A New Iranian Species Of The Subgenus Labidostoma (Prostigmata: Labidostomatidae), With New Biogeographic Data On The Integrum Species Group Author Bertrand, M. Author Bagheri, M. Author Akbari, A. Author Yazdanian, M. Author Irani-Nejad, K. H. Author Mohajer, S. S. Author Saboori, A. text Acarologia 2012 2012-06-27 52 3 233 245 http://dx.doi.org/10.1051/acarologia/20122042 journal article 7356 10.1051/acarologia/20122042 1bbcbc7b-56d5-4f1e-b8e9-cb5760c07aae 2107-7207 4639918 The genus Labidostoma and the subgenus Labidostoma ( Labidostoma ) Berlese (1911) described the species type Labidostoma integrum from Umbria ( Italy ) in a brief diagnosis (less than 40 words) : " Flavidum, ovale; angulis non in cornua productis; mandibulorum digito mobili dentibus (in medio margine dentario) numero novem, intersese statura subequalibus, sat magnis; digiti fixi ramo apicali superno sat inferiorem securiformem superanti. Tuberculus mandibulae parvulus." TABLE 1: Labidostomatidae : the genera following Bertrand (1990), actualized.

Genera ( Berlese, 1911 ; Bertrand 1990; Feider & Vasiliu 1969 , 1970 ; Robaux, 1977)
Genera	Subgenera	Known distribution	Notable characters	Notes
Eunicolina Berlese, 1911		Northern Hemisphere	Neotaxy (gland like organs)	Included Feider & (Subfamily	Grandjeanellina Vasiliu 1969 Eunicolinae
according to F & V.).
Akrostomma Robaux, 1977		Northern Hemisphere	Euedaphic genus. Primitive famulus, eye reduction, sclerotized
Labidostoma	Kramer, 1879	Atyeonella	Southern Hemisphere	developed gland like organ
Labidostoma	Cosmopolitan	absence of cornua, spinelike famulus	Considered as the subfamily Nicoletiellinae by F & V
Nicoletiella	Cosmopolitan	presence of cornua, primitive famulus
Cornutella (included Mahunkiella )	Holartic ( Mahunkiella Asian)	= East	Famulus primitive, prolongated bases of proximal cheliceral setae
Pselistoma	South America. (A unique species described)		proroged anteriorly dorsal shield
Sellnickiella Feider & Vasiliu 1970		Sellnickiella	South Hemisphere	no gland like organ, simple or bifid famulus ( Sellnickiella or Dicastriella )	Considered as a subfamily by F & V: Sellnickiellinae
Dicastriella	South America

Berlese did not provide any details concerning the exceptional characteristic of this species: the line of dorso-lateral pores that distorts the alveolar arrangement. Fortunately, Grandjean (1942, a, b) examined some specimens and provided illustrations. He noted that Algerian and French specimens differed by: • ornamentation of the dorsal shield, • the number of teeth on the mobile cheliceral digit, • the organization of the terminal and subterminal teeth of the fixed digit. Feider and Vasiliu (1970) compared the morphology of Romanian specimens of L. caucasicum ( Reck 1940 ) and L. integrum to clarify their identity. Until now, amongst the species belonging to the subgenus Labidostoma , only two shared the unusual arrangement of a dorso-lateral line of pores: i.e. integrum and caucasicum . From 1879 to 1969, several authors described newly discovered species, named them in the genus Labidostoma (syn. Nicoletiella Kramer 1879 ). However, providing a different perspective from previous authors, Feider and Vasiliu (1969) and some years later, Bertrand (1990) considered that it is preferable to subdivide the genus into different subgenera. The subgenus Labidostoma , (comprising the species closely allied to L. integrum ) and the subgenus Nicoletiella , (comprising the species closely allied to L. luteum ) must keep separated from each other at least as subgenera if not as different genera.