sp nov (rotatoria), (?new species of gall-forming rotifer)


21 Feb 2007 at OSGR: SD46 in West Lancs, England

Record SummaryIn galls on Vaucheria frigida
Found as
Date21 February 2007
Reared, cultured etc(Date may be unnatural as specimen was cultured, reared, grown or otherwise kept in captivity)
Associated organismVaucheria frigida
OS grid refOSGR: SD46
Lat/Lon54° 0’ N, 2° 50’ W
Vice CountyWest Lancs, VC no: 60
CountryEngland

Notes:

The galls commence as smooth green swellings containing a dark slowly-moving rotifer. As the gall grows, the points develop, first as smooth outgrowths, eventually as short parallel-sided tubes. When the gall is mature it loses chlorophyll, turns pale brown and the ends of the points open to form exit tubes for escape of the new generation.

Young green galls are generally stalked and clavate, whereas the older ones are sessile and spherical - maybe the filament grows on, or maybe this was a response to changing culture conditions?

Rotifers visible in galls, the mother being much blacker than the juveniles. Single rotifers also occasionally seen inside the filaments.

macro-photographs
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photomicrographs
photomicrographs:

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