CLADOENDESIS OF EPHEMEROPTERA

 zzz

Z 

Psammonella

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta  
Tetramerotarsata Liberevenata Turbanoculata
 Anteropatellata Cloeon/fg1 Procloeon/g1 Pseudocentroptiloides/g1 -Psammonella)

Nomen hierarchicum: Psammonella/g [g:1987]

In circumscription fits:

 subgenus Psammonella Glazaczow (in Jacob & Glazaczow) 1987


References.  Jacob & Glazaczow 1987:


Autapomorphies of Psammonella.

(1) Maxilla is modified as following: In addition to the transverse row of setae located laterad of canines [see Pseudocentroptiloides/g1 ()], it has a second transverse setal row formed by distal part of the inner-ventral longitudinal row, which is sharply bent in dorsal direction. All 3 canines are fused together forming a semicircular transverse ridge. Setae of each transverse row are stout, sharply bent and pressed one to another, so that in ventral or dorsal view these rows resemble two stout hooks, between which the shorter caninal ridge is located.

Characters of Psammonella of unclear phylogenetic status. 

(2) In all known species hind wings are absent [see Cloeon/fg1 (9)].

Variable characters of Psammonella. Tergalii either have dorsal lamella (in the species from Thailand), or not [see Cloeon/fg1 (5)].

Size. Fore wing length mm (see Tetramerotarsata).

Distribution. Holarctic and Oriental Regions.


Nominal species in Pseudocentroptiloides/g1:

ceylonicus Glazaczow 1987 [Pseudocentroptiloides (Psammonella)]  typus nominis Psammonella

christinae Waltz & McCafferty 1989 [Pseudocentroptiloides]  


Examined also:

sp.n.2 (Thailand) -

sp.n. (India) /