-parasitic nematode Xiphinema americanum (Brown et al ., 2015 ). Although a functional role was not determined, Baquiran et al . ( 2013 ) noted that bacteria belonging to Ochrobactrum and Pedobacter inhabited the gut of the bacterivorous species Acrobeloides maximus . Although molecular characterisation
SPECIES We used 13 species of free-living nematodes from three families (Fig. 1): Cephalobidae ( Acrobeloides maximus and A. nanus ), Panagrolaimidae ( Panagrolaimus redi- vivus and P. rigidus ) and Rhabditidae ( Caenorhabditisel- egans , C. sp. PS1010, Oscheius dolichuroides , O. myrio- phila , Oscheius
uncertain identity, matching the morphology of several cryptic species in the Acrobeloides bodenheimeri species complex (see De Ley et al. , 1999). PDL0033 is a strain that morphologically resembles A. bodenheimeri without being completely identical. Comparison of tree topology and branch lengths with lip
generation time of 40-44 hrs at 35° is one of the shortest generation times reported for free- living nematodes. A generation time of 7-8 days was reported for Acrobeloide.r buet.rchli at 30° by Nicholas ( 1962) and a generation time of 5-6 days was reported for Panagrellus redivivus at 25 ° by Cryan et al
Acrobeloides nanus could tolerate desiccation at 4 and 20°C but could not do so at −17 or 60°C (Nicholas & Stewart, 1989). The entomopathogenic nematodes Steinernema feltiae showed higher tolerance to osmotic desiccation at 5 than at 35°C, whereas the effects of storage temperature on desiccation tolerance
above using all known named species as well as environmental samples deposited in GenBank. For the default substitution model we selected GTR with G + I, which had the smallest AIC based on model selection in MEGA. Acrobeloides maximus (Thorne, 1925) (EU196016) was used as an outgroup. The reliability
resulting perimeter files were inspected for chain convergence in Tracer 1.4 (Rambaut & Drummond, 2007 ). The SSU tree was rooted using sequences of Rhabditis myriophila Poinar, 1986 and the Hsp90 tree was rooted using sequences of Acrobeloides amurensis Truskova, 1971 and Cephalobus cubaensis
. II. Influence of the initial food level on the population dynamics of Acrobeloides nanus (De Man, 1880) Anderson, 1968 and Doliochorhabditis dolichura (Schneider, 1866) Andrassy, 1983 .
Polish Journal of Ecology
123 - 135 .
( Ulmus sp . ) (Nesterov, 1970; Gebre, unpubl.). Acromoldavicus was created by Nesterov (1970) to accommodate what was previously described as Acrobeloides skrjabini Nesterov & Lisetskaya, 1965, which is the only described species of the genus. * Corresponding author, e-mail: email@example.com The lip