Rudolfina pauca, 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 : 35-38

publication ID 10.5852/ejt.2020.593

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Rudolfina pauca

sp. nov.

Rudolfina pauca View in CoL sp. nov.

Figs 16–17 View Fig View Fig , 21C View Fig


The species name is the Latin for ‘few’. Compared to the closely related R. exuberata sp. nov., which occurs throughout the Neotropical region and has been collected at over a hundred different sites, R. pauca sp. nov. has been infrequently collected and remains known from only five sites in Mexico and Guatemala.

Material examined


MEXICO • ♂; México, 1 mi. NE of Tenancingo ; 7100 ft a.s.l.; 31 Aug.–6 Sep. 1971; A. Newton leg.; oak-pine-madrono, human dung; FMNH debu01086244.


GUATEMALA – San Marcos • 1 ♀; San Antonio Sacatepéquez; 14°58′ N, 91°44′ W; 8000 ft a.s.l.; 29 Sep. 1986; M.J. Sharkey leg.; DEBU GoogleMaps .

MEXICO – Hidalgo • 1 ♂, 1 ♀; 4 mi. W of Tulancingo ; 7600 ft a.s.l.; 1–6 Jul. 1971; A. Newton leg.; human dung; DEBU . – México • 6 ♂♂, 10 ♂♂; same collection data as for holotype; FMNH 8 ♂♂, 10 ♂♂; same collection data as for holotype; DEBU 2 ♀♀; 3 mi. SW of Tenancingo , at km 52¼; 7100 ft a.s.l.; 31 Aug.–6 Sep. 1971; A. Newton leg.; oak-juniper, human dung; DEBU 2 ♂♂, 1 ♀; same collection data as for preceding; UNAM . – Morelos • 1 ♀; 8 mi. S of Tres Cumbres ; 7400 ft a.s.l.; 29 Aug.–4 Sep. 1971; A. Newton leg.; oak/pine forest, dung; DEBU .


BODY. Length: 1.4–1.9 mm. Eye height 1.3 × genal height. Head with 4 interfrontal setae and row of 8–10 small setulae on inner margin of orbital plate. Gena with 1 strong seta and 8 smaller setulae. Acrostichal setulae in 6–8 rows. Costagial seta extending to humeral break; second costal sector shorter than third (20:35); length of M 1 between crossveins dm-cu and r-m 1.2 × dm-cu; CuA 1 stub vein ~2.0 × M 1 stub vein. Male mid femur with 4–5 weak setae in ventrobasal cluster. Male mid tibia with ventral comb of 11–13 robust setae on apical ½.

MALE ABDOMEN ( Fig. 16 View Fig ). Sternites 3–4 evenly haired. Posterior margin of sternite 5 with lobes elongate, projecting posteriorly; emargination extending anteriorly ~¼ length of sternite, ~¼ width of sternite at posterior margin. Transverse part of sternite 6 weakly arcuate. Epandrium with 2 long ventrolateral setae and scattered setulae; subanal plate narrowly continuous below anal opening. Surstylus (in lateral view) trilobed, with anterior lobe rounded and bare, middle lobe small, rounded and with 4–6 distal setae apically, and posterior lobe posteriorly projecting and rounded, with 1 large, flattened seta and 2–3 regular setae apically. Cercus small and conical, projecting posterolaterally, with 2 apical setae. Postgonite slightly capitate or oar-shaped, with apex ventrally emarginate; 3–4 setulae present along dorsal surface. Dorsal sclerite of distiphallus ( Fig. 16 View Fig D–F) without swellings and not extending beyond apex of acrophallus.

FEMALE ABDOMEN ( Fig. 17 View Fig ). Posterior margin of tergite 7 medially emarginate. Medial part of tergite 8 elongate, rectangular (length ~3.0× width) and poorly sclerotized; overlapping basal projection of epiproct. Epiproct tulip-shaped, with elongate narrow anterior extension. Cercus reduced, shorter than apical flattened seta; fused anterolaterally to epiproct. Spermathecae acorn-shaped, with a small, smooth distal bulb, a wrinkled medial section and a smooth basal section; paired spermathecae with stems as long as spermatheca; common duct of pair short, ~1/6 length of stems.


See comments under R. exuberata sp. nov.


Field Museum of Natural History


Ontario Insect Collection, University of Guelph


Universidad Nacional Autonoma de Mexico













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