Macrocheilus alluaudi Burgeon, 1937

Serrano, Artur R. M., 2023, Afrotropical ground beetles of Macrocheilus Hope, 1838 (Coleoptera, Carabidae) description of four new species and faunistic notes, Zootaxa 5256 (1), pp. 1-35 : 12

publication ID	https://doi.org/ 10.11646/zootaxa.5256.1.1
publication LSID	lsid:zoobank.org:pub:CE0AC7CD-E55D-484C-9346-86F16C985DBE
DOI	https://doi.org/10.5281/zenodo.7746799
persistent identifier	https://treatment.plazi.org/id/AE0487C8-F538-FFD3-0986-A25662C2FBB9
treatment provided by	Plazi
scientific name	Macrocheilus alluaudi Burgeon, 1937
status

Treatment

Macrocheilus alluaudi Burgeon, 1937 View in CoL

Figs. 1f, 1g View FIGURE 1 , 2e View FIGURE 2 , 3d View FIGURE 3

Studied material. 1 male: “ Republic of Congo \ Réserve Naturelle des Gorilles de\ Lésio Louna 17– 28.11.2017 \ Batéké Plateau H. Krahnstôver leg.” (Collection P. Sch ̧le, Herrenberg)\\ “ Macrocheilus \ alluaudi \ Burgeon, 1937 ” [h]\ “ A.Serrano det. 2021” [t] [h] .

Remarks. The species was described as a variety of M. labrosus (Dejean, 1831) and later it was elevated to the subspecies level by Basilewsky (1960) due to its well differentiated external morphological characters, such as the absence of a big yellow spot in each elytron ( Figs. 1f, 1g View FIGURE 1 ) and less dense punctuation on the head and pronotum. Later, it was considered a distinct species without any explanation for the change in taxonomic category ( Lorenz 2005; Häckel & Farkač 2013). Taking into account the abovementioned external morphological differences, in addition to the slight different shapes of the labrum and of the median lobe of both forms (cf. Figs. 2e View FIGURE 2 , 3d View FIGURE 3 vs 6e, 7c), we follow the taxonomic treatment given by Lorenz (2005) and Häckel & Farkač (2013). Moreover, the pronotum hind angles in M. alluaudi are rounded while in M. labrosus are dentiform (cf. Figs. 1f, 1g View FIGURE 1 vs Fig. 5i View FIGURE 5 ). In addition, the elytral intervals of the former species have a thin polygonal microreticulation not visible in the latter species. The species is known from Democratic Republic of the Congo ( Basilewsky 1960) and Republic of the Congo ( Lorenz 2021).

Male genitalia ( Fig. 3d View FIGURE 3 ). Median lobe very slightly different from that of M. labrosus , having a lesser rounded apex and the stripes are membranous in its inner sides; the left paramere is very similar in both species (cf. Figs. 3d View FIGURE 3 and 7c View FIGURE 7 ).

Distribution. Congo (Brazzaville), Democratic Republic of the Congo.