Stethobaroides elcoranus Prena, 2025

Prena, Jens, 2025, Neotropical orchid-weevils of the genus Stethobaroides Champion (Coleoptera, Curculionidae, Baridinae), Zootaxa 5723 (2), pp. 227-244 : 231-232

Stethobaroides elcoranus Prena , new species

( Figs. 4A , 6A , 8 )

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Diagnosis. Stethobaroides elcoranus occupies an intermediate position between the somewhat larger, ventrally pilose S. piliventris and S. villus from the same general area and the smaller species from the Caribbean side of Mexico and further south. The South American S. scutellatus , with nearly identical male genitalia ( Figs. 4A , 5A–D ), is slightly stouter. The Costa Rican S. lauro has the penis abruptly bent in lateral view and a longer orifice ( Fig. 4F ).

Description. Total length 3.4–3.8 mm, habitus as Fig. 8 , more elongate than smaller species; integument mostly black, antenna and distal tarsite ruddy, dorsally faintly punctate and glabrous, ventrally with inconspicuous appressed setae, setae more erect and condensed along prosternal channel, on distal ventrites and underneath femora; penis slightly narrowed from near base to apex in dorsal view, apex round, rather evenly curved in lateral view ( Fig. 4A ); ventrite 5 of female with apical margin gently bisinuate ( Fig. 6A ).

Etymology. The specific epithet is a Latinised adjective derived from the name of the type locality.

Life history. Unknown.

Distribution. The species is known only from the series collected at Adolph Lüdecke’s coffee plantation “El Cora” in the former Territorio de Tepic, today a village in the municipality of San Blas, Nayarit, México.

Material examined. Holotype male, México, dissected, labelled “El Cora / Tepic / Ad. Lüdecke ” ( MfNB) . Paratypes 3: same data as holotype, 2 males ( JPPC, MfNB), 1 female ( MfNB) .

Figures

FIGURE 4. Stethobaroides, male genitalia, dorsal and lateral aspects. A, S. elcoranus; B, S. villus; C, S. badicrus; D, S. nudiventris (from Toxpam); E, S. permixtus (from La Selva); F, S. lauro. Scale bar 0.5 mm.

FIGURE 5. Stethobaroides scutellatus, male genitalia, dorsal and lateral aspects. A, Nova Teutônia, Santa Catarina, Brazil; B, Piracicaba, São Paulo, Brazil; C, Belém, Pará, Brazil; D, Cayenne, French Guiana. Scale bar 0.5 mm.

FIGURE 6. Stethobaroides, female distal ventrites. A, S. elcoranus; B, S. badicrus; C, S. nudiventris; D, S. scutellatus; E, S. permixtus; F, S. lauro.

FIGURE 8. Stethobaroides elcoranus from Finca El Cora, Nayarit, México. A–C, male, L=3.8 mm; D, female, L=3.4 mm.