Gastromicans australis ( Badcock, 1932 ) comb., 2023

Sherwood, Danniella, Nada, MarÍ ́ a Florencia & Pet, Brogan L., 2023, One step forward and two steps back: on three jumping spiders described by H. D. Badcock deposited in the Natural History Museum, London, and two species newly recorded for Argentina (Araneae: Salticidae), Peckhamia 298 (1), pp. 1-9 : 3-5

publication ID 10.5281/zenodo.8006064

publication LSID


persistent identifier

treatment provided by


scientific name

Gastromicans australis ( Badcock, 1932 ) comb.


Gastromicans australis ( Badcock, 1932) comb. nov.

Mirandia australis Badcock, 1932: 47 View in CoL , fig. 39 (♀).

Type material. Holotype ♀ ( BMNH 1932.9.2.77), Miranda , Paraguayan Chaco [now in Mato Grosso do Sul, Brazil], 06/09/1926, coll. G. S. Carter examined.

Other material examined. 1 ♀ (CARTROUNNE 8953), Argentina: Chaco: General San MartÍń: Parque Provincial Pampa del Indio (26°16'25"S, 59°58'39"N), coll . Nadal, Rubio, Zanone, et al., 7 December 2017.

Diagnosis. Gastromicans australis comb. nov. resembles other Gastromicans species in having a recurved anterior eye row, ocular quadrangle wider than long, short vertical chelicerae, long narrow pedipalps, and numerous leg spines. This species resembles G. albopilosa in having chelicerae with a bicuspid retrolateral tooth, a small prolateral tooth, and a small medial tooth, but differs by having shorter insemination ducts with a different arrangement.

1932.9.2.77). 3, Habitus, dorsal view. 4, Habitus, latero-ventral view (not placed into full ventral view due to fear that multiple loose femora would fully dislodge). 5, Epigyne, dorsal view. 6, Epigyne, ventral view.

Description of non-type female (CARTROUNNE 8953). Dark brown carapace, except the head area, which is reddish brown, scattered feathery white hairs on the thoracic area and sides. Chelicerae brown, vertical, with a large bicuspid retrolateral tooth, a small prolateral tooth, and a small posterior medial tooth. Labium slightly longer than wide, brown with inner edge white. Endites brown with inner border white and bordered by hairs, almost the same size as the labium. Sternum brown, oval with straight anterior edge. First pair of legs dark brown, second to fourth pair light brown with dark brown rings from distal femur. Abdomen mottled and brown, at least five pairs of white spots on two longitudinal black bands, laterals with oblique white bands, ventrally with dull brown posterior area. Measurements: TL 4.66; carapace = CL 1.93, CW 1.85, CH 1.33. Cly AME 0.08; eyes = LOQ 0,93, AERW 1.55, PERW 1.63, ALE–PME 0.15, PME–PLE 0.35; sternum = SL 0.89, SW 0.55; pedipalp = Fe 0.67, Pa 0.30, Ti 0.33, Ta 0.59; pata I: Fe 1.48, Pa 0.96, Ti 1.11, Me 0.74, Ta 0.52; pata II: Fe 14.50, Pa 0.67, Ti 0.74, Me 0.67, Ta 0.41; pata III: Fe 1.04, Pa 0.67, Ti 0.59, Me 0.67, Ta 0.41; pata IV: Fe 1.33, Pa 0.67, Ti 0.81, Me 0.74, Ta 0.41. AL 2.52. SPINES: pedipalp = Fe d 1–1, Fe I d1–1–1,p2, Pa I p1, Ti I p1–1–1, Me I v2–2, Fe II d1–1,p2, Pa II p1, Ti II v1–1–2dist, Me II v2–2, Fe III d1–1,p2, Pa III r1, Ti III p1,r1,v2dist, Me III p1,r1, whorl6(4v,1p1r2d), Fe IV d1–1, 2pd, Pa IV r1, Ti IV p1–1, r1–1, v2dist, Me IV p1,r1, whorl4(p2,r2).

Remarks. The habitus and epigyne morphology of Mirandia australis ( Figs. 3–6 View Figures 3–6 ) is congruent with that of available illustrations of the genus Gastromicans Mello-Leitaõ, 1917 ( Metzner 2023) , although it is not synonymous with the six (of seven) current species for which females are known: G. albopilosa ( Simon, 1903) , G. hondurensis (G. W. Peckham & E. G. Peckham, 1896) , G. levispina (F. O. Pickard-Cambridge, 1901) , G. noxiosa ( Simon, 1886) , and G. vigens (G. W. Peckham & E. G. Peckham, 1901) . Therefore, we synonymise Mirandia with Gastromicans syn. nov. and regard its type species as valid, newly combined as Gastromicans australis comb. nov.

Since the holotype is fragile, extensive measurements were not made in order to not risk further damage. Fortunately, the discovery of a non-type female from Argentina ( Figs. 7–12 View Figures 7–12 ) by MFN allows us to make a detailed redescription of this species.

Distribution. Argentina (new record) and Brazil ( Fig. 18 View Figure 18 ).

0.2 mm 0.2 mm

(CARTROUNNE 8953). 7, Habitus, dorsal view. 8, Habitus, ventral view. 9, Habitus, frontal view. 10, Chelicera, retrolateral view. 11, Epigyne, dorsal view. 12, Epigyne, ventral view.














Gastromicans australis ( Badcock, 1932 ) comb.

Sherwood, Danniella, Nada, MarÍ ́ a Florencia & Pet, Brogan L. 2023

Mirandia australis

Badcock, H. D. 1932: 47
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF