Published November 25, 2025 | Version v1
Taxonomic treatment Open

Micranops angkorensis Frisch, 2025, sp. nov.

Authors/Creators

Description

Micranops angkorensis, sp. nov.

(Figs 41–43, 155)

Type specimens: Holotype ♂, Cambodia, Siem Reap, 22.V.2003, leg. Constant & Smets (ISNB). Paratypes (5 specimens): 3 ♀, same data as holotype (ISNB); 1 ♀, Cambodia: Siem Reap, road to Angkor, 22.V.2003 (ISNB); 1 ♂, Cambodia, Angkor: Preah-Kahn-Temple, 31.V.2003, leg. Constant & Smets (MFNB).

Description: Macrophthalmous species with palisade fringe of abdominal tergite VII; examined specimens macropterous with elytral sutural length about as long as pronotum and functionary metathoracic wings. Body color medium brown to dark brown; appendages light brown. Body surface subnitid with very fine, dense, setose punctation. Head about 1.1 times longer than wide with moderately convex temples and straight posterior margin. Eyes 0.58–0.65 times as long as temples. Nuchal groove 0.19–0.22 times as wide as greatest head width. Trichobothrial cavity guttiform, with tapered anterior end connected to dorsoposterior margin of eye. Antenna from slightly elongate antennomeres 2 and 3 or 2–4 gradually wider toward moderately transverse penultimate antennomeres; antennomere 10 about 0.8–0.9 times, antennomere 11 about 1.4–1.5 times as long as wide. Total body length 2.3–2.6 mm; forebody length 1.2–1.4 mm.

Male: Protarsomeres 1–4 dilated, approximately twice as wide as long.

Abdominal sternite VII without diagnostic characters.

Abdominal sternite VIII with subbasal ridge straight and posterior margin triangularly incised to about 0.2 of sternite length; lateral setae long, up to about 0.3 times as long as sternite length (Fig. 155).

Aedeagus with lobe-bearing apical portion occupying about 0.2 of aedeagal length (Fig. 41), in dorsal view long-oval, about three times as long as wide (Fig. 43); phallobase strongly extended beyond base of ventral process (Fig. 41), there concave laterally (Fig. 43). Apical lobes each ventrally extended into large, membranous, subtriangular lobe (Fig. 41), in dorsal view subtriangularly narrowed distad (Fig. 43). Dorsal lobe short, occupying about 0.15 of aedeagal length, in lateral view straight dorsally with ventrad curved apex (Fig. 41), in dorsal view with narrow, membranous, unevenly rounded end (Fig. 43). Ventral lobe absent. Ventromedial endophallic lobe strongly projecting between ventral extensions of apical lobes, membranous with strongly sclerotized distal margin extended in proximal and medial, distad pointing tooth (Fig. 41). Endophallic sclerites as in Figs 41, 43. Ventral process reaching ventral extensions of apical lobes, in lateral view strong with moderately ventrad curved, subacute apex (Fig. 41), in ventral view inverted ovoid, strongly widened from narrow base only about 0.3 times as wide as aedeagus at same level to widest point as broad as apical portion of aedeagus (Fig. 42). Dorsomidlongitudinal split including dorsodistal opening occupying about 0.6 of length of phallobase (Figs 41, 43); latter therefore over same length collapsed in dry specimens (Fig. 41). Postforamen moderately projecting distoventrad (Fig. 41). Circoforamen about three times as long as median foramen (Fig. 42). Length of aedeagus 0.33 mm.

Female: Protarsomeres 1–4 not dilated, slightly wider than long.

Distribution: Micranops angkorensis is known only from northwestern Cambodia.

Bionomics: Micranops angkorensis is able to fly. The type specimens were collected with light traps.

Etymology: The epithet angkorensis [Latinized adjective (“from Angkor”), derived from the locality name Angkor with the Latin suffix - ensis that describes the geographical origin] is chosen, because this new species was discovered in the Cambodian region of Angkor, famous for the Angkor Archaeological Park, where one of the paratypes was collected.

Notes

Published as part of Frisch, Johannes, 2025, Micranops Cameron, 1913 in the Old World. New species, redescriptions, and new records (Coleoptera: Staphylinidae: Paederinae), pp. 500-562 in Megataxa 17 (2) on page 520, DOI: 10.11646/megataxa.17.2.5, http://zenodo.org/record/18485817

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Linked records

Additional details

Biodiversity

Collection code
ISNB , MFNB
Scientific name authorship
Frisch
Kingdom
Animalia
Phylum
Arthropoda
Order
Coleoptera
Family
Staphylinidae
Genus
Micranops
Species
angkorensis
Taxon rank
species
Taxonomic status
sp. nov.
Type status
holotype , paratype
Taxonomic concept label
Micranops angkorensis Frisch, 2025