Staminodeus bispinosus, Nico M. Franz, 2001

Nico M. Franz, 2001, Description And Phylogeny Of Staminodeus, A New Genus Of Derelomini (Coleoptera: Curculionidae) Associated With Cyclanthaceae, The Coleopterists Bulletin 55 (4), pp. 411-432 : 425

Staminodeus bispinosus , new species

Diagnosis. Staminodeus bispinosus is distinguished from S. forcipis by the fairly short frontal spinule and the slightly sinuate profemur in males. It is problematic to separate the females from S. forcipis , S. dilatatus , and S. vectoris by the slight differences in spermathecal characters. The actual association of males and females of S. bispinosus has to be reconfirmed by field observations.

Male. Length 1.5–1.9 mm, width 0.7–1.0 mm, l/ w 2.0 –2.3. Rostrum 0.4–0.5 mm, r/p 0.8–1.0. Frons with 1 apically directed, arcuate spinule, nearly 1/5 as long as diameter of eye, anteriorly with long, fine, erect setae. Pronotum l/ w 0.8 –0.9, convex. Prosternum longer than mesosternum. Profemur ( Fig. 3d ) slightly sinuate, f/p 1.0–1.2, width similar throughout, ventrally denticulate; protibia ( Fig. 3d ) subrectate, t/f 0.8– 1.1, anteroventral margin with row of 6–10 apically directed, arcuate dentes, apically mucronate, promucron nearly 2/3 as long as protarsal claw; mesotibia apically inermous. Elytron l/ w 1.3 –1.6 (N 15). Median lobe ( Fig. 4d ) l/ w 2.8 –3.1 (N 10), laterobasal sclerites apically denticulate, median sclerite heavily sclerotized, basally projected, deflexed, apically acuminate, glabrate, apically rami basally divided, undulate, basal 3/4 of median lobe denticulate, aedeagal apodemes shorter than median lobe. Female. Length 1.9 mm, width 0.7–1.0 mm, l/ w 1.9 –2.1. Rostrum 0.5–0.6 mm, r/ p 1.0–1.2. Frontal spine nearly 3/5 as long as diameter of eye. Pronotum l/ w 0.8 – 0.9. F/p 1.1–1.3; t/f 0.8–0.9. Elytron l/ w 1.3 –1.5 (N 15). Spermatheca ( Fig. 5d ) deflexed nearly 90, subapically undulate, apex rotundate.

Type Information. Male holotype ‘‘ PANAMA, Chiriqui, Fortuna , (8 44 N, 82 15 W), UV trap, June 27, 1978 / H. Wolda, Collector’ ’ ( CWOB) ; female allotype, same label as male holotype with different date ‘‘ July 17, 1978 ’’ ( CWOB); male paratypes, same labels as male holotype with different dates ‘‘ Apr. 17, 1978 ’’ ( CWOB, 1), ‘‘ Apr. 24, 1978 ’’ ( CWOB, 1); ‘‘ PANAMA, Bocas del Toro, Corriente Grande, Rio Changuinola / 9 17 30 N, 82 32 41 W, H. Wolda , Jan. 20, 1980 ’’ ( CWOB, 1), same labels as previous specimen with different dates ‘‘ Jan. 23, 1980 ’’ ( CWOB, 1), ‘‘ Feb. 9, 1980 ’’ ( CWOB, 1), ‘‘ Feb. 13, 1980 ’’ ( MIUP, 1), ‘‘ Feb. 24, 1980 ’’ ( MIUP, 1), ‘‘ Apr. 8, 1980 ’’ ( MIUP, 1); ‘‘ Panama, Bocas del Toro, Cor. Grande, Rio Changuinola , 9 17 30 N, 82 32 41 W, leg. H. Wolda, II­21–1980 ’’ (MIUP, 1), same label as previous specimen with different date ‘‘ III­26–1980 ’’ (MIUP, 1); female paratypes, same labels as male holotype with different dates ‘‘ Apr. 22, 1978 ’’ (CWOB, 1), ‘‘ May 5, 1978 ’’ (CWOB, 2), ‘‘ May 17, 1978 ’’ (CWOB, 1), ‘‘ June 27, 1978 ’’ (CWOB, 1; MIUP, 1), ‘‘ July 25, 1978 ’’ (MIUP, 3), ‘‘ Aug. 22, 1978 ’’ (MIUP, 1).

Etymology. Named for the frontal spine which is present in both sexesbis signifying ‘‘twice’’ and spinosus signifying ‘‘thorny’’ ( Brown 1956). Distribution. Staminodeus bispinosus has been collected on the Carribean slope of Panama, Provincia Bocas del Toro, Río Changuinola; and on the Pacific slope of Panama, Provincia Chiriquı ´, Fortuna ( Fig. 6 ).

Natural History. Unknown.

Figures

Fig. 3. Staminodeus, male, right profemur and protibia, anterior view, a) S. inermis; b) S. curvitibialis; c) S. denticulatus; d) S. bispinosus; e) S. forcipis; f) S. dilatatus; g) S. vectoris. Scale bar 0.1 mm.

Fig. 4. Staminodeus, male, aedeagus, ventral and lateral view, a) S. inermis; b) S. curvitibialis; c) S. denticulatus; d) S. bispinosus; e) S. forcipis; f) S. dilatatus; g) S. vectoris. Illustrations are interpretative: denticulation and setation are omitted. Scale bar 0.1 mm.

Fig. 5. Staminodeus, female, spermatheca and gland reservoir, a) S. inermis; b) S. curvitibialis; c) S. denticulatus; d) S. bispinosus; e) S. forcipis; f) S. dilatatus; g) S. vectoris. Scale bar 0.05 mm.

Fig. 6. Distribution of Staminodeus in Costa Rica, Panama, and Venezuela, S. bispinosus; S. curvitibialis (distributional record for Colombia, Provincia Nariño, La Planada is omitted); S. denticulatus; S. dilatatus; S. forcipis; S. inermis; S. vectoris.