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Title: CONTRIBUTIONS TO THE KNOWLEDGE
OF OLLA CASEY (COLEOPTERA: COCCINELLIDAE: COCCINELLINI): NEW
SPECIES FROM THE GALAPAGOS ISLANDS, UPDATES ON THE
DISTRIBUTION OF OF O.V-NIGRUM (MULSANT)
Author
Submitted to: Proceedings of the Entomological
Society of Washington
Publication
Type: Peer Reviewed Journal
Publication
Acceptance Date: September 25, 2003
Publication Date: June 29, 2004
Citation:
Vandenberg, N.J. 2004. Contributions to the knowledge of
olla casey (coleoptera: coccinellidae: coccinellini):
new species from the galapagos islands, updates on the
distribution of of o.v-nigrum (mulsant). Proceedings of
the Entomological Society of Washington. 106: 619-626
Interpretive Summary: Lady beetles are
important predators of crop and garden pests. A New
World genus consists of arboreal species which feed on a
variety of soft bodied insects such as aphids, psyllids,
whiteflies, and thrips. As such, these species are
considered a major component of natural pest control in
commercial fruit and nut plantings, and they have been
released for biological control of pest species on a
number of island and continental masses in the Pacific,
European, Asian, Australian and Ethiopian regions of the
World. In order to utilize the full predatory potential
of these beneficial species, we need to know the proper
species names and classification so that pertinent
literature can be accessed on their diverse feeding
habits, distributions, and seasonality. The present
contribution adds a new species to the genus and
provides characters for differentiating it from closely
related species. It also updates what is known of their
distribution due to recent releases associated with
biological control of Leucaena psyllid (a key pest of
the economically important Leucaena tree). This work
will aid agriculturalists, biological control
practitioners, and ecologists in identifying and better
understanding the species they encounter.
Technical Abstract: A new species of Olla
Casey is described from Isabela Island of the Galapagos
Archepelago. Earlier, the single known example of this
species was mistaken for Olla hageni Vandenberg, a
closely related species which occurs on the neighboring
island of Santa Cruz. A diagnosis, habitus drawing, and
key details of the anatomy and morphology of the new
species are provided and compared to related members of
the genus. The habits and distribution of the genus are
reviewed and updated distributional data provided for O.
v-nigrum Mulsant, a widespread species of temperate and
tropical America which has been released in a number of
countries for biological control purposes.
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