A revision of the genus Rudolfina Roháček (Sphaeroceridae: Limosininae)
Paiero, Steven Mark
Marshall, Stephen A.
European Journal of Taxonomy
2020
2020-01-16
593
1
48
Paiero & Marshall, 2020
Paiero & Marshall
2020
[602,888,1573,1600]
Insecta
Sphaeroceridae
Rudolfina
Animalia
Diptera
29
30
Arthropoda
species
megepandria
sp. nov.
Figs 4, 13, 21B
Etymology The specific name, which has been a manuscript name since Marshall (1982), refers to the unusually large epandrium.
Material examined Holotype MEXICO • ♂; Jalisco, 18 mi.W of Atenquique; 9300 fta.s.l.; A. Newtonleg.; fir forest, dung; FMNHdebu01086084. Fig. 13. Rudolfina megepandria sp. nov., male terminalia (debu01086085). A. Epandrium, surstylus and cercus, lateral view. B. Same as preceding, caudal view. C. Sternites 4–7, ventral view. D. Phallus and postgonite, dorsal view. E. Phallus, postgonite and phallapodeme, dorsolateral view. F. Same as preceding, lateral view. Scale bars: A–B = 0.20 mm; C = 0.05 mm; D–F = 0.05 mm. Paratypes MEXICO– Jalisco• 1 ♂, 1 ♀; same collection data as for holotype; DEBU. – Oaxaca• 1 ♀; Yuvila Rd; 9400 fta.s.l.; 9–19 Aug. 1973; A. Newtonleg.; mesic oak, carrion; FMNH.
Description BODY. Length: 1.9–2.2 mm. Eye height 2.5 × genal height. Head with 3 interfrontal setae and row of 4–5 small setulae 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 subcostal break. Second costal sector 0.75– 0.8× third costal sector. Length of M 1between crossveins dm-cu and r-m– 3.0× dm-cu; CuA 1stub vein ~10.0 × M 1stub vein (M 1stub vein extremely reduced). Male mid femur with 14–15 strong setae in ventrobasal cluster. Male mid tibia with ventral comb of 4–5 robust, short setae on apical ½. Mid tibia without midventral seta (both sexes). MALE ABDOMEN ( Fig. 13). Sternite 5 posterior margin with 2 small nipple-like teeth on each side of small emargination; emargination ~1/15 width and ~1/9 length of sternite 5. Transverse part of sternite 6 arcuate. Epandrium swollen, broader than preceding abdominal segments; subanal plate broad, complete. Surstylus with posterior lobe elongate, length ~4.0× basal width, with a hirsute medial lateral lobe; apex truncate. Cercus elongate-conical, projecting posteriorly. Postgonite elongate, narrowly rounded distally and narrow basally. Dorsal sclerite of distiphallus ( Fig. 13D–F) without dorsal swellings and not extending beyond apex of acrophallus. FEMALE ABDOMEN ( Fig. 4). Tergite 7 with posterior margin entire. Medial part of tergite 8 elongate, length ~2.0–3.0 × width, with posterior margin emarginate. Epiproct broadly rounded anteriorly. Cercus ~0.75× length of epiproct; fused anterolaterally to epiproct. Sternite 7 with posterior margin broadly rounded. Spermathecae cup-shaped; paired spermathecae with stems ~1.5× width of spermatheca.
Remarks Rudolfina megepandria sp. nov.is diagnosed by its swollen male epandrium and distinctively shaped sternite 5. It is most closely related to R. bucki sp. nov., which has a less pronounced epandrium and differs in details of the surstylus and cercus.
2564277645
FMNH
A. Newton
Mexico
2835
Atenquique
29
30
1
1
Jalisco
holotype
2564277647
[189,1069,302,329]
DEBU
A. Newton
Mexico
2835
Atenquique
31
32
2
1
1
Jalisco
paratype
2564277671
1973-08-09
1973-08-19
1973-08-09
FMNH
A. Newton
Mexico
2865
Yuvila Rd
31
32
1
1
Oaxaca
paratype