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

Rudolfina bucki sp. nov.

urn:lsid:zoobank.org:act:2405E619-5A06-42BB-A033-00E43C70A5B6

Figs 8 , 21B

Etymology

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

Material examined

Holotype

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.

Paratype

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

Description

Male

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 ). 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 E–G) without distinct swellings.

Female

Unknown.

Remarks

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.

Figures

Fig. 8. Rudolfina bucki sp. nov., male terminalia (debu01086239). A. Epandrium, surstylus and cercus, caudal view. B. Same as preceding, lateral view. C. Sternite 5, ventral view. D. Phallus, dorsal view. E. Phallus, postgonite and phallapodeme, dorsolateral view. F. Same as preceding, lateral view. Scale bars: A–B = 0.10 mm; C = 0.10 mm; F = 0.10 mm.

Fig. 21. Distribution of species of New World Rudolfina Roháček, 1987. A. R. cavernicola Marshall & Fitzgerald, 1997, R. digitata Marshall, 1991 and R. tumida sp. nov. B. R. bucki sp. nov., R. megepandria sp. nov. and R. howdeni sp. nov. C. R. pauca sp. nov., R. pilosa sp. nov., R. newtoni sp. nov. and R. remiforma sp. nov. D. R. exuberata sp. nov.