Haplocladon Gorham, 1883

Kundrata, Robin, Hoffmannova, Johana, Hinson, Kevin R., Keller, Oliver & Packova, Gabriela, 2022, Rhagophthalmidae Olivier, 1907 (Coleoptera, Elateroidea): described genera and species, current problems, and prospects for the bioluminescent and paedomorphic beetle lineage, ZooKeys 1126, pp. 55-130 : 55

Genus Haplocladon Gorham, 1883

Haplocladon Gorham, 1883b: 249 [as a subgenus of Diplocladon Gorham, 1883]. Gender: neuter. Type species. Haplocladon gorhami Kundrata, 2022, nom. nov. [replacement name for Diplocladon hasseltii Gorham, 1883b]; by monotypy.

Literature.

Gorham (1883b: 249): original description; Gorham (1895: 310): remark; Gorham (1903: 330): species description; Olivier (1910: 8): catalogue; Wittmer (1944: 211): catalogue; Crowson (1955: 68): remark; Paulus (1972: 49): remark; Li and Liang (2008: 109): remark [as D. haplocladon [sic!]]. In addition to the aforementioned literature, this genus was included in a PhD thesis by Jeng (2008).

Remarks.

Gorham (1883b) originally described Haplocladon as a subgenus of Diplocladon but later treated it as a separate genus ( Gorham 1895, 1903). Unfortunately, he named type species of both Diplocladon and Haplocladon as " hasseltii " ( Gorham 1883a, b), which probably confused some subsequent authors who treated Haplocladon as a synonym of Diplocladon ( Olivier 1910; Wittmer 1944; Li and Liang 2008). Crowson (1955) and Paulus (1972) again considered Haplocladon a separate genus. Since Haplocladon differs at first sight from Diplocladon by the unipectinate antennae (versus bipectinate in Diplocladon ), we prefer to keep Haplocladon at a generic level. Because Diplocladon hasseltii Gorham, 1883a and Diplocladon hasseltii Gorham, 1883b (described in subgenus Diplocladon Haplocladon ) are primary homonyms, the latter junior name is permanently invalid (Art. 57.2 of the Code; ICZN 1999) and should be replaced by a new name (see below). Currently, Haplocladon contains two species, one from Indonesia and one from southern India. Based on the available figures, specimens reported by Haneda (1950) from Singapore and identified as Diplocladon hasseltii , which were later mentioned by other authors (e.g., Harvey 1952; Haneda 1955; Lloyd 1971; Lloyd 1978; Crowson 1981; Haneda 1985; Kawashima et al. 2010), are probably members of Haplocladon .