, B View Figure 8 ; Gertsch 1967: plate 19, fig. 1) and 4.2 × longer than wide ( Gertsch 1967: 166). Females most resemble L. alicea Gertsch, 1967, L. lutea , and L. binfordae sp. nov. but are distinguished by their short spermathecae (as long as wide) with wide bases and small pointed outer lobes (Fig. 3A-D, G, H View Figure 3 ); while L. alicea Gertsch, 1967 has spermathecae without outer lobes ( Gertsch 1967: plate 10, fig. 11); L. lutea has elongated (1.3 × longer than wide) and constricted spermathecae (Fig. 7G, H View Figure 7 ) and L. binfordae sp. nov. has shorter (0.6 × longer than wide) spermathecae with wide outer lobes (Fig. 6A-D, G, H View Figure 6 ).

Description.

Male (holotype): Total length: 6.06; carapace length: 2.7; carapace width: 2.28; abdomen length: 3.36.

Cephalothorax. Carapace light yellow-brown, piriform, with darker red-brown pars cephalica dorsally (Fig. 1A View Figure 1 ); clypeus 0.22, light brown. Sternum light yellow, longer than wide; labium light yellow, trapezoidal, fused to sternum; endites yellow, white apically; longer than wide (Fig. 1B View Figure 1 ).

Chelicerae. Orange-brown; fused basally, with chelated chelicerae laminae; stridulatory organ well developed with ~34 files; fangs orange-brown, paler distally.

Eyes. Six eyes in three diads; PME: 0.12, ALE: 0.14, PLE: 016, PLE-PLE: 0.77 (Fig. 1A View Figure 1 ).

Abdomen. Dorsally grayish, elongated oval (Fig. 1A View Figure 1 ); ventrally light gray (Fig. 1B View Figure 1 ); colulus triangular.

Legs. Light yellow (Fig. 1A, B View Figure 1 ). Legs measurements: I 15.18 (4.10/0.73/4.49/4.59/1.27); II 18.32 (4.54/0.76/5.21/-5.27/1.54); III 13.37 (3.78/0.61/3.66/4.02/1.30); IV 15.45 (4.15/0.75/4.28/4.81/1.46). Leg formula: 2413.

Palp. Femora light yellow, long and thin (1.91 length/0.29 width = 6.5 ×) with stridulatory pick basally (Fig. 2A View Figure 2 ); patellae light yellow; tibiae light yellow, (1.07 length /0.56 width = 1.9 ×) long and thick, almost straight dorsally, thicker mid-ventrally; tarsus dark reddish orange (Fig. 2A, C View Figure 2 ). Palp bulb oval, with evenly, tightly curved embolus (Fig. 2B, D View Figure 2 ); tip of embolus not twisted (Fig. 9A, B View Figure 9 , arrow).

Female (paratype): Total length: 8.03; carapace length: 3.27; carapace width: 2.7; abdomen length: 4.76.

Cephalothorax. Carapace red-brown, piriform; darker brown along radiation lines and fovea (Fig. 1C View Figure 1 ); clypeus 0.26, dark brown. Sternum orange, longer than wide; labium reddish-brown, trapezoidal, fused to sternum; endites reddish-brown, white apically; longer than wide (Fig. 1D View Figure 1 ).

Chelicerae. Dark reddish-brown; fused basally, with chelated chelicerae laminae; stridulatory organ well developed with ~29 files; fangs reddish-brown, paler distally.

Eyes. Six eyes in three diads; PME: 0.14, ALE: 0.16, PLE: 016, PLE-PLE: 0.98 (Fig. 1C View Figure 1 ). Abdomen. Dorsally grayish, elongated oval (Fig. 1C View Figure 1 ); ventrally light gray; colulus triangular (Fig. 1D View Figure 1 ).

Legs. Orange-brown (Fig. 1C, D View Figure 1 ). Legs measurements: I 13.73 (3.68/0.79/4.08/3.88/1.30); II 15.33 (4.42/0.88/4.59/4.03/1.41); III missing; IV 15.11 (4.41/0.87/3.93/4.52/1.38). Leg formula: 241-.

Palp. Femur light orange with basal stridulatory pick; patellae light orange; tibia and tarsus dark reddish brown.

Genitalia. Spermathecae elongated, apically rounded; as long as wide (1 ×); with small pointed outer lobe (Fig. 3A View Figure 3 , arrow); bases of spermathecae wide (Fig. 3A-D, G, H View Figure 3 ).

Etymology.

The specific name is a noun in apposition taken from the region where the species was collected, Guayllabamba parish.

Distribution.

Ecuador, Imbabura and Pichincha provinces.

Natural history.

Specimens were collected between 2038-2586 m in the inter-Andean valley. Most specimens were collected under rocks, debris, in between leaves of dead Agave plants, and a few specimens were collected in a house or in adjacent garage (Fig. 10 View Figure 10 ).