The genera Demoulinia Gillies and Potamocloeon Gillies (Ephemeroptera: Baetidae) in Madagascar Author Gat, J. - L. text Zootaxa 2003 184 1 18 journal article 10.5281/zenodo.157014 6d0279a2-1288-47b4-8f52-5d73589565b3 1175­5326 157014 2.2 Potamocloeon spB Larva Unknown. FIGURES 19­23. Larval structures of Potamocloeon spA: 19: in toto (dorsal view). 20: foreleg. 21: proximal part of tibia. 22: third gill. 23: seventh gill. Male imago Maximal length: Forewing 3.9 mm , hindwing 0.5 mm . Head: Turbinate eyes honey­brown, with circular dark brown stripes. Thorax: Forewing ( Fig. 24 ) hyaline without cross­veins in the cubital area; pterostigma with 2 to 4 cross­veins that generally do not reach the subcostal vein. Hindwing ( Fig. 25 ) hyaline, slender with 2 distinct longitudinal veins, not joined at the base; one single long acute spur on the costal margin. Genitalia with 3­segmented gonopods; presence of a sclerotized plate between the gonopods ( Fig. 26 ); basal segment with the inner apical angle only slightly produced; inner margin of first segment dilated and rounded apically; second segment clearly dilated apically; third segment longer than broad, obliquely truncated. FIGURES 24­26. Male imaginal structures of Potamocloeon spB: 24: forewing. 25: hindwing. 26: genitalia. Material examined One male imago P0405, Madagascar , Costal basin between F­Dauphin/Manampanihy, Antorendrika riv., Loc. Belavenoka, Long. 47°05'02" E , Lat. 24°50'18" S , Alt. 20 m , 23.4.1995 . J.­M. Elouard and T. Pilaka. One male imago P0528, Madagascar , Manampanihy bas., Manampanihy riv., Loc. Enosiary, Long. 46°49'19" E , Lat. 24°40'37" S , Alt. 100 m , 22.11.1995 . T. Pilaka.