Suborder (2) Cryptogemmina Jankowski, 1975

Syns.

Endogemmina, Dorsofragmina + Ventrofragmina

Internal budding, with up to eight tomites in brood pouch or crypt; body small, often flattened and angular, with reduced collar; spines common and of several types; stalk, of varying length, rypically present; macronuclear orthomere directed antapically; species occur solely on marine crustaceans, littoral and open ocean (amphipods, copepods, cyamids, nebaliids), including epibionts of whales.

[Although I used "Endogemmina Jankowski, 1972" in earlier papers (Corliss, 1975b, 1977a), I am endorsing Jankowski's (1975) own substituted name "Cryptogemmina" here because of its peculiar appropriateness.]

Body cylindrical, elongate; apical end conical, rather small and undistinguished; collar short; no spines; stalk sometimes long; crypt of moderate size; macronucleus ovoid; very wide distribution on appendages or shell of amphipods, nebalüds, cyamids, etc., including the "whale-lice" found on species of several genera of whales from various oceans.	Family ISOCHONIDAE Jankowski, 1973
Body small, usually flattened; apical end conical, not flattened, sometimes with a fold, and with conspicuous spines in some species; collar may be elongate; body wall often thickened; pedicel present, rather than stalk; crypt of varying size; macronucleus ovoid; marine, on nebalüds, with very wide distribution.	Family ACTINICHONIDAE Jankowski, 1973
Body leaf-like, markedly flattened dorsoventrally; apical end flattened, extending out laterally, with distinct folds and sometimes heavy spines; collar very short; body may have large, elongate spines or rows of papillae; crypt often very deep; macronucleus ovoid; stalk of varying length, sometimes unusually long (for chonotrichs); marine, on nebaliids.	Family STYLOCHONIDAE Mohr, 1948
Body rhombic or spindle-shaped, markedly flattened dorsoventrally; apical end flattened, flared widely, sometimes with fold or two; collar distinct, narrow, low; spines and papillae generally absent or indistinct; stalk quite long in some species; crypt very deep and broad; macronucleus somewhat elongate; marine, on nebaliids.	Family ECHINICHONIDAE Jankowski, 1973
Body sometimes elongate, small, flattened dorsoventrally; apical end very broad flattened, usually simple but occasionally with a few spines; collar distinct; very heavy, well-developed body spines in some species; exceedingly short pedicel present; crypt relatively shallow; macronucleus elongate; marine, on nebaliids, with wide distribution.	Family INVERSOCHONIDAE Jankowski, 1973