Austrohahnia melloleitaoi ( Schiapelli & Gerschman, 1942 ) Schiapelli & Gerschman, 1942

Rubio, Gonzalo D., Lo-Man-Hung, Nancy F. & Iuri, Hernán A., 2014, A revision of the Neotropical genus Austrohahnia Mello-Leitão (Araneae, Hahniidae), Zootaxa 3894 (1), pp. 106-116 : 110-111

publication ID

https://dx.doi.org/10.11646/zootaxa.3894.1.8

publication LSID

lsid:zoobank.org:pub:9354539F-3114-4E14-B218-A1869ED50E12

DOI

https://doi.org/10.5281/zenodo.6130695

persistent identifier

https://treatment.plazi.org/id/03A887F8-FFB1-9252-FF14-F38F20E6EE94

treatment provided by

Plazi

scientific name

Austrohahnia melloleitaoi ( Schiapelli & Gerschman, 1942 )
status

new combination

Austrohahnia melloleitaoi ( Schiapelli & Gerschman, 1942) new combination

Figs 1 View FIGURES 1 A – G ; 3 D–F; 4 A–D; 5

Material examined. ARGENTINA: Córdoba: 1 ♀, Road to Pan de Azúcar hill, S 31.23707 °, W 64.384198 °, 761 m asl, 05.IV. 2001, A. Ceballos leg. (MACN-Ar 30191); Entre Ríos: 1 ♂, 20 km south of Victoria, S 32.759444 °, W 59.93558 °, 31 m asl, 28.II. 1982, S. Roig, A. Roig Alsina & P. Goloboff leg. (MACN-Ar 30190); Río Negro: 4 ♂, 13 ♀, 2 immatures, Viedma, S 40.859706 °, W 63.006858 °, 4 m asl, 15.I. 2013, H.A. Iuri leg. (MACN-Ar 30197–30203).

Diagnosis. Females of A. melloleitaoi resembles A. praestans in having a slightly similar arrangement of copulatory duct and relatively advanced secondary receptacle close to copulatory opening ( Figs 3 E, F View FIGURES 3 A – I ), but can be distinguished from the latter by the flared copulatory opening (not spherical) ( Fig. 3 D View FIGURES 3 A – I ). Austrohahnia melloleitaoi differs from A. catleyi new species in having a different arrangement of copulatory duct, middle stretch of copulatory duct first converge and then diverge ( Figs 3 E, F View FIGURES 3 A – I ; compare with 3 H, I), secondary receptacle close to copulatory opening ( Figs 3 E, F View FIGURES 3 A – I ), a granulated edge on male patellar apophysis ( Fig. 1 F View FIGURES 1 A – G ), and a pale dorsal stripe along the abdomen in both sexes ( Figs 1 A View FIGURES 1 A – G ; 4 A, C–D).

Description. Female (MACN-Ar 30201) ( Figs 3 D–F View FIGURES 3 A – I ; 4 A). Total length 4.20. Carapace 1.85 long, 1.44 wide; abdomen 2.55 long, 1.71 wide. Eye sizes and interdistances: AME 0.11, ALE 0.12, PME 0.11, PLE 0.11. AME–AME 0.04, ALE–ALE 0.24, PME–PME 0.10, PLE–PLE 0.36, AME–PME 0.08, ALE–PLE 0.02. Clypeus height 0.16, clypeus height at AME 0.26. Chelicerae with weak stridulatory files laterally; three promarginal and five retromarginal teeth. Sternum slightly wider than long. Leg measurements: I 4.69 (1.32, 1.52, 1.10, 0.75); II 4.65 (1.30, 1.55, 1.05, 0.75); III 4.47 (1.30, 1.37, 1.05, 0.75); IV 5.93 (1.66, 1.87, 1.50, 0.90). Carapace dark brown, slightly lighter anterior to thoracic fovea and near the margins, borders black. Sternum dark brown, somewhat lighter in the center. Abdomen with a pale yellow stripe of sinuous edges dorsally along the abdomen, without chevrons; ventrally light brown with dark irregular spots. Legs pale yellow with dark brown spots and rings. Epigyne ( Figs 3 D–F View FIGURES 3 A – I ): with two flared copulatory opening, not spherical, located in large atrium close to epigastric furrow; middle stretch of copulatory duct first converge toward the middle and then diverge. The secondary receptacle close to copulatory opening. Variation (n = 17): total length 3.10–4.90, mean 3.76.

Male (MACN-Ar 30199) ( Figs 1 View FIGURES 1 A – G ; 4 C–D). Total length 3.62. Carapace 1.80 long, 1.39 wide; abdomen 2.12 long, 1.37 wide. Eye sizes and interdistances: AME 0.10, ALE 0.12, PME 0.10, PLE 0.10. AME–AME 0.02, ALE–ALE 0.22, PME–PME 0.09, PLE–PLE 0.36, AME–PME 0.07, ALE–PLE 0.01. Clypeus height 0.20, clypeus height at AME 0.29. Chelicerae as in female, except for three promarginal (middle largest) and four small retromarginal teeth. Sternum as in female. Leg measurements: I 5.56 (1.50, 1.75, 1.37, 0.94); II 5.23 (1.46, 1.65, 1.25, 0.87); III 5.11 (1.45, 1.50, 1.34, 0.82); IV 6.40 (1.75, 2.00, 1.70, 0.95). Other characters as in female. Palp ( Figs 1 C–F View FIGURES 1 A – G ): patellar apophysis with a granulated edge; copulatory bulb and embolus with the configuration of the genus ( Fig. 1 D View FIGURES 1 A – G ). Variation (n = 5): total length 3.10–4.40, mean 3.49.

Natural history ( Figs 4 A–D View FIGURES 4 A – H ). Austrohahnia melloleitaoi primarily inhabits litter and builds a small horizontal sheet-web with a retreat in the centre ( Fig. 4 B View FIGURES 4 A – H ), often close to areas with anthropogenic modifications, e.g. under bridges, along waysides. These spiders are very fast and hide rapidly at the slightest disturbance, so they are hard to find among the dry leaves on the ground.

Distribution ( Fig. 5 View FIGURE 5 ). Central and southeast Argentina: in Córdoba, southern Entre Ríos, southern Buenos Aires and eastern Río Negro.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Hahniidae

Genus

Austrohahnia