Summary
Description ofNyctotherus parasite ofPeriplaneta americana found in Gôa. Detailed description of some organels, as the caryophore diaphragm with its frontal lamina as well as of the neuromotor apparatus attached as an appendix to the cytopharynx and the fibrillæ in the lumen of the cytopharynx. Confirmation of the existence of sub-pharyngeal canal as described by Higgins inN. cordiformis. Divisional stages with mitosis of micronucleus preceded by premitotic phenomena consisting of a reduction of the caryosome to nuclear dust, formation of centriole and rudimentary diaster. Four chromosomes stated. Amitosis of macronucleus. Three morphological types: (a) micronucleus separate from macronucleus, anal groove simple; (b) micronucleus embedded in the mass of macronucleus, anal groove with one border mamilonated; (c) transitional type with nuclear apparatus as in (a) and anal groove as in (b). All these types are variations of one single species,N. ovalis Leidy.
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Froilano de Mello, I., Carvalho, J.I. & Gaitondó, P. Cytological studies onNyctotherus ovalis with special reference to its morphological types. Proc. Indian Acad. Sci. 1, 249–257 (1934). https://doi.org/10.1007/BF03039744
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DOI: https://doi.org/10.1007/BF03039744