The genus Cartodere comprises 47 species worldwide (Rücker, 2021). This group is comprised of two subgenera: AridiusMotschulsky, 1866 and CartodereThomson, 1859. These subgenera consist of 44 species and three species worldwide, respectively. The subgenus Aridius is characterized by antennomeres 3–8 significantly longer than wide, 9–11 clubbed, and temple shorter than eye length. In contrast, the subgenus Cartodere is characterized by antennomeres 3–8 as long as wide, apical two or three segments clubbed, and temple parallel or angled and equal or longer than eye length (Rücker, 2020;2021).

The genus Cartodere has not yet been recorded from the Korean Peninsula. Herein, we record C. (s. str.) constricta (Gyllenhal, 1827) for the first time from the Korean Peninsula. Additionally, we provide redescription, diagnosis character images, a distribution map, and the holotype image of Lathridius apicalis Blackburn, a junior synonym of C. (s. str.) constricta (Gyllenhal).

Materials and Methods

A total of 15 (1 type and 14 non-types) specimens were examined. Specimen images were taken using a Sony ILCE- 7RM3 mirrorless camera with a Mitutoyo M Plan Apo 10X/20X objective lens. Internal organs of aedeagus were removed using 10% KOH for observation. After that, images were created using same equipment. The creating images were stacked using Helicon Focus 8 or Zerene Stacker ver. 1.04. The figure plates were edited using Adobe Photoshop 2024. A distribution map was created using SimpleMappr (Shorthouse, 2010). Morphological terminology follows Rücker, 2020 and Lawrence et al., 2011. The label data used verbatim. Within labels, single slash (/) and double slashes (//) indicate a line break and label break, respectively.

All specimens examined in this study were deposited at the following collections and indicated parenthetically: BMNH British Museum of Natural History, London, UK and NIAS National Institute of Agricultural Sciences, Wanju, South Korea.

Taxonomic Accounts

Family Latridiidae Erichson, 1842 섶벌레과

Subfamily Latridiinae Erichson, 1842 섶벌레아과

Genus CartodereThomson, 1859 (신칭: 호리가슴섶벌레속)

Subgenus AridiusMotschulsky, 1866

AridiusMotschulsky, 1866: 260. type species Latridius nodiferWestwood, 1839.

= AridionomusReitter, 1911: 81. type species: Latridius nodiferWestwood, 1839.

= EnicmoderesReitter, 1911: 81. type species: Lathridius apfelbeckiReitter, 1901.

Subgenus CartodereThomson, 1859 (신칭: 호리가슴섶벌레 아속)

CartodereThomson, 1859: 93. type species Latridius constrictusGyllenhal, 1827.

= ConinomusThomson, 1863: 217. type species: Latridius constrictusGyllenhal, 1827.

= LatridulusWollaston, 1877: 52. type species: Latridulus approximatusWollaston, 1877.

Diagnosis. Body brown to dark brown. Head slightly longer than wide; surface coarsely wrinkled. Eyes and temple distinct. Antennae 11-segmented, distal two or three segments clubbed. Pronotum strongly constricted on middle; often with milky and waxy secretion along lateral margins. Some species apterous.

Sexual dimorphism. This genus has no distinct sexual dimorphism.

Distribution. Cosmopolitan (Rücker, 2020).

Cartodere (s. str.) constricta (Gyllenhal, 1827) (신칭: 호리 가슴섶벌레) (Figs. 1–3)

Material examined. Holotype. Lathridius apicalis [ Ju nior synonym of C. constricta]: 1ex. (BMNH; Fig. 1) “Type / H. T. // Australia. / Blackburn Coll. / B.M.1910–236. // Lathridius / apicalis, Black // LATRIDIIDAE / CARTODERE (S. STR.) / constricta (GYLLENHAL, 1827) / det. W. RÜCKER, 2005 / [illegible handwritten] // NHMUK016402485”. Non-types. 1 ♂13exx. (1♂ genitalia dissected; NIAS), NIAST KOREA / 민원I / Geonjiri Daedeok / Anseong GG / 10. XII. 2003 / Hae Seon Lee.

Diagnosis. Head median depression distinct, parallel, extending from posterior to anterior margin (Fig. 2B). Eyes large, convex, with over 30 facets (Fig. 2B). Temple parallel, as long as eye length (Fig. 2B). Antennomeres 10 and 11 clubbed (Fig. 2D). Pronotum slightly wider than head, as wide as long, dumbbell-shaped; two longitudinal carinae distinct, extending from anterior to posterior margin (Fig. 2C). Metaventrite two large circular pits present below mesocoxal cavities, surrounded by wrinkles; median furrow distinct, extending from posterior margin to posterior 1/3. Aedeagus lateral margins slightly parallel in ventral view, gradually narrowing from middle to apex, slightly bent in lateral view, with sharp apex (Fig. 2E).

Male redescription. Body length 1.59–1.67 mm, flattened and elongated; reddish-brown, appendages brighter (Figs. 1A, 2A). Head subpentagonal-shaped, widest across eyes; surface densely punctate; median depression distinct, parallel, extending from posterior to anterior margin (Fig. 2B). Temples parallel, as long as eye length (Fig. 2B). Eyes large, convex, with over 30 facets (Fig. 2B). Gular surface relatively impunctate, sometimes covered by milky, waxy secretions. Antennomeres 1–2 globular, 3–8 subrectangular, 9 subquadrate, 10–11 clubbed (Fig. 2D). Pronotum slightly wider than head, as wide as long, dumbbell-shaped, widest in anterior margin, narrowest at 1/3 level of base; surface densely punctate and wrinkle; two longitudinal carinae distinct, extending anterior to posterior margin; with lateral depressions; sometimes with milky, waxy secretion along lateral margins (Fig. 2C). Prosternum surface relatively impunctate, sometimes covered by milky, waxy secretion. Elytra distinctly wider than pronotum, oval-shaped, 1.4–1.5 times longer than wide; shoulders rounded; each elytron with eight rows of punctures, each row consist of 29–32 punctures, diameter of punctures 0.012– 0.016 mm in base, punctures of apex smaller than base; elytral intervals 3, 5, and 7 carinate (Fig. 2A). Mesoventrite distinctly shorter than prosternum; surface weakly wrinkled, with small punctures along anterior area. Metaventrite over twice as long as mesoventrite; two large circular pits present below mesocoxal cavities, surrounded by wrinkles; median furrow distinct, extending from posterior margin to posterior 1/3. Legs moderately long, simple. Ventrites surface relatively smooth, with extremely short setae. Ventrite 1 longest; with wrinkles around metacoxal cavities; ventrites 2–5 similar in length; ventrite 5 bearing short setae on posterior margin. Aedeagus lateral margins slightly parallel in ventral view, gradually narrowing from middle to apex, slightly bent in lateral view, with sharp apex (Fig. 2E).

Note. See Rücker (2020: 371) for the additional information of this species.

Distribution. South Korea (Fig. 3); Cosmopolitan (Rücker, 2020).

Habitat. This species is found in fungi of litter, under bark, in mold on haystack, and also in damp basements and human dwellings.