Australosagola yongsooni, Choi & Chandler & Park, 2025

Choi, Su-Ho, Chandler, Donald S. & Park, Jong-Seok, 2025, Australosagola, a new genus of pselaphine beetles from southern Australia (Coleoptera, Staphylinidae, Pselaphinae, Faronitae) with descriptions of seven new species, ZooKeys 1245, pp. 177-205 : 177-205

publication ID	https://doi.org/10.3897/zookeys.1245.151556
publication LSID	lsid:zoobank.org:pub:C4112641-FC74-4967-AC60-198EF5E7E381
DOI	https://doi.org/10.5281/zenodo.15930473
persistent identifier	https://treatment.plazi.org/id/2DA97A78-5F7F-51C7-A486-698873801667
treatment provided by	ZooKeys by Pensoft
scientific name	Australosagola yongsooni
status	sp. nov.

Treatment

Australosagola yongsooni sp. nov.

Figs 1 K View Figure 1 , 2 I View Figure 2 , 12 View Figure 12 , 14 View Figure 14

Type material.

Holotype. Australia: South Australia: • ♂ (aedeagus dissected; ANIC), “ AUSTRALIA: S. Aust., / 16 km SE Adelaide, / Cleland Conservat. / Pk., Pill Box Track // 500 m, IV- 25-1993 / DSChandler, grass / & Eucalypt litter / cut dry sclerophyl ” Paratypes (n = 6; 2 ♂♂, 4 ♀♀). Australia: South Australia: • 3 ♀♀ (1 ♀ slide-mounted; UNHC), same data as holotype ; • 1 ♂ 1 ♀ (1 ♂ slide-mounted; SAMA), Mt. Lofty summit , 26 VI 1988, soil & litter under Euc. obiqua, R. V. Southcott TX 284 ; 1 ♂ (aedeagus dissected; SAMA), Mt. Lofty Rgs. , in moss, R. J. Burton .

Diagnosis.

Australosagola yongsooni sp. nov. can be distinguished from other Australosagola species by its short elytra. Although the overall body size of A. yongsooni is comparable to that of other congeners, its elytra are distinctly shorter, measuring only 0.44 mm in length, whereas those of other species typically range from 0.57–0.88 mm (Figs 2 I View Figure 2 , 12 J View Figure 12 ).

Male description.

Length. 1.8–2.2 mm. Head. Head broader than long, widest across eyes. Head with frontal sulcus and frontal fovea continuous, frontal sulcus widening posteriorly to form teardrop shape (Fig. 12 C View Figure 12 , white arrow, H). Vertexal foveae well visible ventrally, but indistinct dorsally (Fig. 12 C, H View Figure 12 ). Antennomere 1 longer than wide; 2 subquadrate and longer than wide; 3 subconical, smallest, and as long as wide; 4–8 subquadrate and as long as wide; 9 and 10 subquadrate, wider than long (Fig. 12 A, G View Figure 12 ). Thorax. Prothorax as long as wide (Fig. 12 I View Figure 12 ). Elytra short 0.44 mm, as long as wide (Fig. 12 J View Figure 12 ); two subbasal elytral foveae, three basal elytral foveae (1 being fovea at base of sutural stria), discal elytral foveae with short discal striae, and fovea in sutural striae (Fig. 12 J View Figure 12 ). Hind wings fully developed (Fig. 12 L View Figure 12 ). Metatrochanter with ventral margin convex (Fig. 12 E, K View Figure 12 ). Lateral metaventral foveae enlarged (Fig. 12 K View Figure 12 , black arrow). Abdomen. Only abdominal sternite 5 (VII) medially concave, with pair of short setal rows at apex of median projection (Fig. 12 E, M View Figure 12 ). Abdominal tergite 2 (V) ~ 2 / 3 length of tergite 3 (VI). Genitalia. Length 0.37 mm, aedeagus symmetrical, relatively narrow, apical 1 / 2 comparatively weakly sclerotized (Fig. 12 N, O View Figure 12 ). Projections from midpoint straight, apices slightly divergent in ventral and basoventral views (Fig. 12 N, O View Figure 12 ), longer than parameres (Fig. 12 P View Figure 12 ). V-shaped projection at base of median lobe fused at base in ventral view, straight in lateral view, phallobase short, indistinct, with lateral margins evenly curved in ventral view (Fig. 12 N – P View Figure 12 ).

Female sexual characters.

Antennomere 1 thicker than that of male and longer than wide; 2 subquadrate and longer than wide; 3 subconical, smallest, and as long as wide; 4–6 subquadrate and as long as wide; 7–10 subquadrate and transverse (Fig. 12 B View Figure 12 ). Abdominal sternite 5 (VII) lacking median impression and setal rows (Fig. 12 F View Figure 12 ).

Comment.

Although this species has short elytra, the male has long hind wings, and the relatively narrow aedeagus with the straight basal and medial projections of the median lobe that are both forked apically allow the species to be readily identified.

Etymology.

This species is named a respected mentor of the first author, a plant-microorganism interaction specialist, Dr. Yong-Soon Park.

Distribution.

South Australia (Fig. 14 View Figure 14 , black star).

Habitat.

Specimens of this species were collected by sifting soil, grass, and Eucalyptus litter beneath Eucalyptus trees in dry sclerophyll forests.