Crassabwa ? vitrea (Navás 1930)

(Figs 133–134).

Cloeon vitreum Navás 1930: 322 (♀ imago);

Centroptilum vitreum: Demoulin 1957: 262 (♀ imago); Afroptilum vitreum: Gillies 1990: 99;

Crassabwa vitrea: Lugo-Ortiz & McCafferty 1996b: 239 .

Cloeon vitreum Navás 1930 was described as a single female imago from Belgian Congo. Demoulin (1957) redescribed the holotype and placed it to Centroptilum, noting its similarity with Centroptilum flavum Crass 1947 . Based on this, Gillies (1990) placed this species to the group tarsale of the genus Afroptilum, and Lugo-Ortiz & McCafferty (1996b) placed it to the newly established genus Crassabwa . The single specimen has no legs and cerci, so their structure and coloration are unknown (Demoulin 1957). Shape of wings (Demoulin 1957: Fig. 3) is in agreement with characteristic of Crassabwa [see characters (20), (21)], but this is not enough to determine its systematic position for certain.

Demoulin (1957) reported that coloration of C. vitreum is somewhat different from that of C. flavum . The holotype of vitreum Navás 1930 [ Cloeon] is deposited in the «Musée royal de l’Afrique centrale» in Tervuren, Belgium. Photographs of the holotype, kindly made by specialists of this museum, allow to conclude that vitreum [ Cloeon] differs from Crassabwa flava and C. ludmilae sp. n. by unicolor dark brown dorsal surface of female head (Fig. 133) (which in C. flava and C. ludmilae is light ocher with brownish—Figs 33, 96) and by unicolor abdomen (Fig. 134) (which in C. flava, C. ludmilae sp. n. and C. ameliae sp. n. has sterna contrastingly lighter than terga—Figs 34, 97, 120).