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Revision of the Recent species of Exechonella Canu & Bassler in Duvergier, 1924 and Actisecos Canu & Bassler, 1927 (Bryozoa, Cheilostomata): systematics, biogeography and evolutionary trends in skeletal morphology
Cáceres-Chamizo, J.P.; Sanner, J.; Tilbrook, K.J.; Ostrovsky, A.N. (2017). Revision of the Recent species of Exechonella Canu & Bassler in Duvergier, 1924 and Actisecos Canu & Bassler, 1927 (Bryozoa, Cheilostomata): systematics, biogeography and evolutionary trends in skeletal morphology. Zootaxa 4305(1): 1-79. https://hdl.handle.net/10.11646/zootaxa.4305.1.1
In: Zootaxa. Magnolia Press: Auckland. ISSN 1175-5326; e-ISSN 1175-5334, more
Peer reviewed article  

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Keywords
    Biological phenomena > Evolution
    Bryozoa
    Geography > Biogeography
    Systematics
    Taxa > Species > New taxa > New species
    Actisecidae Harmer, 1957 [WoRMS]; Actisecos Canu & Bassler, 1927 [WoRMS]; Cheilostomata [WoRMS]; Exechonella Canu & Bassler in Duvergier, 1924 [WoRMS]; Exechonellidae Harmer, 1957 [WoRMS]

Authors  Top 
  • Cáceres-Chamizo, J.P.
  • Sanner, J.
  • Tilbrook, K.J.
  • Ostrovsky, A.N.

Abstract
    The present study describes species of Exechonella and Actisecos discovered through the examination of recent collections from the Red Sea, coast of Oman and Maldive Islands (Indian Ocean) and the Lizard Island, Australia (Great Barrier Reef, Coral Sea) in comparison with historical collections. Eight species of Exechonella are redescribed: E. grandis (type species), E. ampullacea, E. antillea, E. brasiliensis, E. erinacea, E. pumicosa, E. spinosa and E. verrucosa. Eighteen new species of Exechonella are also described: E. azeezi n. sp., E. catalinae n. sp., E. californiensis n. sp., E. claereboudti n. sp., E. elegantissima n. sp., E. floridiana n. sp., E. harmelini n. sp., E. kleemanni n. sp., E. maldiviensis n. sp., E. nikitai n. sp., E. panamensis n. sp., E. reniporosa n. sp., E. rimopora n. sp., E. safagaensis n. sp., E. similis n. sp., E. variperforata n. sp., E. vavrai n. sp. and E. vieirai n. sp. The species studied were grouped in five species complexes. Additionally, two species from the genus ActisecosA. regularis and A. discoidea were redescribed. The current revision highlights a number of important taxonomical, biogeographical and morphological questions that are of the general biological interest. Among thеm is a polyphyletic nature of Cheilostomata possessing umbonuloid frontal shield.

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