Cloeon, Leach, 1815

Kluge, Nikita, 2022, Two new species of Waynokiops Hill et al. 2010 (Ephemeroptera: Baetidae) from the Oriental Region, Zootaxa 5182 (1), pp. 41-63 : 43-44

The following characters are autapomorphies of Cloeon /fg1:

(7) distal (3rd) segment of labial palp is widened distally and truncate;

(14) posterior abdominal segments with denticles on lateral margins;

(15) tergalii with additional dorsal lamella;

(17) posterior margin of each 4th segment of cercus and paracercus darkened and bears enlarged denticles;

(21) gonovectes fused with penial bridge (the same in some other taxa);

(22) gonostyli with 2nd segment widened at apex, 3rd segment small and petiolate.

The following characters are plesiomorphies present in all Cloeon /fg1 and some other taxa:

(4) maxilla with all three canines and three dentisetae long, slender and bent in the same direction;

(6) labium with glossae and paraglossae of equal width;

(11) larval claw symmetric, with two equal rows of denticles;

(16) cerci and paracercus equally long, with rows of primary swimming setae on inners sides of cerci and outer sides of paracercus, without secondary swimming setae on lateral sides of cerci;

(19) subimaginal gonostyli bent under larval cuticle in the « Cloeon - type » pose;

(20) sterno-styligeral muscle retained.