Euwallacea fornicatus

Gomez, Demian F., Skelton, James, Steininger, M. Sedonia, Stouthamer, Richard, Rugman-Jones, Paul, Sittichaya, Wisut, Rabaglia, Robert J. & Hulcr, Jiri, 2018, Species Delineation Within the Euwallacea fornicatus (Coleoptera: Curculionidae) Complex Revealed by Morphometric and Phylogenetic Analyses, Insect Systematics and Diversity 2 (2018), No. 2, pp. 1-11 : 8-9

E. fornicatus Species Complex

Female: Length 1.8–2.9 mm; color dark brown to almost black. Frons broadly convex, surface mostly reticulate, punctures sparse. Antennal club type 3, posterior face of club with segments 2 and 3 partially visible ( Hulcr et al. 2007). Pronotum as long as wide,

subcircular anteriorly, coarsely serrate; summit slightly behind middle; asperities in front of summit, smooth and reticulate behind. Elytra with strial and interstrial punctures in rows; striae not impressed, punctures moderately large, distinct, setae absent; interstriae three to four times as wide as striae, punctures uniseriate, rows of erect interstrial hairlike setae from base to apex. Declivity convex, gradually sloped; striae weakly impressed; interstrial denticles slightly larger than on disc. Posterolateral margin of declivity costate and broad. This species complex includes the four species from the classification tree revealed by the morphological analysis ( Fig. 5 ). For final identification, DNA sequencing data will often be needed.

Figures

Fig. 5. Classification tree from the CART analysis built on 60 individuals representing the four clades within the E. fornicatus complex. Relevant characters for the node splits are shown.Classification rates are expressed as the number of correct classifications divided by the number of observations (individual beetles) in the node for the individuals used to train the CART model.