Pattern and Process: Evolution of Troglomorphy in the Cave-Planthoppers of Australia and Hawai’i ‒ Preliminary Observations (Insecta: Hemiptera: Fulgoromorpha: Cixiidae)

  • Andreas Wessel Museum für Naturkunde der Humboldt-Universität zu Berlin, Biosystematics Research Group, Invalidenstrasse 43, D-10115 Berlin
  • Petra Erbe Museum für Naturkunde der Humboldt-Universität zu Berlin, Biosystematics Research Group, Invalidenstrasse 43, D-10115 Berlin Chiang Mai University, The Uplands Program, Faculty of Agriculture, Chiang Mai
  • Hannelore Hoch Museum für Naturkunde der Humboldt-Universität zu Berlin, Biosystematics Research Group, Invalidenstrasse 43, D-10115 Berlin

Abstract

The evolution of troglobites comprises three distinct problems: cave colonization by an epigean ancestor, the evolution of troglomorphies, and intra-cave speciation. The study of cave-dwelling planthoppers has contributed much to our understanding of troglobite evolution and provides useful model systems to test various aspects of the theoretic framework developed in recent years. Most promising in this respect are taxa with several closely related but independently evolved troglobiontic lineages, such as on the Canary Islands, in Queensland/Australia and on the Hawaiian Archipelago. Closely related species often occur in caves with comparable ecological parameters yet differ in their age. Here we use comparative age estimates for Australian and Hawaiian cave cixiids to assess the dynamics of reductive evolutionary trends (evolution of troglomorphy) in these taxa and cave planthoppers in general. We show that the degree of troglomorphy is not correlated with the age of cave lineages. Morphological alteration may not be used to draw conclusions about the phylogenetic age of cave organisms, and hypotheses based on such assumptions should be tested in light of these findings.

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Published
2007-04-01
How to Cite
1.
Wessel A, Erbe P, Hoch H. Pattern and Process: Evolution of Troglomorphy in the Cave-Planthoppers of Australia and Hawai’i ‒ Preliminary Observations (Insecta: Hemiptera: Fulgoromorpha: Cixiidae). AC [Internet]. 2007Apr.1 [cited 2020Jun.3];36(1). Available from: https://ojs.zrc-sazu.si/carsologica/article/view/222
Section
Original papers