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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Sathodrilus

Family Cambarincolidae (ref. ID; 6651)
  1. Sathodrilus attenuatus Holt, 1981 (ref. ID; 6651)
  2. Sathodrilus chehalisae Holt, 1981 (ref. ID; 6651)
  3. Sathodrilus dorfus Holt, 1977 (ref. ID; 6651)
  4. Sathodrilus inversus (Ellis, 1920) (ref. ID; 6651)
  5. Sathodrilus lobatus Holt, 1977 (ref. ID; 6651)
  6. Sathodrilus norbyi Holt, 1977 (ref. ID; 6651)
  7. Sathodrilus prostates Holt, 1973 (ref. ID; 6651)
  8. Sathodrilus shastae Holt, 1981 (ref. ID; 6651) reported author and year? (ref. ID; 6466)
  9. Sathodrilus veracruzicus Holt, 1968 (ref. ID; 6651)
  10. Sathodrilus villalobosi Holt, 1981 (ref. ID; 6651)
  11. Sathodrilus wardinus Holt, 1981 (ref. ID; 6651)

Sathodrilus shastae Holt, 1981 (ref. ID; 6651) reported author and year? (ref. ID; 6466)

Descriptions

The acrosome is long. The acrosome tube has a twisted anterior portion with an external ridge on its crest, then the rest of the tube is straight. The posterior end of the tube has a short, inward-tapering limen. The acrosome vesicle protrudes slightly at its anterior extremity and the covering plasma membrane supports a sparse, disorganized apical corona. The vesicle passes posteriorly to end in a thickened ring next to the limen. An invagination protrudes through the posterior ring of the vesicle and extends to the middle of the anterior twisted portion of the acrosome, thus forming the subacrosomal space. The space is filled with amorphous, electron-dense material, but does not contain a rod. The nucleus is straight with a deep conical indentation on the anterior surface and a shallower one on the posterior surface. The midpiece is long and the central tubules of the axoneme hardly penetrate among the mitochondria. The flagellum has a narrow electron-dense cylinder around its base and a prominent central-sheath axoneme. Around the tail is coiled a tall, thin helical marginal fiber that starts just after the dense cylinder. The pitch of the marginal fiber is so long that it appears to be almost parallel to the major axis of the flagellum. (ref. ID; 6466)