Bagous collignensis

ROBERTO CALDARA, CHARLES W. O’BRIEN & MASSIMO MEREGALLI, 2017, A phylogenetic analysis of the aquatic weevil tribe Bagoini (Coleoptera: Curculionidae) based on morphological characters of adults, Zootaxa 4287 (1), pp. 1-63 : 47-48

24. Bagous collignensis group

Diagnosis. Apex of penis body angulately explanate, more or less sagittate (char. 59.1), with lateral margin behind dorsal process acute (char. 103.1). Dorsal process with apex directed backward (char. 94.1), with setal brush situated anteromedially (char. 92.2). Penis body widest in front of dorsal process (char. 97.1), broad area behind dorsal process depressed.

Remarks. This group was present as a monophyletic clade also in BI (94% pp), ML (70% bs) and MP (not supported, 49% sr). The molecular analysis ( Fig. 12 ) included this group in the B. frit clade, with a strong support (98% pp). All the species included in this group share an almost identical penis, differing only in length and in the shape of the more or less sagittate apex, or by the lateral margin laterad and distad of the orifice being denticulate (as in B. confusus , char. 65.1). Some species, like B. collignensis , B. claudicans , B. rufimanus , B. longitarsis and B. vivesi , are also very similar externally, differing only by small features (length of tarsi and punctures of the pronotum). Other species, like B. rotundicollis , B. riedeli and B. lyali , are characterized mainly by a slender body, flattened elytral dorsum and long legs. However, B. lyali is distinguishable from the other two species by the dense pubescence of the sixth funicular segment (char. 22.1). On the contrary, B. diglyptus is easily distinguished by its robust broad-oval body.

This group is composed of Palaearctic, North American and Indian species.

Species included. NAR: ¹ Bagous bituberosus LeConte, 1876 , ¹ B. nebulosus LeConte, 1876 , ¹ B. pauxillus Blatchley, 1916 , ¹ B. pusillus LeConte, 1876 ; ORR: *4 B. confusus O'Brien, 1995 , ¹ B. myriophylli O'Brien, 1995 : PAL: ¹ B. claudicans Boheman, 1845 , *§¹ B. collignensis (Herbst, 1797) , ¹ B. diglyptus Boheman, 1845 , §¹ B. longitarsis Thomson C.G., 1868 , *³ B. lyali Caldara & O’Brien, 1998 , ² B. riedeli Caldara & O’Brien, 1998 , *² B. rotundicollis Boheman, 1845 , ¹ B. rufimanus Pericart, 1989 , ¹ B. tersus Egorov & Gratshev, 1990 , ¹ B. vivesi González, 1967 .

Figures

FIGURE 12. Mitochondrial cytochrome oxidase I analysis. Bayesian consensus tree (50 % majority rule). Codes after the species name are GenBank Accession Numbers. Scale bar unit: expected substitutions per site.