Translator Disclaimer
1 July 2004 Calyxocephalus karyopera g. nov., sp. nov. (Eugregarinorida: Actinocephalidae: Actinocephalinae) from the Ebony Jewelwing Damselfly Calopteryx maculata (Zygoptera: Calopterygidae) in Southeast Nebraska, U.S.A.: Implications for Mechanical Prey–Vector Stabilization of Exogenous Gregarine Development
Author Affiliations +
Abstract

Calyxocephalus karyopera g. nov., sp. nov. (Apicomplexa: Eugregarinorida: Actinocephalidae: Actinocephalinae) is described from the Ebony Jewelwing Damselfly Calopteryx maculata (Odonata: Zygoptera: Calopteryigidae) collected along Turkey Creek in Johnson County, Nebraska, U.S.A. Calyxocephalus gen. n. is distinguished by the form of the epimerite complex: a terminal thick disk or linearly crateriform sucker with a distal apopetalus calyx of petaloid lobes and a short intercalating diamerite (less than half of the total holdfast length). The epimerite complex is conspicuous until association and syzygy. Association occurs immediately before syzygy and is cephalolateral and biassociative. Gametocysts are spherical with a conspicuous hyaline coat. Lacking conspicuous sporoducts they dehisce by simple rupture. Oocysts are axially symmetric, hexagonal dipyramidic in shape with slight polar truncations, bearing 6 equatorial spines, 1 at each equatorial vertex and 6 terminal spines obliquely inserted at each pole, 1 at each vertex created by polar truncation. The ecology of the C. karyoperaC. maculata host–parasite system provides a mechanism for mechanical prey–vector stabilization of exogenous gregarine development and isolation.

Richard E. Clopton "Calyxocephalus karyopera g. nov., sp. nov. (Eugregarinorida: Actinocephalidae: Actinocephalinae) from the Ebony Jewelwing Damselfly Calopteryx maculata (Zygoptera: Calopterygidae) in Southeast Nebraska, U.S.A.: Implications for Mechanical Prey–Vector Stabilization of Exogenous Gregarine Development," Comparative Parasitology 71(2), (1 July 2004). https://doi.org/10.1654/4147
Published: 1 July 2004
JOURNAL ARTICLE
13 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top