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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Paratrilobus

Paratrilobus Micoletzky, 1922 (ref. ID; 3570)

Order Enoplida Filijev, 1929: Family Tripylidae De Man, 1876: Subfamily Tobrilinae De Coninck, 1965 (Filipjev, 1918) (ref. ID; 3570)

Order Enoplida: Family Tobrilidae (ref. ID; 7912)

ref. ID; 3570

Type species

Trilobus grandipapilloides Micoletzky, 1922 (ref. ID; 3570)
  1. Paratrilobus expugnator (Tsalolichin, 1976) (ref. ID; 7912)
  2. Paratrilobus grandipapilloides (Micoletzky, 1922) (ref. ID; 3570, 7912)
    Syn; Trilobus grandipapilloides Micoletzky, 1922 (ref. ID; 3570)
  3. Paratrilobus rapis Gagarin, 1991 (ref. ID; 7912 original paper)

Paratrilobus rapis Gagarin, 1991 (ref. ID; 7912 original paper)

Diagnosis

The species is close to P. grandipapilloides Micol., 1922 and P. expugnator (Tsalolichin, 1976). It differs from the first species in its larger body size and longer head setae (in P. grandipapilloides, length of longest setae 15-18 µm, which is 20 percent of head width). From the latter species, it differs in its shorter tail. In P. expugnator, the tail is long, its terminal end is threadlike. (ref. ID; 7912)

Descriptions

Large worms with small ringed cuticle. Somatic setae numerous, especially in trophic-sensory and caudal parts. Width of head 63 and 68 µm; vestibulum low. Length of large head setae 28 and 30 µm (44 percent of head width), small setae 18 µm. Buccal cavity large, pockets of stoma fused with buccal cavity. Onchia (hooks) large, positioned at base of buccal cavity. Openings of amfids located at level of middle of buccal cavity or slightly lower. Cordial glands well developed, rounded. Eggs 177-2110x105-123 µm in size, in pairs in uterus. Tail length 385 and 420 µm, in first one-third, it narrows drastically, then threadlike. Caudal glands and spinneret well developed. Subterminal seta absent. (ref. ID; 7912)

Examined materials

Two (female, female) found in Lake Taimyr, VIII.1988 (depth 10 m, substrate-slit). Holotype (female) (preparation "Taimyr-10"): L=5030 µm, a=28.60, b=4.40, c=13.31, b=4.40, c=11.00, V=54.87 percent, c'=4.23. (ref. ID; 7912)

Type specimens

Type specimens are deposited in the collection of the Laboratory of Biology and Systematics of Aquatic Invertebrates of the Institute of Biology of Inland Water Bodies of the Academy of Sicences of the USSR, Borsk. (ref. ID; 7912)