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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Haemonais

Haemonais Bretscher, 1900 (ref. ID; 3692, 7854)

Family Naididae (ref. ID; 5939, 7854)

Family Naididae: Subfamily Naidinae (ref. ID; 6648)

ref. ID; 1663

Hair setae present. Some capilliform setae in dorsal bundles. Dorsal setae beginning behind II. Dorsal setae shed anteriorly after budding. Retained form about XVIII. (ref. ID; 1663)
  1. Haemonais laurentii Stephenson, 1915 (ref. ID; 6972)
  2. Haemonais waldvogeli Bretscher, 1900 (ref. ID; 3692, 6648, 7854) reported year? (ref. ID; 1663) reported author and year? (ref. ID; 5939)

Haemonais waldvogeli Bretscher, 1900 (ref. ID; 3692, 6648, 7854) reported year? (ref. ID; 1663) reported author and year? (ref. ID; 5939)

Descriptions

In fixed state, body 5.2 mm long, maximally 0.3 mm wide, segments 32. No eyes. Dorsal chaetal bundles beginning in XIV, each consisting of one short (110-142 um long), smooth hair and one curved, bifurcate crotchet. Dorsal crotchets 92-104 um long, with nodulus distally and with long teeth; upper tooth much longer and as thick as or a little thinner than lower. Ventral chaetae all bifurcate; those in anterior segments 2-3 per bundle, 90-98 um long, with nodulus medially to proximally, upper tooth longer and thinner than lower; those in middle and posterior segments 2-3 per bundle, 76-84 um long, becoming a little thicker than in anterior segments, with nodulus distally and with upper tooth shorter and much thinner than lower. (ref. ID; 6648)

Remarks

All chaetal characteristics found in the present specimen coincide well with those in the previous descriptions. This is the first recorded occurrence of this species in Japan. (ref. ID; 6648)

Material examined

One immature individual, off Hayasaki (the northern lake), 10 m depth, sand, 26th February, 1993). (ref. ID; 6648)