Rudolfina pilosa, Paiero & Marshall, 2020

Paiero, Steven Mark & Marshall, Stephen A., 2020, A revision of the genus Rudolfina Roháček (Sphaeroceridae: Limosininae), European Journal of Taxonomy 593, pp. 1-48: 38-40

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scientific name

Rudolfina pilosa

sp. nov.

Rudolfina pilosa   sp. nov.

Figs 18 View Fig , 21C View Fig


The species epithet is from the Latin for ‘hairy’, referring to the hirsute sternites 4 and 5 of the male.

Material examined


MEXICO • ♂; Oaxaca, 2.0 mi. W of Jct. Mex. 175- Yuvila Rd ; 9500 ft a.s.l.; 8–19 Aug. 1973; A. Newton leg.; oak-pine, dung; FMNH debu01086240.  


MEXICO – Oaxaca • 1 ♂; 6.6 mi. N of Ixtlan de Juarez ; 8300 ft a.s.l.; 10–18 Aug. 1973; A. Newton leg.; oak woodland, human dung; DEBU   1 ♂; 4.1 mi. W of Jct. Mex. 175- Yuvila Rd ; 9300 ft a.s.l.; 8–19 Aug. 1973; A. Newton leg.; oak-fir-pine forest; UNAM   1 ♂; same collection data as for preceding; oak-fir-pine forest; FMNH   .


BODY. Length: 1.5–1.8 mm. Eye height 2.5 × genal height. Head with 3 interfrontal setae and 5–6 small setae along inner margin of orbital plate. Gena with 2 strong setae and 7–9 smaller setulae. Acrostichal setulae in 4–6 rows. Costagial seta extending slightly beyond humeral break; second costal sector equal to third sector; length of M 1 between crossveins dm-cu and r-m 2.0× dm-cu; CuA 1 stub vein ~5.0 × M 1 stub vein. Male mid femur with 4–5 small setae in ventrobasal cluster. Male mid tibia with ventral comb of 7–8 robust setae on apical ½, midventral seta absent (female unknown).

MALE ABDOMEN ( Fig. 18 View Fig ). Sternite 3 and 4 with dense cluster of setae posteromedially. Posterior margin of sternite 5 with round teeth on each side of a medial emargination; emargination less than 1/6 width of sternite and extending ~½ length. Transverse part of sternite 6 weakly arcuate. Epandrium with one large pair of setae ventrolaterally, one smaller pair of setae lateral to larger pair, and several setulae scattered over surface; subanal plate broadly continuous below anal opening. Surstylus boot-shaped, posteriorly bent near base, hirsute with 3–5 setae on posterior lobe (heel) and numerous smaller setae on anterior lobe (toe). Cercus fused with epandrium, with distinct seta on ventral margin. Postgonite clavate, with several setulae on dorsal surface. Dorsal sclerite of distiphallus ( Fig. 18 View Fig D–F) without distinct swellings and not extending beyond apex of acrophallus.




This species is most similar to R. newtoni   sp. nov., which also has a setulose male sternite 4 and sternite 5. These species are easily distinguished by the shape of the male surstylus.


Field Museum of Natural History


Ontario Insect Collection, University of Guelph


Universidad Nacional Autonoma de Mexico