in chigger mites of talmiensis
species group, genus Neotrombicula
Hirst, 1925 (Acari, Trombiculidae) in areas of sympatria on the Western
obozrenie, 81(3): 761-777 (2002) (In Russian, English summary).
S U M M A R Y
Variability of morphometric features and
host specificity has been studied in three closely related species:
Stekolnikov, 2001, N. sympatrica Stekolnikov,
N. carpathica Schluger et
Vysotzkaya, 1970. Eco-geographical rules has been revealed in
N. pontica and N.
sympatrica. Scutal width and length, and also relative
distance between the base of mastitarsala and base of leg III tarsus (m-t), show strong and
significant positive correlations with an altitude above sea level. In
N. sympatrica number of idiosomal
setae (NDV) is also correlated with an altitude.
N. sympatrica nearly not
occured on voles of the subgenus Microtus (Terricola)
in localities where sympatria of
N. sympatrica and N.
pontica been reported. This species parasitizes there only
mice of the genus
Apodemus. While in other
localities, no host specificity of N. sympatrica to
Apodemus is found. N.
pontica and N. carpathica parasitize the
both genera of hosts, but on
Microtus these species are some
The pattern of distances between samples,
constructed by multidimensional scaling, has been considered from the
view of probable diagnostic problems in
talmiensis group. N.
talmiensis is the smallest species in the group. Therefore,
the main problem in the systematics of
talmiensis group is a
distinguishing of small ecogeographical forms of other species from the
nominative one. Probable areas of species distribution are described.
N. carpathica appear to be
southern European species, while N. sympatrica is
asiatic one. The Main Caucasus Range is a natural barrier between
N. pontica is probably western
Caucasian species, inhabiting mountain mesophillous forests and
isolated patchs of forest in flood-lands.