Abstract
A new species, Hypogastrura ellisi, from Iran and Greece is described. It does not fit the definition of any known species group, but, as it has weakly differentiated blunt Ant. IV sensilla, one tenent hair on tibiotarsi, broad empodial lamellae, and dens with fine granulation and seven setae, it can be compared with some members of the trybomi and monticola groups and H. aterrima Yosii, 1972. It seems to be especially close to a representative of the trybomi group, H. tethyca Ellis, 1976. They differ mainly in the shape of apical papillae on the labrum, the size of anal spines, and the presence of setae m2 on Th. II. Notes on H. tethyca, the trybomi group, and a key to the species of the group are given.
Highlights
Hypogastrura Bourlet, 1839 currently comprising 168 species (Bellinger et al 1996‒2017), is the most speciose genus within the family Hypogastruridae
Studies on the type material of this species made it possible to ascertain that the Iranian specimens represented a new species that does not fit the definition of any known species group
The trybomi group was created by Christiansen and Bellinger (1980) for five Nearctic species: H. irenae (Wray, 1953), H. lima Christiansen & Bellinger, 1980, H. maynardi Christiansen & Bellinger, 1980, H. oregonensis Yosii, 1960, and H. trybomi
Summary
Hypogastrura Bourlet, 1839 currently comprising 168 species (Bellinger et al 1996‒2017), is the most speciose genus within the family Hypogastruridae. Nine groups are used in the taxonomy of the genus: crassaegranulata, manubrialis, monticola, nivicola, packardi, sahlbergi, socialis, trybomi, and viatica. This group system is not complete; numerous species do not belong to any of these groups due to their specific morphology or poor knowledge on their morphology. In the material collected in Iran, several specimens that resemble Hypogastrura tethyca Ellis, 1976, a member of the trybomi group, were found. Notes on H. tethyca and the trybomi group as a whole, as well as a key to all known species of the group are given below
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