Mycotretus bistrioculatus Alvarenga, 1983

Pecci-Maddalena, Italo Salvatore de Castro, Lopes-Andrade, Cristiano & Skelley, Paul, 2023, Catalogue of Mycotretus Lacordaire, 1842 (Coleoptera: Erotylidae: Tritomini): an annotated, illustrated and historical approach, European Journal of Taxonomy 876 (1), pp. 1-182 : 16-17

1 . Mycotretus bistrioculatus Alvarenga, 1983

Mycotretus bistrioculatus Alvarenga, 1983: 583 . Type locality: “ BRASIL, Amazonas, Estirão do Equador (coordenadas aproximadas, long 71º38’W e lat 4º33’S)”.

Mycotretus bistrioculatus – Alvarenga 1994: 21.

Primary type

Holotype ( Fig. 2A )

BRAZIL • ♂ (dissected); “Coleção M. Alvarenga [printed] \ HOLOTIPO [red label, printed] \ Estirão do Equador , Amazonas, Brasil X.1979, M. Alvarenga [printed] \ M [printed] \ Mycotretus bistrioculatus m. [handwritten] M. Alvarenga det. [printed] 1983 [handwritten]”; MNRJ.

Other specimens examined

BRAZIL • 1 ♀ (dissected); “Coleção M. Alvarenga [printed] \ Paratipo [red label, printed] \ Estirão do Equador , Amazonas, Brasil X.1979, M. Alvarenga [printed] \ M [printed] \ Mycotretus bistrioculatus m. [handwritten] M. Alvarenga det. [printed] 1983 [handwritten]”; MNRJ .

Distribution

North Brazil.

Remarks

Penile flagellum elongated, thin, sclerotized at the anterior third of virga and with a desclerotized portion (approximately 2× the length of head) connecting virga and head. Head V-shaped, each arm separating from each other anteriorly and ending in two outer tips slightly bent laterally. Mycotretus bistrioculatus is similar to M. argus ( Fig. 26F ), M. sexoculatus chaparensis ( Fig. 12D ) and M. pulchellus ( Fig. 34F ) in body shape and arrangement of circular elytral spots. There are few morphological differences in the flagellar head (e.g., lateral borders more or less elongated, sclerotized). The status of these species requires examining more specimens, which will be studied in future research.

Figures

Fig. 1. The largest historical collections of Neotropical Erotylidae Latreille, 1802.A–C. Museum national d’histoire naturelle (MNHN, Paris, France). A. Part of the MNHN Erotylidae collection. B–C. Drawer from Oberthür collection containing several Mycotretus Lacordaire, 1842 primary types. D–E. Natural History Museum (BMNH, London, UK). D. Drawer containing part of the Gorham collection including several Mycotretus described in the Biologia Centrali-Americana. E. The type specimen of Mycotretus hirudo Gorham, 1888. F. Cabinet of the Crotch Erotylidae Collection from University Museum of Zoology (UMZC, Cambridge, UK), one of the most representative Erotylidae collections of the world. G. Drawer of the Brême collection from Museo Regionale di Scienze Naturali (MRSN, Torino, Italy), containing especially Duponchel and Lacordaire primary types.

Fig. 2. Alvarenga holotypes (dorsal, labels). A–A’. Mycotretus bistrioculatus Alvarenga, 1983. B–B’. M. fragosoi Alvarenga, 1983. C–C’. M. lopesi Alvarenga, 1989. D–D’. M. luizi Alvarenga, 1983. E–E’. M. octoculatus Alvarenga, 1983. F–F’. M. quadrioculatus Alvarenga, 1983. Scale bars: A–B, D–F = 0.5 mm; C = 1 mm.

Fig. 26. A–B, D–F. Primary types (dorsal, labels). A–A’. Lectotype of Mycotretus virgatus Kuhnt, 1910 [= Iphiclus virgatus (Kuhnt), comb. nov.]. B–B’. Holotype of M. ziczac ziczac Kuhnt, 1910. C–C’. Specimen of M. aestuans Lacordaire, 1842 from the Alvarenga collection (MNRJ, Brazil). D–D’. Lectotype of M. ambulator Lacordaire, 1842. E–E’. Lectotype of M. apicalis Lacordaire, 1842 [current combinationMycomystes apicalis (Lacordaire)]. F–F’. Lectotype of M. argus Lacordaire, 1842. Scale bars: A = see Material and methods; B–F = 1 mm.

Fig. 12. Primary types (dorsal, labels). A–A’. Lectotype of Mycotretus xanthomelas Crotch, 1876. B–B’. Holotype of M. ornatus partitialis Deelder, 1942. C–C’. Holotype of M. fidelis Deskeskamp, 1939 [= Brachysphaenus (Barytopus) parallelus Kuhnt, 1909]. D–D’. Holotype of M. sexoculatus chaparensis Delkeskamp, 1957.E–E’. Holotype ofM. ziczac serenus Delkeskamp, 1957. F–F’. Holotype of M. zischkai Delkeskamp, 1957. Scale bars: A, C, E = 1 mm; B, D, F = see Remarks.

Fig. 34. Lacordaire primary types (dorsal, labels) cont. A–A’. Lectotype of Mycotretus palmiphilus Lacordaire, 1842. B–B’. Lectotype of M. partitus Lacordaire, 1842. C–C’. Lectotype of M. pecari Lacordaire, 1842. D–D’. Lectotype of M. polyophthalmus Lacordaire, 1842. E–E’. Lectotype of M. psittacus Lacordaire, 1842. F–F’. Holotype of M. pulchellus Lacordaire, 1842. Scale bars: A–B, E–F = 1 mm; C–D = see Material and methods.