Staminodeus denticulatus, 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 : 424

Staminodeus denticulatus , new species

Diagnosis. Staminodeus denticulatus is distinguished from the other species of Staminodeus in general, and from S. curvitibialis in particular, by the frontal spinule and the high number of small denticuli along the apically inermous protibia in males; as well as the fairly long and abruptly deflexed frontal spine in females.

Male. Length 1.8–2.4 mm, width 0.9–1.2 mm, l/ w 1.9 –2.2. Rostrum 0.4–0.6 mm, r/p 0.7–0.8, laterobasal 1/3 carinulate. Eyes separated by distance slightly greater than breadth of antennal club. Frons with 1 apically directed, arcuate spinule, nearly 1/4 as long as diameter of eye, anteriorly with long, fine, erect setae. Pronotum l/ w 0.8 –0.9, anteriorly distinctly narrowed, distinctly convex. Prosternum distinctly longer than mesosternum, equilateral, distinctly convex. Profemur ( Fig. 3c ) slightly arcuate, f/p 1.0/ 1.3, width similar throughout, ventrally denticulate; protibia ( Fig. 3c ) slightly arcuate, t/ f 1.0, anteroventral margin with row of 12–18 apically directed, arcuate, acute denticuli, apically inermous; mesotibia apically inermous. Elytron l/ w 1.3 –1.5 (N 4). Median lobe ( Fig. 4c ) l/ w 2.3 –2.3 (N 3), apical margin medially projected, laterobasal sclerites weakly sclerotized, short, spinulose, median sclerite heavily sclerotized, short, basally rotundate, impressed, apically spinulose, with 2 elongate, slightly diverging projections, apical rami broad, apically deflexed, with small, elongate, spinulose region between apical rami, aedeagal apodemes slightly longer than median lobe.

Female. Length 1.9–2.4 mm, width 1.0– 1.2 mm, l/ w 1.8 –2.0. Rostrum 0.5–0.7 mm, r/p 0.9–1.0, laterobasal 1/3 carinulate. Frontal spine nearly 2/3–3/4 as long as diameter of eye, basally subrectate, perpendicular to frons, apically abruptly deflexed (not gradually arcuate). Pronotum l/ w 0.8 –0.9, greatest width near anterior 1/3. Prosternum longer than mesosternum. F/p 0.9–1.2; t/f 0.9–1.1. Elytron l/ w 1.2 –1.5 (N

12). Spermatheca ( Fig. 5c ) deflexed nearly 90, apex slightly separated, obtuse.

Type Information. Male holotype ‘‘ Costa Rica, Puntarenas, Las Cruces , 1,100 m, on Carludovica subpalmata, leg. L. Gómez, XII­1994 ’’ ( CMNC) ; female allotype, same label as male holotype ( CMNC) ; male paratypes ‘‘PAN­ AMA, Chiriqui, Fortuna, (8 44 N, 82 15 W), UV trap, Apr. 22, 1978 / H. Wolda, Collector’ ’ ( CWOB, 2), same label as previous specimens with different date ‘‘ Aug. 9, 1977 ’’ ( MIUP, 1); same label as male holoype ( MUCR, 1); ‘‘ Costa Rica , Puntarenas, Las Cruces , 1,000 m, on Evodianthus funifer, leg. L. Gómez, XII­29–1994 ’’ ( MUCR, 1); female paratypes, same label as male holotype ( CMNC, 1); ‘‘ Costa Rica , Puntarenas, Las Cruces , 1,000 m, on Evodianthus funifer, leg. L. Gómez, XII­29–1994 ’’ ( CMNC, 1; MUCR, 3); ‘‘PAN­ AMA , Chiriqui, Fortuna, (8 44 N, 82 15 W), UV trap, Apr. 22, 1978 / H. Wolda, Collector’ ’ ( CWOB, 1), same labels as previous specimen with different dates ‘‘ May 2, 1978 ’’ ( CWOB, 1), ‘‘ July 11, 1978 ’’ ( CWOB, 1), ‘‘ Aug. 2, 1978 ’’ ( MIUP, 2).

Etymology. Named for the denticulate protibia in males— denticulatus signifying ‘‘with small teeth’’ ( Brown 1956).

Distribution. Staminodeus denticulatus has been collected in the Cordillera de Talamanca of Costa Rica, Provincia de Puntarenas, San Vito: 0 8 47 N, 82 57 W; on the Carribean slope of Panama, Provincia Bocas del Toro, Chiriquí Grande; and on the Pacific slope of Panama, Provincia Chiriquı ´, Fortuna ( Fig. 6 ).

Natural History. Staminodeus denticulatus is associated with Carludovica palmata Ruíz & Pavón and Evodianthus funifer (Poit.) Lindman in Costa Rica, and with Asplundia sp. in Panama, Provincia Bocas del Toro, Chiriquí Grande (label information by Windsor & Stockwell, X­13–1996).

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.