Archicolliuris albolineata sp. n.

Figure 1

Type material: Holotype, male: “ Filippine —C Luzon / Norzagaray / Bulacan II.2023 ” (RSc) . Paratypes: 1 ♂: idem (RSc); 1 ♂, 1 ♀: “ Norzagaray Bulacan, Central Luzon / April 2023 ” (RSc; DUBC) ; 1 ♂: “ Norzagaray, Bulacan, III. 2023 ” (RSc) ; 1 ♀: id. IV. 2023 (RSc); 1 ♀: id. V. 2023 (RSc); 2 ♀: “ Benedicto, Don Salvador, Negros occ., XI.2019 ” (Rsc) .

Diagnosis. This new species (Fig. 1) is very similar in habitus and probably related to Archicolliuris tenuis (Andrewes, 1926) (Fig. 2) and its “var.” linea (Andrewes, 1926) (Fig. 3), but is easily distinguished from both by a long yellow stripe in interval 5 of the elytra; by a shorter and broader pronotum with one lateral seta; and by much rounded head with convex temples. While in A. tenuis, the temples are almost straight and the pronotum is more elongate and without lateral seta.

Description. Body length 5.7–6.0 mm. Head and pronotum black, shiny, with a very faintly copper green reflection, labrum dark brown, mandibles reddish-brown, palpi light yellowish-brown, antennomeres I–IV yellowish-brown, rest of antennae dark-brown to blackish-brown; elytra black, shiny, with a very faintly copper green reflection, and with long yellow stripe in interval 5 of elytra; legs uniformly yellow-orange; ventral side black.

Microsculpture. Labrum with transverse meshes; elytra and head (frons and vertex) smooth; prothorax with very superficial transverse meshes.

Head rhomboidal, slightly convex; neck 0.25 times as wide as head, with evident carina along eye in front ¾ of lenght; tempora smooth, laterally slightly convex, almost as long as eye; eyes prominent; anterior and posterior supraorbital setae present (posterior one located fully apart from eye); labrum with six apical setae, anterior margin slightly concave; clypeus smooth, with two long setae; frons with V-shaped gentle impression in middle; clypeal furrow indistinct; frontal impressions deep; antennae reaching shoulders; tooth of mentum triangular, right angle at apice.

Pronotum PL/PW = 1.76; pitcher-shaped, somewhat constricted near base, widest in basal third; about 0.7 times as wide as head; smooth; with one lateral seta on each side; disc with transverse wrinkles; base about 1.6 times as wide as apex; median line very fine, obliterated at base and apex; laterobasal area punctate, with few punctures extended along sides, sometimes almost till midlength.

Elytra moderately long, 1.8 times as long as wide, widest in apical third; smooth; without parahumeral transverse depression; two marginal setae near apex of each elytron; apical truncation moderately sinuate; exterior apical angle of elytra right; striae represented by rows of large punctures, which become faint apically; intervals flat, interval III with four dorsal setiferous pores; one scutellar setiferous pore; umbilical series 7-1-7.

Ventral generally impunctate. Proepisternum with a few coarse punctures at base; mesoepisternum with few large punctures in apical area; metepisternum completely glabrous, long and narrow, about three times as long as wide; apical ventrite in male glabrous, emarginate at mid-margin, with one apical seta on each side; apical ventrite in female pubescent, with two apical setae on each side.

Legs slender; tarsomere IV of each tarsus weakly bilobed; tarsomere V with two ventral rows of four thin setae; femora with two setae (one near base and one in middle).

Male Genitalia: median lobe of aedeagus elongate, subcylindrical (Fig. 4), on the ventral side with a deep notch forming an obtuse angle, which is located in the basal third; with a surface sclerites on apical orifice; apical orifice slightly turned to right in lateral view; apex elongate, downturned; endophallus without sclerites. Left paramere large, ear-shaped; right paramere narrower than left one. Female genitalia: gonocoxite 2 with two thick spines near outer margin of ventral side and one spine dorsally.

Etymology. The specific epithet is from the Latin albus (“white”) and lineata (“with a line”), in reference to the characteristic white stripe along each elytron of the new species,

Distribution. Philippines (Luzon and Negros Islands).

Systematic notes: Currently, we prefer to describe the new species as still belonging to Archicolliuris, in case the genus is split, then it would certainly find its place in Anacolliuris, as it is very close to that type-species.