Redescription of the subgenus Securiops Jacobus, McCafferty & Gattolliat 2006 (Ephemeroptera, Baetidae, Procloeon Bengtsson 1915) Author Kluge, Nikita J. text Zootaxa 2023 2023-09-08 5343 3 243 272 http://dx.doi.org/10.11646/zootaxa.5343.3.2 journal article 10.11646/zootaxa.5343.3.2 1175-5326 8334181 BB852CA9-6C6E-4016-9972-AAF2C378E41F Character of Procloeon s. l. , or Procloeon/g1: Larval cerci . In distal part of larval cercus, each cercomere bears one greatly enlarged spine on lateral side of its posterior margin; these spines form a regular row on lateral side of cercus (autapomorphy of Procloeon s. l. ) ( Figs 72 , 105 , 125 ).