Locus typicus: Quarry near Donaueschingen, Germany.
Reported for Mediterranean Sea: Italy, Venice lagoon; Baltic sea and in continental water: Germany, Italy, Danube, Austria, Ireland.
Food: small diatoms.
In limno- and potamopsammon, in algal films; mainly in the cold seasons. Marine and freshwater species.
Body vasiform in dorsal view; semiloricate; transparent. Body cavity with 4 symmetrically placed, spherical accumulations of light-refracting bodies. Head offset by neck-fold, quadratic. Trunk elliptical, dorsally arched, ventrally flattened; longitudinal folds laterally. Head and foot retractable in trunk. Foot long, c. 1/4-1/5 total length, slender, 2-3 pseudosegments, terminal pseudosegment longest. Toes long, slender, lanceolate. Corona simple, almost frontal, ciliary tuft above mouth. two frontal, red eyespots, sometimes fused; crystalline body present or not. No constriction between stomach and intestine. Gastric glands very large, rounded. pedal glands elongate, extending into trunk. Mastax very large. Incus small. Rami triangular, lateral ± blunt alulae. Fulcrum very short, rod-shaped in ventral view. Unci with one principal and 4 subsidiary teeth; ventral edge of principal tooth with blunt prominence. Manubria long, slightly asymmetrical, incurved posteriorly, short posterior and longer anterior lamella.
Length 130-200 µm, toe 21-25 µm;trophi 21-23 µm: fulcrum 5 µm, left manubrium 7 µm, right manubrium 15-17 µm, uncus 8-9 µm; spherical accumulation of light-refracting bodies up to 1.6 µm.
Proales globulifera is een raderdiertjessoort uit de familie Proalidae. De wetenschappelijke naam van deze soort is voor het eerst geldig gepubliceerd in 1921 door Hauer.[1]
Bronnen, noten en/of referenties
