Trechus cardioderus cardioderus Putzeys, 1870

Kostova, Rumyana & Bekchiev, Rostislav, 2025, New insights into the taxonomy of Trechus Clairville, 1806 (Coleoptera: Carabidae) in the Balkans, with the first description of the male of Trechus bohemorum Pawlowski, 1973, Zootaxa 5661 (4), pp. 538-552 : 544

- Trechus cardioderus cardioderus Putzeys, 1870

Material studied: CROATIA: 1 ♂ labelled as T. pilisiensis Csiki, 1918 ‘ Zagreb, Tuskanac Zelengaj , 21.V.1912 Cro.’ (NMPC); SLOVENIA: 4 ♂♂ labelled as T. pilisiensis ‘Radoha, Carn., Mařan lgt.’ (NMPC); BOSNIA AND HERZEGOVINA: 1 ♂ labelled as T. goleshnicensis Apfelbeck, 1918 ‘Bosnia, Ostrelj’ (NMPC).

Examination of the male genitalia of the above-mentioned specimens in the collection of the NMPC revealed that all of them belong to T. cardioderus sensu stricto. The morphology of the median lobe in these specimens does not match identification labels, as all have a strongly downward-curved apex ( Fig. 7 ), which is characteristic of T. cardioderus s. str. ( Jeannel 1927: 455 Fig. 1077).

Until now, the nominative subspecies of T. cardioderus was known only from Romania and North Macedonia ( Jeannel 1927; Nonveiller 1994; Hristovski & Guéorguiev 2015; Belousov 2017). Thus, the nominative subspecies of T. cardioderus is recorded for the first time in Croatia, Slovenia, Bosnia and Herzegovina ( Fig. 4 ). New labels with revised identifications were pinned beneath the specimens.

Figures

FIGURE 4. Map of the currently known distribution of Treshus cardioderus cardioderus Putz.

FIGURE 7. Median lobe of the male genitalia (lateral and dorsal views) of taxa of the Trechus “subnotatus” group: A–C— Trechus cardioderus cardioderus Putz. (Slovenia, Radoha, NMPC); D—Trechus binotatus Putz. (Italy, Vallombrosa, NMPC); E—Trechus cardioderus irenis Csiki (Bulgaria, Central Stara Planina Mts., according to Kostova & Bekchiev 2023); F— Trechus cardioderus balcanicus Jeann. (Bulgaria, East Stara Planina Mts., according to Kostova & Bekchiev 2023); G–I— Trechus pilisensis pilisensis Csiki (G—Slovakia, M. Bor; H—Czechia, Skryje; I—Austria, Schobrstein, NMPC); J–O—Trechus cardioderus athonis Schatz. (J—Greece, Yoanina; K—Greece, Attica; L—Montenegro, Bay of Kotor; M—Greece, Cephalonia; N—Bulgaria, Pirin Mts., Oshtava Vill.; O—Bulgaria, Šarlir; NMPC); P—Trechus strandzhensis Kost. & Bekch. (Strandzha Mts., according to Kostova & Bekchiev 2023).