Abstracts - Deutsche Zoologische Gesellschaft

100 Zoological Systematics SymposiumO ZS.15 (Su) - ENMorphological versus molecular taxonomy of the Southeast Asian mangrove crabgenera Parasesarma and Perisesarma (Decapoda: Brachyura: Sesarmidae)Nico Ramisch, Christoph D. SchubartInstitut für Biologie 1, Universität RegensburgThe crab genera Parasesarma and Perisesarma are important components of the mangrove ecosystemalong Southeast Asian tropical coastlines. Because of ongoing destruction of large mangroveareas, it is important to investigate the biodiversity of mangrove crabs in terms of species numbers,but also in terms of intraspecific differentiation. To reconstruct the phylogeny of these genera withmorphological and genetic methods we used individuals from two collecting trips to Thailand andpreserved material from different museum collections. After a morphology-based identification ofthe material, we used sequences of the mitochondrial genes 16S rRNA and cytochrome c oxidasesubunit 1 (CO1) to genetically compare the inter- and intraspecific relationships. We also conductedmorphometric analyses to investigate, if possible genetic differences are corresponded at the phenotypiclevel. These data helped to resolve the phylogeny and species delimitation and they forma basis for a new taxonomic classification. During this process, a “16S mtDNA profile” for eachavailable species within both genera was established, which could be used as a molecular barcodefor future identification and classification of samples. This procedure, in addition to re-investigatingdiagnostic external characters will help to establish a better morphology-based identificationsystem by recognizing, which characters are phylogeny-informative and which ones are based onconvergence.O ZS.16 (Su) - ENPhylogeny and bioacoustic evolution in the genus Sphingonotus Fieber, 1852Axel Hochkirch 1 , Martin Husemann 2 , Jana Deppermann 31Fachbereich VI, Biogeographie, Universität Trier; 2 Fachbereich 5, Fachgebiet Ökologie, UniversitätOsnabrück; 3 Fakultät 5, Institut für Biologie, AG Zoophysiologie & Verhalten, UniversitätOldenburgThe evolution of premating barriers is of high importance for speciation events. Grasshoppers useacoustic signals, which are believed to function as specific mate recognition systems and as effectivebarriers to hybridization. The genus Sphingonotus consists of more than 100 species and comprisesseveral recent radiations. Six different types of sound production have been reported in this genus(wing crepitation, tremulation with mid and hind legs, three tegmino-femoral mechanisms of soundproduction). Here we present a phylogenetic analysis of the West-Mediterranean species of Sphingonotususing sequences of mtDNA and one nuclear gene. Our results show that the major morphologicalinnovations evolved only once, whereas the current taxonomic affiliations are in conflict withour data. Two recent radiations (caerulans-group and azurescens-group) are difficult to distinguishwith molecular data, although they use distinct acoustic signals. Our study provides evidence that theevolution of morphological and behavioural innovations might drive speciation processes.