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Body flattened. Head: medial sulcus present plus a parallel
sulcus on each side toward eye; frons projecting. Antennae:
8-segmented, segments transverse, apical segments thickened;
segment I slightly compressed laterally; II shorter and narrower
than I; III longer than IV and V, compressed laterally, tooth-like
projection on outer apical margin; IV-VI compressed laterally,
IV with smaller tooth similar to III; VII compressed laterally;
VIII elongate, as long as V-VII combined; reaches middle
of elytra. Pronotum: side margins evenly convergent from base
to apex; margined laterally; basal impression present; basal margin
bisinuate; wider than long; tooth in anterior angles; longitudinal
sulcus on disc. Scutellum: quadrate. Elytra: 8 punctures,
no scutellar row; tricostate, 1st costa most pronounced, 3rd extends
from humerus to middle of elytra; side margins dentate; apical
margins more dentate, laminate, subcordate-emarginate; exterior
apical angles rounded. Venter: five visible abdominal sterna.
Legs: tarsi with 2 claws.
Key to the Platocthispa known from La Selva
1. Vertex of head with faint medial sulcus 2
Vertex of head with faint medial carina Platocthispa championi
2. Antennal segment I cylindrical Platocthispa emorsitans
Antennal segment I subglobose Platocthispa sp.1
Species known from La Selva:
Platocthispa championi (Baly)
Platocthispa emorsitans (Baly)
Platocthispa sp.1 Staines ms.
Page authors:
C. L. Staines, 3302 Decker Place, Edgewater MD 21037. Staines.Charles@NMNH.SI.EDU
John T. Longino, The Evergreen State College, Olympia WA 98505 USA. longinoj@evergreen.edu