Carpelimus ( Trogophloeus ) bacillus Gildenkov, 2025

Carpelimus ( Trogophloeus) bacillus Gildenkov , sp. n.

https://zoobank.org/NomenclaturalActs/ 652CC8C3-431F-4157-A7AD-E39F989DBECF

Figs 1–4 View Figs 1–4

TYPE MATERIAL. Holotype – ♂, Philippines: Luzon “Los Banos Luzon” “Chicago NHMus M. Bernhauer Collection ” ( FMNH) . Paratypes: 1♂, Philippines , Luzon “Luzon, P, I. Montalban” “Chicago NHMus M. Bernhauer Collection ” (cMG) ; 1♀, Philippines , Luzon “Los Banos Luzon” “leg. Boettcher 3. Los; Staudinger” “Cotypus Trogophloeus bacillus Bernhauer ” “ Trogophloeus bacillus Brh. ” “ex. coll. Scheerpeltz ” ( NHMW) .

DESCRIPTION. MALE ( holotype). Length 1.3 mm, slightly flattened. Head, pronotum and abdomen dark brown; elytra brown; legs and antennae yellowish-brown. Integument slightly shining, body with short, light-coloured hairs.

Head quite transverse, with wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 12:19. Neck constriction prominent. Eyes small, slightly convex. Temples well developed, eye diameter in dorsal view slightly less than temple length. Head widest across temples. Head surface with very delicate and uniform shagreen ( Fig. 1 View Figs 1–4 ). Antennae short ( Fig. 1 View Figs 1–4 ), antennal segments 1–2 conical, elongate; 3 – conical, slightly elongate, significantly narrower and shorter than 1st and 2nd antennal segments; 4–6 approximately equal in length and width; 7–10 slightly transverse; antennal segment 11 elongate, cone-shaped. 9–11 segments more massive than others, forming a loose club.

Pronotum widest about 2/3 its length from base, then narrowed. Lateral margins smoothly rounded ( Fig 1 View Figs 1–4 ). Ratio of pronotum length to its maximum width about 17:20. Surface of pronotum delicate and uniform shagreened as that on head. Base and central part of pronotal disc with two pairs of small, flat and symmetrical rounded depressions, barely noticeable ( Fig. 1 View Figs 1–4 ).

Length of elytra related to their combined width approximately as 23:24. Scutellum area with less developed oval depressions ( Fig. 1 View Figs 1–4 ). Elytra covered with delicate, fine and dense punctation. Diameter of punctures approximately equal to diameter of eye facet. Distances between punctures slightly smaller than their diameter, interspaces smooth, slightly shiny.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs. 2, 3 View Figs 1–4 ).

FEMALE. Sexual dimorphism absent, female morphologically similar to male. Spermatheca of characteristic structure ( Fig. 4 View Figs 1–4 ).

DISTRIBUTION. Philippines: Luzon.

ETYMOLOGY. From Latin “bacillus ” – the name is associated with the small size of the new species and, possibly, with the rather cylindrical body shape.

DIAGNOSIS. The new species is the smallest of all known species of the genus from the Philippines and is reliably differs from all known species of Carpelimus by the structure of the aedeagus ( Figs. 2−3 View Figs 1–4 ).