TY - JOUR
TI - Allovahlkampfia minuta nov. sp., (Acrasidae, Heterolobosea, Excavata) a New Soil Amoeba at the Boundary of the Acrasid Cellular Slime Moulds
AU - De Obeso Fernadez Del Valle, Alvaro
AU - Maciver, Sutherland K.
TI - Allovahlkampfia minuta nov. sp., (Acrasidae, Heterolobosea, Excavata) a New Soil Amoeba at the Boundary of the Acrasid Cellular Slime Moulds
AB - We report the isolation of a new species of Allovahlkampfia, a small cyst-forming heterolobosean soil amoeba. Phylogenetic analysis of the 18S rDNA and the internal transcribed spacers indicates that Allovahlkampfia is more closely related to the acrasids than to other heterolobosean groups and indicates that the new strain (GF1) groups with Allovahlkampfia tibetiensis and A. nederlandiensis despite being significantly smaller than these and any other described Allovahlkampfia species. GF1 forms aggregated cyst masses similar to the early stages of Acrasis sorocarp development, in agreement with the view that it shares ancestry with the acrasids. Time-lapse video microscopy reveals that trophozoites are attracted to individuals that have already begun to encyst or that have formed cysts. Although some members of the genus are known to be pathogenic the strain GF1 does not grow above 28oC nor at elevated osmotic conditions, indicating that it is unlikely to be a pathogen. 
VL - 2017
IS - Volume 56, Issue 3
PY - 2017
SN - 0065-1583
C1 - 1689-0027
SP - 181
EP - 189
DO - 10.4467/16890027AP.17.016.7497
UR - https://ejournals.eu/en/journal/acta-protozoologica/article/allovahlkampfia-minuta-nov-sp-acrasidae-heterolobosea-excavata-a-new-soil-amoeba-at-the-boundary-of-the-acrasid-cellular-slime-moulds