Download karyorelictea

CLASS KARYORELICTEA
Corliss, 1974
Long, vermiform, flattened; many genera have one barren surface; extremely contractile, except
Loxodida; two to many macronuclei contain approximately (sometimes slightly more than) the diploid
amount of DNA; macronuclei form by division of micronuclei, then differentiate; the micronuclei divide,
apparently by eumitosis; three orders.
ORDER PROTOSTOMATIDA Small & Lynn, 1985
The "ventral," ingestive surface is unciliated and may have attached symbiotic bacteria on that naked
surface; (from marine or estuarine interstitial habitats; two families.
FAMILY KENTROPHORIDAE Jankowski, 1980
No permanent cytostome; ingestion through naked "ventral" surface; some genera with circumoral
ciliature and brosse kineties; five genera.
FAMILY TRACHELOCERCIDAE Kent, 1881
Ingestive area apical; no obvious permanent cytostome; single genus.
ORDER LOXODIDA Jankowski, 1980
Flattened body; somatic cilia mainly on right surface, which is bounded by a dorsal kinety; left surface
barren except for single marginal kinety; oral cilia as simple dikinetids around oral area, some extending
along walls of oral cavity; two families.
FAMILY LOXODIDAE Bütschli, 1889
Size very small to very large; body long, flat, with beak-like anterior rostrum; oral area in long ventral
groove behind rostrum; oral cilia usually as dikinetids along sides of oral area with right paroral a long
internal oral dikinetid file, anterior left file of dikinetids, and inverted left oral dikinetid file; Müllerian
vesicles in endoplasm; two genera.
FAMILY CRYPTOPHARYNGIDAE Jankowski, 1980
Body ovoid, flat, non-contractile, dorsoventral margin often serrate; circular to ovoid oral region ringed by
inner and outer dikinetid files and with internal oral dikinetid file; two genera.
ORDER PROTOHETEROTRICHIDA Nouzarède, 1977
Holotrichous; cytostomal area ventral with elaborate oral ciliature, which may include a series of
transverse monokinetid rows; body highly contractile; often pigmented, appearing black in transmitted
microscopic light; in marine or brackish coastal sands, gravels; one family.
FAMILY GELEIIDAE Kahl, 1933
With the characters of the order; two genera.
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