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The most recent complete species
level treatment is in volume III of the the Fauna Hawaiiensis (Sharp
and Scott, 1908). They described 142 species and organized them in 13
genera. Two species of Cillaeopeplus were described by Ford
(1958).
Prosopeus
Murray 1864 (= Nesopeplus, Nesopetinus, Sharp and Scott,
1908; Ewing 2004)
Murray described Prosopeus subaeneus
from a mislabeled specimen in the Natural History Museum London. It is labeled
"Caffraria" (=South Africa), but is clearly a representative
of the Nesopeplus scottianus species complex from the Big Island
of Hawaii.
Orthostolus
Sharp 1908
Includes 11 described species. Species
1-4 are associated with Lobelioids, primarily Clermontia,
Lobelia, and Trematolobelia and species 5-11 are associated
with Acacia koa. All species are primarily found
beneath rotting bark.
Cyrtostolus
Sharp 1908
Contains a single species C. subalatus from
Maui. It is related to the Acacia koa associated species of Orthostolus.
Cillaeopeplus
Sharp 1908
A monophyletic group limited to Charpentiera
and Pisonia. They are extremely flattened to move in between the
decaying concentric rings that comprise the branches and trunks of the
host trees.
Gonioryctus
Sharp 1878
The largest species of endemic sap beetles
are in this genus, with some being ~10mm in length. They differ from Goniothorax
in having the lateral margins of the prothorax always curved in habitus
view and the legs are less robust. They can be found in association
with a large number of flowering plants and ferns.
Goniothorax
Sharp 1908
Similar to Gonioryctus except they have the legs
are more elongate and the lateral margins of the prothorax are strait or
angular in habitus view. They are primarily associated with Cheirodendron
and to a lesser extent other Araliaceae and ferns.
Eunitidula
Sharp 1908
A single described species, E. sublaevis is
associated with Cheirodendron.
Nesapterus
Sharp 1908
Species placed
in Nesapterus have reduced flight wings and depend on ferns in
the genus Cibotium for their development. They are found
during the day within wet decaying rachi and at night they can sometimes
come out in large numbers to disperse. When dispersing they can be
beaten from any plant in forests with appropriate Cibotium
detritus.
Eupetinus
Sharp 1908
Species in this group are the most difficult
to identify of the Hawaiian endemic sap beetles. They are often numerous
and most species can be found on a wide variety of host plants.
Apetinus
Sharp 1908
Similar to Eupetinus species except with reduced
flight wings. Most species are found in leaf litter in very wet
forest.
Apetasimus
Sharp 1908
The species in this group are the least
frequently collected of the Hawaiian endemic sap beetles.
Ford, E. J., Jr. 1958. The endemic genus Cillaeopeplus
of Hawaii, with descriptions of two new species (Coleoptera: Nitidulidae).
Proc Haw Ent Soc 16:341-344.
Sharp, D.,
and H. Scott. 1908. Coleoptera III. 435-508 in
Fauna Hawaiiensis (D. Sharp, ed.).
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