Black Corals (Anthozoa: Antipatharia) from the Southwestern Atlantic Author Lima, Manuela M. Author Cordeiro, Ralf T. S. Author Perez, Carlos D. text Zootaxa 2019 2019-11-05 4692 1 1 67 journal article 24975 10.11646/zootaxa.4692.1.1 ead7ec31-b9d4-49f3-a006-a67fff6ad623 1175-5326 3528942 F054DC68-6A7E-4C80-9094-8ECCA4502CD6 Family Leiopathidae Haeckel, 1896 Diagnosis. “Polyps with six primary and six secondary mesenteries. Primary (pm) and secondary mesenteries (sm) complete, attached to both inner wall of oral cone and actinopharynx. Secondary mesenteries located between transverse primary mesenteries (tpm) and sagittal primary mesenteries (spm); two on one side and four on opposite side of transverse axis, with one-half of each complement occurring on each side of sagittal axis; clockwise pattern described by sequence tpm-sm-spm-spm-sm-tpm-sm-sm-spm-spm-sm-sm. New polyps developing from coenenchymal surface between older polyps, as well as at distal end of branchlets” ( Opresko, 1998 ).