taxonID	type	description	language	source
E4BEC6DDB6C0521DA652817BA62036E3.taxon	description	Figs 1, 3 Chinese common name: 奇珍羔蚁甲	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
E4BEC6DDB6C0521DA652817BA62036E3.taxon	diagnosis	Diagnosis. Male. Habitus rather stout, with short antennae and legs. Body length approximately 1.1 mm. Eyes small (compared to congeners), broadly separated; antenna with two observable antennomeres; terminal antennomere nearly straight, dorsally exposed part approximately 3.6 × as long as wide. Pronotum with sparse, distinct punctures. Elytra reticulate at center of disc. Legs simple, lacking modifications. Composite tergite (IV – VI) of abdomen laterally with pair of oblique, longitudinal cavities. Sternite 2 (IV) with complete lateral carinae. Aedeagus elongate, dorsoventrally symmetric; apex of median lobe narrowed, curved ventrally; parameres dorsally fused with median lobe, elongate and slender, with rounded, asetose apices. Female. Unknown.	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
E4BEC6DDB6C0521DA652817BA62036E3.taxon	description	Description. Male. Body (Fig. 1 A) stout; length 1.08 – 1.12 mm; colour reddish brown, with paler tarsi and mouthparts. Dorsal vestiture consists of sparse, suberect golden setae. Head capsule (Fig. 1 B) dorsally subcylindrical, significantly longer than wide, length 0.30 mm, width across eyes 0.21 mm; vertex depressed at level of posterior margin of eyes, with coarse surface, lacking foveae (dorsal tentorial pits); frons with sparse, large punctures, evenly elevates to form broad rostrum, which then descends sharply and features vertical, anteriorly divergent keel at middle; clypeus markedly short, small, with sparse setae on its anterior margin. Venter with reticulate surface; gular region broadly, moderately impressed, with single small pit containing tiny foveae (posterior tentorial pits); lacking median longitudinal carina. Compound eyes moderately prominent, each having approximately 32 ommatidia. Head capsule slightly expanded posteriorly, not separated from ‘ neck’ region, surface of cervical part with reticulate microsculpture especially distinct at middle. Antenna (Fig. 1 C) 0.32 mm long, with two observable antennomeres and lacking modifications; antennomere 1 short, transverse, dorsally invisible as completely hidden beneath rostrum; terminal antennomere elongate, with dorsally visible part approximately 3.6 × as long as wide, broadened slightly toward rounded apex; few indistinct sutures at basal portion suggest fusion of apical antennomeres. Pronotum (Fig. 1 B) pentagonal, wider than long, length 0.23 – 0.24 mm, width 0.31 – 0.32 mm, widest at its posterior angles; anterior margin broadly, slightly impressed medially; lateral margins nearly straight, divergent posteriorly; posterior margin convex, obtusely angled at middle; disc weakly impressed mediobasally, with sparse, large punctures, lacking foveae. Prosternum with basisternal (precoxal) portion much longer than procoxal rests; with tiny, well-separated procoxal foveae. Hypomera largely fused with prosternum, lacking hypomeral grooves; hypomeral carinae weakly prominent, clinging to lateral edges of coxal cavities. Elytra together broadly transverse, sub-rectangular, length 0.36 – 0.37 mm, width 0.54 mm; anterior margins distinctly inclined medially; lacking basal foveae, carinae, or sulci, but with well-marked reticulate sculpture at center; humeri broadly rounded, flat, with thin marginal carinae extending from humeral bases to beyond half elytra length; posterolateral margins broadly rounded; with nearly straight posterior margins. Metathoracic wings fully developed. Mesoventrite short, laterally fully demarcated from metaventrite by oblique carinae; median mesoventral foveae narrowly separated, located anterior to median keel; with pair of small lateral mesoventral foveae and short lateral longitudinal carinae. Metaventrite roundly, broadly convex at middle, descending laterally, with distinct reticulate sculpture on lateral portions; small lateral metaventral foveae present; metaventral intercoxal process broadly separating coxae, weakly convex medially. Legs short, lacking modifications; tibiae broadened in their apical halves. Abdomen sub-semicircular, distinctly narrower than elytra, length 0.22 – 0.24 mm, width 0.45 mm, widest at basolateral margins of composite tergite. Composite tergite (IV – VI) convex medially, with oblique lateral carinae extending from tergal base posterolaterally to approximately 2 / 5 of tergal length, forming lateral edges of longitudinal cavities; each cavity with basolateral fovea at its anterior end and lateral fovea at its posterior end; tergite 2 (VII) short, greatly transverse, with pair of small basolateral foveae; 3 (VIII) subtrapezoidal, transverse, with small basolateral foveae and broadly concave posterior margin. Sternite 2 (IV) broadly, moderately convex medially; with thin, posteriorly divergent lateral carinae that extend parallel to posterior margin of sternite approximately posterior to basal 1 / 5; 3 – 5 (V – VII) of subequal length at middle; each short, transverse, lacking foveae; 6 (VIII) transverse, lacking foveae; presumed sternite 7 (IX), or genital plate (Fig. 1 D), of membranous, sub-annular structure that encircles apical part of aedeagus. Aedeagus (Fig. 1 E, F) 0.13 mm long, elongate, dorsoventrally symmetric; median lobe with extensive, basally rounded capsule, transversely oval foramen, and large oval diaphragm; apical 1 / 4 narrowed into ventrally bent apex; endophallus armature composed of many membranous, spine-like structures mostly in central part; parameres dorsally fused with ventral wall of median lobe; each elongate, slender, moderately expanded at its rounded, asetose apex. Female. Unknown.	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
E4BEC6DDB6C0521DA652817BA62036E3.taxon	distribution	Distribution. Southwest China: Yunnan (Fig. 3).	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
E4BEC6DDB6C0521DA652817BA62036E3.taxon	etymology	Etymology. The epithet is a Latin adjective that means “ sweetest, most charming. ” This name refers to the beetle’s charming and delicate appearance.	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
46B6BE9CD5015219B22C0B8CE55E336B.taxon	description	Figs 2, 3	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
46B6BE9CD5015219B22C0B8CE55E336B.taxon	distribution	Distribution. Singapore; Malaysia (Pahang) (Fig. 3).	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
9CDA83308ECD55DD85CE9F6A8AEE160D.taxon	type_taxon	Type species. Disarthricerus integer Raffray; by original designation.	en	Yin, Zi-Wei, Nomura, Shûhei, Hlaváč, Peter, Lü, Liang (2025): Disarthricerus dulcissimus sp. nov. (Coleoptera, Staphylinidae, Pselaphinae): a precious dwarf from the north. Deutsche Entomologische Zeitschrift 72 (2): 517-524, DOI: 10.3897/dez.72.170957
