Schrankiana		Contents		Rev: 11/08/2024
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Schrankiana Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Atractidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

Chromadoria

Rhabditida

Spirurina

Cosmocercoidea

Atractidae

                          Schrankiana (Travassos, 1925) Strand, 1942

    Synonyms:

Schrankia Travassos, 1925

Schranknema Travassos, 1949

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Morphology and Anatomy:

Species of the genus Schrankiana are distinguished by:

•  esophageal shape (divided into three parts: muscular corpus, short isthmus and well-developed posterior bulb with valves)
• cephalic morphology, numbers and sizes of papillae on lips
• lengths of the of the lateral alae,
• location of the vulva,
• size of the vagina,
•  male caudal features (e.g. papillae and spicules)

Ref: Baker and Vaucher 1988

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Distribution:

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Feeding:

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Biology and Ecology:

Species of the genus Schrankiana are generally described from anurans (frogs and toads). Seven of 8 species have been described from South American frog hosts of the genus Leptodactylus and one species from the Rococco toad, Rhinella schneideri. However, Baker and Vaucer, 1988 suggetsed that the latter was an accidental infecion of an unusual host.

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Life Cycle:

Parasitic atractid nematodes are found in amphibians, reptiles, mammals and fishes. In the family Atractidae, eggs hatch and larvae develop to the third stage within the uterus; these larvae autoinfect the host. Autoinfection is generally accompanied by high intensities with few large larvae. Transmission is unknown (Anderson 2000; Gonzalez and Hamann, 2014)

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Ecosystem Functions and Services:

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Management:

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References:

Copyright © 1999 by Howard Ferris.
Revised: November 08, 2024.