Berlese's Primitive Oribatid Mites Author van der Hammen, L. text Zoologische Verhandelingen 1959 40 1 93 http://www.repository.naturalis.nl/document/148866 journal article ORI111 0DC6B575-3CB3-41C1-A3EC-850520AE4487 Heterochthonius gibbus Berlese , 1910 Cosmochthonius (Heterochthonius) gibbus Berlese , 1910, p. 222, pl. 20 fig. 50 1). Heterochthonius gibbus , Grandjean, 1928, p. 235, figs. 1-4. The original description of the species is founded on specimens from the "Monte Falterona", a mountain in Tuscany. In the Berlese Collection I found indeed two preparations (viz. the nos. 80/9 and 80/10) from this locality; they are designated as type. There is further one slide (no. 146/28) on which "Vallombrosa" (also in the mountains of Tuscany) is recorded as locality. In their present state, two slides (nos. 80/9 and 146/28) are not suited for study. No. 80/10 is, however, in a satisfactory condition; it fits in with the description of specimens from the Vosges (Grandjean, 1928). I draw attention to the fact that eyes are distinctly visible in this type-specimen, so that it is certain that Berlese (who did not raention it) overlooked this unique character. 1) In the explanation of the plate, Berlese spells the subgeneric name as Heterocthonius .