Staminodeus inermis, 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 : 419-420

Staminodeus inermis , new species

Diagnosis. Staminodeus inermis is distinguished from the other species of Staminodeus by the small size, the light reddish­brown color (but see section on variation in generic description); the short distance between the eyes, the ventrally inermous prothoracic leg in males; and the fairly short frontal spine in females.

Male. Very small, length 1.2–1.3 mm, width 0.6–0.7 mm, l/ w 1.9 –2.0, light reddishbrown. Rostrum 0.3 mm, r/p 0.9–1.0. Eyes separated by distance similar to breadth of antennal club. Frons glabrate, slightly protruded. Pronotum l/ w 0.8, slightly convex. Prosternum similar in length to mesosternum, slightly convex. Profemur ( Fig. 3a ) slightly sinuate, f/p 1.0–1.3, greatest width near apical 2/5, ventrally inermous; protibia ( Fig. 3a ) subrectate, t/f 0.8–0.9, anteroventral margin inermous, apically mucronate, promucron nearly 2/3 as long as protarsal claw; mesotibia apically mucronate, mesomucron nearly 1/4 as long as mesotarsal claw. Elytron l/ w 1.3 –1.5 (N 15). Wing/body 1.3–1.5, wing l/ w 2.9 –3.7. Median lobe ( Fig. 4a ) l/ w 2.6 –3.0 (N 5), laterobasal sclerites apically broadened, denticulate, median sclerite plicate, apical rami basally diverging, apically fused into triangular projection, basal 1/3 of median lobe denticulate, aedeagal apodemes shorter than median lobe.

Female. Length 1.1–1.4 mm, width 0.6–0.7 mm, l/ w 1.9 –2.0. Rostrum 0.3–0.4 mm, r/p 1.0–1.2. Eyes separated by distance slightly greater than breadth of antennal club. Frontal spine nearly 1/3 as long as diameter of eye. Pronotum l/ w 0.7 –0.8. F/p 0.9– 1.3; t/f 0.7–1.0, protibia apically mucronate, promucron nearly 1/4 as long as protarsal claw. Elytron l/ w 1.3 –1.5 (N 15). Wing/body 1.4–1.5, wing l/ w 3.1 –3.6 (N

5). Spermatheca ( Fig. 5a ) deflexed nearly 135, apex acute.

Type Information. Male holotype ‘‘ PANAMA, Bocas del Toro, Corriente Grande, Rio Changuinola / 9 17 30 N, 82 32 41 W, H. Wolda, Feb. 28, 1980 ’’ ( CWOB) ; female allotype, same label as male holotype with different date ‘‘ Feb. 12, 1980 ’’ ( CWOB) ; male paratypes, same labels as male holotype with different dates ‘‘ Jan. 22, 1980 ’’ ( AMNH, 1), ‘‘ Jan. 23, 1980 ’’ ( AMNH, 2), ‘‘ Jan. 25, 1980 ’’ ( AMNH,1), ‘‘ Jan. 26, 1980 ’’ ( AMNH, 1; BMNH, 1), ‘‘ Jan. 29, 1980 ’’ ( BMNH, 1), ‘‘ Feb. 6, 1980 ’’ ( BMNH, 1), ‘‘ Feb. 8, 1980 ’’ ( BMNH, 1), ‘‘ Feb. 10, 1980 ’’ ( BMNH, 1), ‘‘ Feb. 11, 1980 ’’ ( CMNC, 1), ‘‘ Feb. 12, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 3, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 10, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 12, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 16, 1980 ’’ ( CWOB, 1); ‘‘ Panama, Bocas del Toro, Cor. Grande, Rio Changuinola , 9 17 30 N, 82 32 41 W, leg. H. Wolda, II­06 –1980 ’’ ( CWOB, 2), same labels as previous specimens with different dates ‘‘ II­14 –1980 ’’ ( CWOB, 1), ‘‘ II­15 –1980 ’’ ( CWOB, 1; INBC, 1), ‘‘ II­17 – 1980 ’’ ( INBC, 1), ‘‘ II­26 –1980 ’’ ( INBC, 2), ‘‘ III­25 –1980 ’’ ( INBC, 1), ‘‘ III­ 27 – 1980 ’’ ( MIUP, 2), ‘‘ IV­04 –1980 ’’ ( MIUP, 1), ‘‘ IV­19 –1980 ’’ ( MIUP, 1), ‘‘ IV­24 –1980 ’’ ( MIUP, 1; MUCR, 3), ‘‘ IV­25 –1980 ’’ ( MUCR, 1), ‘‘ V­05 – 1980 ’’ ( MUCR, 1); female paratypes, same labels as male holotype with different dates ‘‘ Jan. 30, 1980 ’’ ( AMNH, 1), ‘‘ Feb. 2, 1980 ’’ ( AMNH, 1), ‘‘ Feb. 3, 1980 ’’ ( AMNH, 1), ‘‘ Feb. 4, 1980 ’’ ( AMNH, 1), ‘‘ Feb. 7, 1980 ’’ ( AMNH, 1), ‘‘ Feb. 12, 1980 ’’ ( BMNH, 2), ‘‘ Feb. 14, 1980 ’’ ( BMNH, 1), ‘‘ Feb. 25, 1980 ’’ ( BMNH, 1), ‘‘ March 7, 1980 ’’ ( BMNH, 1), ‘‘ Apr. 15, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 27, 1980 ’’ ( CMNC, 1), ‘‘ Apr. 28, 1980 ’’ ( CMNC, 1); ‘‘ Panama, Bocas del Toro, Cor. Grande, Rio Changuinola , 9 17 30 N, 82 32 41 W, leg. H. Wolda, II­04 – 1980 ’’ (CMNC, 1), same labels as previous specimen with different dates ‘‘ II­06 – 1980 ’’ (CMNC, 1), ‘‘ II­07 – 1980 ’’ (CWOB, 2), ‘‘ II­14 – 1980 ’’ (CWOB, 1), ‘‘ II­15 – 1980 ’’ (CWOB, 2; INBC, 1), ‘‘ II­21 – 1980 ’’ (INBC, 3), ‘‘ II­26 – 1980 ’’ (INBC, 1), ‘‘ III­27 – 1980 ’’ (MIUP, 1), ‘‘ III­29 – 1980 ’’ (MIUP, 2), ‘‘ IV­02 – 1980 ’’ (MIUP, 1), ‘‘ IV­20 – 1980 ’’ (MIUP, 1; MUCR, 2), ‘‘ IV­24 – 1980 ’’ (MUCR, 2), ‘‘ IV­25 – 1980 ’’ (MUCR, 1).

Etymology. Named for the male plesiomorphy of lacking ventral denticulation on the prothoracic leg— inermis signifying ‘‘unarmed’’ ( Nichols 1989).

Distribution. Staminodeus inermis has been collected on the Carribean slope of Panama, Provincia Bocas del Toro, Río Changuinola ( 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.