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The Morphology and Division of Hexamita gigas n.sp. (Flagellata)1

  • Ann Bishop (a1)

A Previous paper (Bishop, 1932) dealt with the cultivation of a Hexamita sp. found in the horse-leech (Haemopis sanguisugae = Aulastomum gulo). The present paper deals with the morphology and method of division of the Hexamita above referred to, which I now name H. gigas n.sp. Dobell (1909) gave a detailed history of the nomenclature of the genus, and Wenyon (1926) has dealt with the same subject and given a list of the then known species and their hosts. Two species have since been described: H. pulcher, by Becker (1926), from the caecum of the ground squirrel Citellus tridecemlineatus, and Octomitus (= Hexamita) pitheci described and figured by da Cunha and Muniz (1928) from the intestine of Macacus rhesus. Apart from the two species (Hexamita nodulosa and H. inflate) described by Dujardin (1841) from stagnant water, and in which he saw but six flagella, a single species only has been described hitherto from a non-vertebrate host. This species, Octomitus (= Hexamita) periplanetae, a small flagellate 5–8 μ in length, from the gut of the cockroach, was described by Bělař (1916); a similar flagellate from the gut of Blatta orientalis has been found by me.

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Alexeieff, A. (1908). Sur la division de Hexamitus intestinalis Dujardin. C.B. Soc. Biol. 65, 402.
Beckbe, E. R. (1926). The flagellate fauna of the caecum of the striped ground squirrel, Citdlus tridecemlineatus, with special reference to Chilomastix magna sp.nov. Biol. Bull. 51, 287.
Bělař, K. (1916). Protozoenstudien II. Arch. Protistenk. 36, 241.
Bishop, A. (1932). Entamoeba aulastomi Noller. Cultivation, morphology, and method of division; and cultivation of Hexamita sp. Parasitol. 24, 225.
Bishop, A. (1932 a). A note upon Retortamonas rotunda n.sp., an intestinal flagellate in Bufo vulgaris. Parasitol. 24, 233.
Da Cunha, A. M. and Muniz, J. (1928). Nota sobre os parasitas intestinaes do Macacus rhesus com a descripçaó de uma nova especie de Octomitus. Mem. Inst. O. Cruz, Suppl. 5, 34.
Dobell, C. C. (1909). Researches on the intestinal Protozoa of frogs and toads. Quart. J. Microsc. Sci. 53, 201.
Dujardin, F. (1841). Histoire naturelle des Zoophytes. Infusoires. Paris.
Reichenow, E. (1928). Ergebnisse mit der Nuclealfärbung bei Protozoen. Arch. Protistenk. 61, 144.
Robertson, M. (1927). Notes on certain points in the cytology of Trypanosoma raiae and Bodo caudatus. Parasitol. 19, 375.
Swezy, O. (1915). Binary and multiple fission in Hexamitus. Univ. Calif. Pub. Zool. 16, 71.
Wenyon, C. M. (1907). Observations on the Protozoa in the intestine of mice. Arch. Protistenk. Suppl. 1, 169.
Wenyon, C. M. (1926). Protozoology. London.
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  • ISSN: 0031-1820
  • EISSN: 1469-8161
  • URL: /core/journals/parasitology
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