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Expert(s). Expert: Brian Kensley & Marilyn Schotte. Notes: National Museum of Natural History. Reference for: Armadillidium vulgare. Other Source(s). Source. Biology. Woodlice feed on dead organic matter, which they detect by means of taste and smell (2). During the breeding season, reproductive females develop a . Armadillidium sp.? – Armadillidium vulgare Pillbug caught in a spider web – Armadillidium vulgare Terrestrial crustacean – probably Porcellio scaber.

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The molting cycle of males and non-reproducing females, called the normal intermolt, takes about 29 days.

Bundles from each mating incident form rings within the oviduct, so that muscle cells around the oviduct can pressurize the bundles to release the immobilized spermatozoa onto oocytes that pass through these rings during oviposition.

Journal of Experimental Zoology. Armadillidium vulgare, photo by Gianni De Bellis, used with permission. Oxford University Press; On the other hand, Edney noted that the distribution of the more common isopods in the United Kingdom was by no means always related to moisture.

Due to admadillidium possibility of a scarcity of males, an eventual high prevalence of Wolbachia sp.

armadillicium For about 10 days after this, the female’s sexual receptivity is at its highest. Pillbug adults, Armadillidium vulgare Latreille. Adaptive latitudinal shifts in the thermal physiology of a terrestrial isopod.


Conglobation in the Pill Bug, Armadillidium vulgare, as a Water Conservation Mechanism

Water-loss rates declined as relative humidity increased. Evidence for Woodlice-specialization in Dysdera Spiders: Lack of woodlice in the diet of the young Dysdera hungarica can impede growth and development. Terrestrial invertebrates in flooded grassland: We used the same individuals for respirometry under vylgare and free conditions, with the order of measurement randomized among isopods.

May be maintained by periodic fire. A secondary pair of smaller antennae is present but vestigial and serves no known biological purpose.

Metabolic Rates The rate of CO 2 release was significantly reduced during conglobation. This suggested that conglobation may also serve a water-conservation function. They have three tagmata: Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Accessed November 29, at http: To correct for this, both groups of isopods were treated to the same handling conditions.

During conglobation, the volume of A. This has caused the pheromone to be hypothesized to serve as a potential mate-finding tool, or as an aid in synchronization of female molting cycles.


In dunes near seas and oceans this is compounded by the influence of salt in the air and soil. The Armadillidium vulgare reproduce sexually during the spring and summer months. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This species has limited abilities of sight, smell, and touch, provided through ommatidia, esthetascs and tactile setae, respectively.


Another possibility is anaerobic metabolism. For 15 days, the new molt cycle begins, same as the normal intermolt. Given these considerations, the measurements of CO 2 release should provide an accurate estimate of metabolic rates. Studies in animal aggregations: This behavior helps decrease the surface area of any one individual in the group, and thereby exposure to the moisture-depleting external heat.

Edneyfound that the pleopodal area was responsible for higher rates of water loss than the cuticle or other areas. Upon entering an isopod host, the entomopathogenic P.

Armadillidium vulgare – Wikipedia

This species has evolved heavily encrusted armor, repugnatorial glands armadillidimu on the pereon which release unpleasant secretions, and conglobation. Woodlice Woodlice of Europe Crustaceans described in Materials and Methods Animal collection and maintenance Several hundred isopods were collected at a residence in January and February ofin Las Vegas, Nevada. Oniscidea — revised and updated version” PDF. Scottish sites are mostly coastal the record from the northern coast is erroneus.