New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy) Author Taiti, Stefano Author Montesanto, Giuseppe text Zoosystema 2018 2018-06-05 40 11 197 226 journal article 10.5252/zoosystema2018v40a11 19cf9485-c4c2-4bf1-a834-f13dfcfc50e1 1638-9387 3741502 urn:lsid:zoobank.org:pub:E8AFD7E7-4FDD-408E-BB77-75E61F2BF22F Genus Alloschizidium Verhoeff, 1919 TYPE SPECIES. — Armadillidium pruvoti Racovitza, 1907 by monotypy. REMARKS Schmalfuss (2008) pointed out that all the genera of Armadillidiidae possessing a schisma on the pereonite 1 ( Eluma Budde-Lund, 1885 , Ballodillium Vandel, 1961 , and Alloschizidium ) fall within his definition of the genus Schizidium Verhoeff, 1901 . However, he was not certain that all these genera belong to a monophyletic group and the presence of the schisma might be due to convergence. Therefore, he kept Schizidium as a separate genus distributed from Greece to Iran . The genus Alloschizidium appears to be very similar to Paraschizidium , with a possible synapomorphic character for these two genera being the subovoidal, instead of spherical, shape of the ball when the animals roll up (see also discussion in Taiti & Ferrara 1996 ). Then, the autapomorphic characters for Alloschizidium compared with Paraschizidium is the presence of the schisma. As remarked by Schmalfuss (2008) a molecular investigation might help to clarify the interrelationships among all the above mentioned genera.