Rudolfina bucki, 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: 16

publication ID

publication LSID


persistent identifier

taxon LSID

treatment provided by


scientific name

Rudolfina bucki

sp. nov.

Rudolfina bucki   sp. nov.

Figs 8 View Fig , 21B View Fig


The specific name is a patronym for Dr. Matthias Buck, a friend and previous sphaerocerid taxonomist.

Material examined


MEXICO • ♂; Oaxaca, 4.1 mi. W of Jct. Mex. and 175- Yuvila Rd ; 9300 ft a.s.l.; 8–19 Aug. 1973; A. Newton leg.; oak-fir-pine forest; FMNH debu01086238.  


MEXICO • 1 ♂; same collection data as for holotype; DEBU   .



BODY. Length 1.6mm. Eye height 2.5× genal height. Head with 3–4 interfrontal setae and 4–5 small setae on inner margin of orbital plate. Gena with 2 strong setae and 7–8 smaller setulae. Acrostichal setulae in 4–6 rows. Costagial seta extending to midpoint between humeral and subcostal break. Second costal sector 0.7–0.8 × third costal sector; length of M 1 between crossveins dm-cu and r-m 3.5× dm-cu; CuA 1 stub vein ~3.0× M 1 stub vein. Male mid femur with 5–7 strong ventral setae and a circular cluster of 5–10 weaker setae ventrobasally. Male mid tibia with ventral comb of 4–5 robust setae on apical ⅓, without an enlarged midventral seta.

MALE ABDOMEN ( Fig. 8 View Fig ). Sternite 5 with pair of medial triangular lobes on posterior margin, distance between lobes>1.0× basal width of single lobe, lobe length ~1/5 length of remainder of sternite. Transverse part of sternite 6 weakly arcuate. Epandrium strongly convex, with irregular cluster of 6–8 long, inclinate posterolateral setae (appearing fan-like in posterior view); subanal plate broad, complete. Surstylus with anterior lobe reduced to small basal swelling; posterior lobe elongate, clavate, weakly bent anteriorly on apical ⅓; apical half of posterior lobe covered in small setae, with 1 robust elongate seta on posterior margin and 4–5 strong setae on inner surface. Cercus small, conical, with strong preapical seta. Postgonite apically truncate. Dorsal sclerite of distiphallus ( Fig. 8 View Fig E–G) without distinct swellings.




The male abdomen is similar to that of R. megepandria   sp. nov., but males can be separated from that species by the shorter cercus and less pronounced epandrium.


Field Museum of Natural History


Ontario Insect Collection, University of Guelph