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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Alma

  1. Alma nilotica Grube (ref. ID; 6609) reported author and year? (ref. ID; 6024)
  2. Alma stuhlmanni (Mich.) (ref. ID; 6609)

Alma nilotica Grube (ref. ID; 6609) reported author and year? (ref. ID; 6024)

Descriptions

Circulatory apparatus: In addition to the dorsal and ventral vessels and the two latero-parietal vessels, there is a large supraoesophageal trunk -only slightly thinner than the dorsal vessel- arising in XVIII (?) from the intestinal sinus and running forward. No longitudinal vessels run along the nerve cord which instead is enveloped by a dense network of capillaries formed by branches arising in each segment from the latero-parietal vessels. The oesophageal hearts, each containing a single compartment, are six pairs located in VII-XII and each of them is connected with both the dorsal and supraoesophageal vessels, a pattern which resembles that of Megascolecidae; they are endowed at each end with powerful valves. Even the ventral vessel is endowed with valves in the anterior segments, a quite exceptional condition. This description differs in some details from the one by Jamieson and Ghabbour (1969). The intestinal sinus is similar to that of Drilocrius. (ref. ID; 6024)