Mycotretus distinguendus Arrow, 1909

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 : 22

9. Mycotretus distinguendus Arrow, 1909

Mycotretus distinguendus Arrow, 1909: 196 . Type locality: “ Mexico, Toxpam” [apud Gorham 1888: 60]”.

Mycotretus distinguendus – Kuhnt 1911: 54. — Blackwelder 1945: 466. — Alvarenga 1994: 24.

Primary type

Lectotype, here designated ( Fig. 3C )

MEXICO • “Type [disc-shaped label, red/orange border, printed] \ Mycotretus distinguendus , type, arrow [handwritten] \ sobrinus, Lac. [handwritten] \ B.C.A., Col., VII. Mycotretus [printed] \ Toxpam [printed] \ Mexico., Salle, Coll. \ LECTOTYPE, Mycotretus distinguendus Arrow, 1909 [red label, printed]”; BMNH.

Other specimens examined

Paralectotypes

MEXICO • 1 spec.; “ Toxpam [handwritten], Mexico., Salle, Coll. [printed] \ Mycotretus sobrinus Guer , apud Sallé [handwritten] \ B.C.A., Col., VII. Mycotretus [printed] \ PARALECTOTYPE, Mycotretus distinguendus Arrow, 1909 [yellow label, printed]”; BMNH • 1 spec.; “ Toxpam [handwritten], Mexico., Salle, Coll. [printed] \ 2409 [printed] \ Mycotretus sobrinus Guer , apud Sallé [handwritten] \ B.C.A., Col., VII. Mycotretus [printed] \ PARALECTOTYPE, Mycotretus distinguendus Arrow, 1909 [yellow label, printed]”; BMNH • 1 ♀ (dissected); “ Mexico., Salle, Coll. [printed] \ Toxpam [printed] \ Mycotretus sobrinus Guer , apud Sallé [handwritten] \ B.C.A., Col., VII. Mycotretus [printed] \ PARALECTOTYPE, Mycotretus distinguendus Arrow, 1909 [yellow label, printed]”; BMNH .

Additional material

MEXICO • 1 ♂ (dissected); “Coleção M. Alvarenga [printed] \ Homeotipo [red label, printed] \ mex. [front] 56, 143 [back] [handwritten] \ 1680 [printed] \ Comparado com tipo [printed] Mycotretus distinguendos [sic] Arrow, 1909 [handwritten] M. Alvarenga det. 1971 [printed]”; MNRJ.

Distribution

Mexico.

Remarks

Mycotretus distinguendus was described by Arrow (1909) based on individuals first identified by Gorham (1888) as M. sobrinus Guérin-Méneville ( Fig. 22F ). According to Arrow (1909: 196) “The Mexican form recorded as Mycotretus sobrinus, Guer. , by Mr. Gorham in the same work must similarly be distinguished from that Brazilian species. It is much smaller, relatively shorter, the knees blacker, and the abdominal lines more marked. It may be called M. distinguendus ”. We compared the male genitalia of both M. distinguendus and M. sobrinus and observed that they are clearly separated species. We also noted that M. distinguendus differs from other Mycotretus in having the first antennomere of the antennal club conspicuously wider than succeeding antennomeres.

Figures

Fig. 3. Primary types (dorsal, labels). A–A’. Holotype of Mycotretus tucuriensis Alvarenga, 1983. B–B’. Lectotype of M. centralis Arrow, 1909. C–C’. Lectotype of M. distinguendus Arrow, 1909. D–D’. Holotype of M. nigromanicatus Boyle, 1954. E–E’. Lectotype of M. nubifer Casey, 1916. F–F’. Lectotype of M. lesueuri (Chevrolat, 1835). Scale bars = 1 mm.

Fig. 22. A–C, D–F. Primary types (dorsal, labels). A–A’. Holotype of Mycotretus trifasciatus Guérin, 1956. B–B’. Lectotype of Erotylus cinctellus Guérin-Méneville, 1841 [= M. cinctellus; synonym of Mycomystes melanophthalmus (Duponchel, 1825)]. C–C’. Lectotype of M. fallax Guérin-Méneville, 1841. D–D’. Specimen of M. sedecimguttatus (Guérin-Méneville, 1844) from the UMZC collection. E–E’. Lectotype of Erotylus (Brachymerus) sobrinus Guérin-Méneville, 1841 [currently M. sobrinus (Guérin-Meneville)]. F–F’. Lectotype of M. dichrous Kirsch, 1876. Scale bars: A = 0.5 mm; B–F = 1 mm.