Metallactus Suffrian, 1866

Agrain, Federico A., Chamorro, Maria Lourdes, Cabrera, Nora, Sassi, Davide & Roig-Junent, Sergio, 2017, A comprehensive guide to the Argentinian case-bearer beetle fauna (Coleoptera, Chrysomelidae, Camptosomata), ZooKeys 677, pp. 11-88 : 46-48

Metallactus Suffrian, 1866 Fig. 25

Metallactus Suffrian 1866: 248; Jacoby 1907: 848.

Type species.

Not yet designated.

Diagnosis.

Metallactus includes species that lack a deeply excised lateral edge of the elytra, additionally, the following characters may be useful to segregate species into this genus: posterior margin of intercoxal prosternal process gradually narrowing, pointed; abdomen not exposed; elytral length greater than 2 × length of pronotum ( Chamorro 2013).

Distribution.

Neotropical.

Remarks.

This genus has not been revised since its original description by Suffrian (1866) and its relationship with related genera is presently unclear ( Schöller 2003, Sassi 2015). Furthermore, Jacoby (1907) indicated Metallactus and Griburius to be very problematic to define, and a lot of species can not fit well in either genera. However, a study with a new diagnosis of the genus Metallactus , based on a new set of effective morphological characters is in progress (Sassi, in prep.).

Argentinian species checklist.

1. Metallactus albipes Suffrian, 1866 (CTS).

2. Metallactus albopictus Suffrian, 1866 (BAS, COR).

3. Metallactus argentinensis Jacoby, 1907 (COR).

4. Metallactus bivitticollis (Jacoby, 1907), comb. n. (BAS).

5. Metallactus divisus Jacoby, 1907 (SFE).

6. Metallactus generosus Suffrian, 1866 (CTS).

7. Metallactus inustus Suffrian, 1866 (BAS, CTS).

8. Metallactus luniger Suffrian, 1866 (Argentina).

9. Metallactus nigrofasciatus Suffrian, 1866 (COR, SLS). Host plant: Asteraceae : carqueja ( Baccharis sp.) ( Viana and Williner 1973).

10. Metallactus nigrovittis Jacoby, 1907 (SFE).

11. Metallactus patagonicus Suffrian, 1866 (BAS, COR, MZA, RNO).

12. Metallactus pollens Suffrian, 1866 (CTS).