Rudolfina remiforma, 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 : 40-43

Rudolfina remiforma sp. nov.

urn:lsid:zoobank.org:act:01D37BA9-BF63-4930-9EF1-E1BB6D87C73F

Figs 19–20 , 21C

Etymology

The species name is from the Latin for ‘oar-shaped’ and refers to the posterior lobe of the surstylus.

Material examined

Holotype

MEXICO • ♂; Chiapas, 21 mi. N of Bochil ; 5500 ft a.s.l.; 18–24 Aug. 1971; A. Newton leg.; pine, oak, Liquidambar , human dung; FMNH debu01086286.

Paratypes

MEXICO • 2 ♀♀; same collection data as for holotype; DEBU • 1 ♀; same collection data as for holotype; FMNH .

Description

BODY. Length: 1.4–1.8 mm. Eye height 2.0 × genal height. Head with 4 interfrontal setae and row of 7 small setulae along inner margin of orbital plate. Gena with 1 strong seta and 8 smaller setulae. Acrostichal setulae in 4–6 rows. Costagial seta extending to humeral break; second costal sector shorter than third (20:65); length of M 1 between crossveins dm-cu and r-m 1.4× dm-cu; CuA 1 stub vein ~2.5– 3.0× M 1 stub vein. Male mid femur with 6 weak setae in ventrobasal cluster. Male mid tibia with ventral comb of 4–5 robust setae on apical ⅓.

MALE ABDOMEN ( Fig. 19 ). Posterior margin of sternite 5 with small tooth on each side of medial emargination; emargination ~⅓ × width of sternite 5. Transverse part of sternite 6 weakly arcuate. Epandrium regular, not swollen, with pair of long setae ventrolaterally and another 2–3 smaller pairs dorsolateral to longer pair; subanal plate narrow, incomplete, with narrow medial space. Surstylus with small anterior lobe and elongate posterior lobe; anterior lobe with 4–5 elongate setae apically; posterior lobe paddle-like and drawn out into rounded tip, with posterior margin weakly expanded near mid-length, anterior margin greatly expanded just before midlength, and 1 large seta near base. Cercus small and conical, projecting posteriorly; apical seta present. Postgonite simple, apex narrowly rounded. Dorsal sclerite of distiphallus without distinct swellings and not extending distally beyond acrophallus ( Fig. 19 D–F).

FEMALE ABDOMEN ( Fig. 20 ). Tergite 7 with posterior margin entire. Medial part of tergite 8 poorly sclerotized or fused with epiproct. Epiproct tulip-shaped, with length of anterior narrowed portion equal or subequal to that of posterior portion. Cercus small, as long as or only slightly longer than flattened apical seta; fused anterolaterally to epiproct. Sternite 7 with posterior margin broadly rounded. Spermathecae lenticular, inner surface with conical projection connecting with duct; paired spermathecae each with duct ~2.0 × length of spermatheca before common duct; single spermathecal duct similar in length.

Remarks

This species is closely related to R. exuberata sp. nov. and R. pauca sp. nov. and shares the modified epiproct found in those species.

Figures

Fig. 19. Rudolfina remiforma sp. nov., male terminalia (debu01086286). A. Epandrium, surstylus and cercus, caudal view. B. Same as preceding, lateral view. C. Sternite 5, ventral view. D. Phallus and postgonites, dorsal view. E. Phallus, postgonites and phallapodeme, dorsolateral view. F. Same as preceding, lateral view. Scale bars: A–B = 0.25 mm; C = 0.10 mm; D–F = 0.08 mm.

Fig. 20. Rudolfina remiforma sp. nov., female terminalia (debu01086288). A. Terminal abdominal segments, dorsal view. B. Same as preceding, lateral view. C. Same as preceding, ventral view. D. Spermathecae. Scale bars: A–C = 0.15 mm; D = 0.05 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.