Dorcadion decipiens, Germar, 1824

Dascălu, Maria-Magdalena, Caba, Florina-Georgiana & Fusu, Lucian, 2022, DNA barcoding in Dorcadionini (Coleoptera, Cerambycidae) uncovers mitochondrial-morphological discordance and the hybridogenic origin of several subspecies, Organisms Diversity & Evolution (New York, N. Y.) 22 (1), pp. 205-229 : 222

Dorcadion decipiens

The taxonomic status of D. decipiens based on molecular data is not clear. We included only one specimen in the analysis, and it is retrieved as sister to nominotypical D. pusillum only in the BI analyses ( Fig. 2 ). In the ML analyses (Fig. 1), it is retrieved within nominotypical D. pusillum , but on a long branch. Probably because of this placement of D. decipiens , in the PTP analysis the nominotypical D. pusillum from Ukraine and D. decipiens are both distinguished as separate species; mPTP includes D. pusillum , D. decipiens and D. murrayi in the same species. In GMYC, D. decipiens is always included in the nominotypical D. pusillum , even if on the tree they are reciprocally monophyletic ( Fig. 2 ) and are separated by 12 substitutions, three times more than D. murrayi and D. pusillum pusillum (Fig. 3). Morphologically, D. decipiens has a pubescence pattern similar to that of nominotypical D. pusillum but it is comparatively large and elongated, similar to D. murrayi . The mean interspecific distance between D. decipiens and these two species is 2 to 3% ( Tables S2 and S4), at the threshold between intraspecific and interspecific variability.

Figures

Fig. 2 Maximum clade credibility ultrametric tree generated with Bayesian inference in BEAST from 162 Dorcadionini COI sequences (152 from this study, 10 from GenBank). Clades with numerous sequences and no delimitation issues are collapsed, with numbers