title: Eco-morphological studies on pleopodal lungs and cuticle in Armadillidium species (Crustacea, Isopoda, Oniscidea).
abstract: Terrestrial isopods (Crustacea, Isopoda, Oniscidea) have adapted to land life by diverse morphological, physiological and behavioral changes. Woodlice species exhibit a large variety in this respect, their preferences ranging from moist to dry habitats. These moisture preference values are related to various morphological adaptations, rendering terrestrial isopods amenable to studying morphological adaptations to terrestrial life. We performed a comparison of four Armadillidium species (Armadillidium zenckeri, Armadillidium nasatum, Armadillidium versicolor, Armadillidium vulgare), by quantifying two morphological traits: the extent of the interfacial endothelium between the respiratory space and the hemolymph within pleopodal lungs and the thickness of tergite cuticle, which are 'key factors' in determining protection from desiccation. These values were measured from light micrographs of cross-sectioned lungs. The cosmopolitan A. vulgare, as a habitat generalist, seems to be the most resistant against desiccation and other environmental conditions, while A. zenckeri is the most sensitive one. Light microscopic studies revealed that the four species can be ordered similarly, if we compare them by the extension of the endothelial interface and cuticle thickness, suggesting that these morphological traits are important determinants of their distribution on habitat, microhabitat scales and through the existence of suitable habitats - together with many other factors - the geographical pattern of species occurence.
authors: Institute for Biology, Faculty of Veterinary Science, Szent István University, Rottenbiller str. 50, H-1077 Budapest, Hungary. csonka.diana@gmail.com
authors: Diána
authors: D
authors: Csonka
authors: Katalin
authors: K
authors: Halasy
authors: Péter
authors: P
authors: Szabó
authors: Polona
authors: P
authors: Mrak
authors: Jasna
authors: J
authors: Strus
authors: Elisabeth
authors: E
authors: Hornung
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D004777:Environment; D006458:Hemolymph / Q000502:physiology; D006814:Hungary; D033321:Isopoda / Q000033:anatomy & histology* / Q000502:physiology; D008168:Lung / Q000033:anatomy & histology; D008297:Male; D013045:Species Specificity