Metrionella calva ( Boheman, 1855 )

Sekerka, Lukáš, 2020, Commented catalogue of Cassidinae (Coleoptera: Chrysomelidae) of the state of São Paulo, Brazil, with remarks on the collection of Jaro Mráz in the National Museum in Prague, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 60 (2), pp. 667-707 : 677

* Metrionella calva ( Boheman, 1855)

New record. BRAZIL: Sඞඈ Pൺඎඅඈ: without further data, 3 spec., J. Mráz leg. (NMPC, 1 LSPC).

Distribution. Bolivia, Brazil, Paraguay, and Venezuela. New to São Paulo.

Remarks. One of the abovementioned specimens is provided with the following identification label: ‘ Metriona | placans m. [hw] | Spaeth det. | n. sp. [hw] | ( Metrionella ) [hw] | n. subg. [hw] [white printed label with some rows handwritten (hw) by Spaeth]’; however, Spaeth did not mention this specimen in the description of M. placans thus it does not belong to the type series. Moreover, it differs quite conspicuously from M. placans in more convex elytra with a distinct postscutellar hump (absent in M. placans ), clypeal grooves deep and enclosing a short triangular field reaching only middle of the clypeus (vs. shallow grooves enclosing a long field reaching almost the base of antennae), and thorax black (vs. mesoventrite with large yellow patch on each side). These characters seem to match quite exactly M. calva , which so far has been reported from Brazil without additional data, despite the fact that SඉൺൾඍΗ (1932b) mentioned that it is not a rare species in the tropical America. However, he did not mention its distribution more precisely.