Diptilon crassum, Zerny, 1912

Pinheiro, L. R. & Gaal-Haszler, S., 2015, Illustrated catalogue of Neotropical Ctenuchina, Euchromiina and Pericopina types (Lepidoptera, Erebidae, Arctiinae, Arctiini) described by Hans Zerny, with discussion on their taxonomic status, Zootaxa 3925 (4), pp. 505-535 : 511

crassum Zerny, 1912

( Figs. 7 and 56 )

Diptilum crassum Zerny, 1912b: 123 . Holotype male by monotypy: COLOMBIA, Bogotá; with three handwritten labels “Steinheil, Bogota, coll 880 II”, “gen n. Diptilon sp.”, and “ Diptilum crassum Zerny type ♂”.

Current combination. Diptilon crassum Zerny, 1912 .

Condition of the type. Right antenna, hindlegs and small part of the left forewing missing. Specimen poorly mounted, with many loose scales littering the wings.

Remarks. Diptilon Prittwitz, 1870 is probably non-monophyletic, judging from the morphological variety found among the 16 valid species currently placed in it. There appear to exist at least two groups of species that may form unrelated monophyletic entities. One is evidently linked to D. telamonophorum Prittwitz, 1870 (type species of the genus), and D. crassum may be related to the other group, which comprises D. chrysocraspis Hampson, 1898 , D. sylpha Dognin, 1902 and D. hoffmannsi Rothschild, 1911 . However, the hindwings in these three species are reduced, which is probably the reason why they were assigned to Diptilon . The same does not occur in D. crassum , which indicates that its taxonomic position might be far from settled.

Figures

FIGURES 1 – 24. 1) Eucyane phanoptoides (Lectotype); 2) Eucyane variabilis flavofasciata (Lectotype); 3) Eucyane variabilis variabilis (Lectotype); 4) Pseudophaloe xiphydria (Holotype); 5) Pseudosphenoptera boyi (Holotype); 6) Correbia rufescens columbiana (Lectotype); 7) Diptilum [sic] crassum (Holotype); 8) Ptychotrichos [sic] fenestrifer (Holotype); 9) Episcepsis flavipuncta (Lectotype); 10) Schasiura gymnelioides (Holotype); 11) Heliura hagmanni (Lectotype); 12) Cercopimorpha hoffmanni (Lectotype); 13) Teucer imbecillus (Holotype); 14) Desmotricha josioides (Lectotype); 15) Eucereon lychnis (Lectotype); 16) Eucereon maternum (Holotype); 17) Episcepsis melanoneura (Lectotype); 18) Episcepsis nereus (Lectotype); 19) Ceramidia pinguis (Holotype); 20) Ctenucha reimoseri (Holotype); 21) Episcepsis rotundipennis (Lectotype); 22) Eucereon sericeum (Lectotype); 23) Pompiliodes acroleuca (Lectotype); 24) Calonotos acutipennis (Lectotype). Scale bars: 1 cm.

FIGURES 55 – 65. 55) Eucyane variabilis flavofasciata, genitalia of the lectotype, dorsal view and phallus; 56) Diptilon crassum, genitalia of the holotype, ventral view and phallus; 57) Schasiura gymnelioides, genitalia of the holotype, ventral view and phallus; 58) Cercopimorpha hoffmanni, genitalia of a specimen from Tambopata, Peru, deposited at MZSP, dorsal view and phallus; 59) Eucereon lychnis, genitalia of the lectotype, lateral view and phallus; 60) Eucereon lychnis, genitalia of one of the female paralectotypes, lateral view; 61) Ceramidia pinguis, genitalia of the holotype, lateral view and phallus; 62) Eucereon sericeum, genitalia of the lectotype, ventral view and phallus; 63) Calonotos acutipennis, genitalia of the lectotype, lateral view and phallus; 64) Abrochia spitzi, genitalia of a specimen without locality deposited at MZSP, dorsal view and phallus; 65) Heliura zonata ab. aurantiaca, genitalia of Zerny’s male, dorsal view and phallus. Scale bars: 1 cm.