Taxonomic review of the Dichotomius mamillatus group (Coleoptera: Scarabaeidae), with a description of a new species, Dichotomius (Dichotomius) gandinii sp. nov., from western Amazonia

被引:17
作者
Rossini, Michele [1 ]
Vaz-de-Mello, Fernando Z. [2 ]
机构
[1] Ist Agrario Villa Caprile, Via Caprile 1, I-61121 Pesaro, Marche, Italy
[2] Universidade Fed Mato Grosso, Departamento Biol Zool, Instituto Biociencias, . Fernando Correa Costa, 2367, Boa Esperanca, BR-78060-90 Cuiaba, Brazil
来源
AUSTRAL ENTOMOLOGY | 2020年 / 59卷 / 01期
关键词
Dichotomiini; dung beetles; male genitalia; Neotropics; new species; South America; DUNG BEETLES COLEOPTERA; SELENOCOPRIS BURMEISTER; MALE GENITALIA; REVISION; REDESCRIPTION; ASSEMBLAGES; PASTURES; EVOLUTIONARY; SPECIATION; ADJACENT;
D O I
10.1111/aen.12443
中图分类号
Q96 [昆虫学];
学科分类号
摘要
We conducted a morphologically based taxonomic revision of the Dichotomius mamillatus species group (Scarabaeinae). A new species, Dichotomius (Dichotomius) gandinii sp. nov., from western Amazonia is described, illustrated and included in this group, along with Dichotomius (Dichotomius) mamillatus (Felsche, 1901), Dichotomius (Dichotomius) robustus (Luederwaldt, 1935) and Dichotomius (Dichotomius) worontzowi (Pereira, 1942). The external and genital morphology of the mamillatus group and its species are defined through an in-depth examination of the surviving type material, as well as hundreds of reference specimens deposited in several natural history collections. An illustrated identification key to the Dichotomius species of the group is provided. Pinotus calcaratus Arrow, 1913 (currently Dichotomius calcaratus) is considered to be a junior subjective synonym of Dichotomius (Dichotomius) mamillatus. This research further resolves the many taxonomic questions that are still hampering the correct identification of Dichotomius species in the Neotropics, providing key diagnostic tools for researchers interested in these scarab beetles. The comprehensive morphological study of the D. mamillatus group highlights the important taxonomic value of the often-overlooked endophallic structures, as well as their central role in informing hypotheses of systematic relationships.
引用
收藏
页码:52 / 73
页数:22
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