CLADOENDESIS OF EPHEMEROPTERA
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Rhionella

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Ephemerella/fg1Tricorythus/fg1Ephemerella/fg2Timpanoga/fg1Ephemerella/fg3Torleya/g1Ephemerella/fg4 
Cincticostella/g1NotacanthellaCincticostella/g2EphacerellaCincticostella/g3 - Rhionella)

Nomen hierarchicum: Rhionella/g(1) [g:1980]

In circumscription fits:

— subgen. Rhionella Allen 1980: 83

— Rhionella/g(1): Kluge 2004: 312

References. Gose 1969 (Ephemerella TEA): '; – Allen 1971 (Ephemerella insolta): '; – Tshernova 1972 (Asiatella femorata): '; – Allen 1975 (E. boja, E. femorata, E. insolta): '; – Kluge 2004: *

Autapomorphies of Rhionella.

(1) Larval middle and hind femora are very strongly widened, with serrate margins. Non-unique apomorphy.

(2) Larval head with a pair of preoccipital tubercles. Non-unique apomorphy.

Size. Larval body length 6–12 mm. 

Distribution. Indo-China.

Nominal species in Rhionella/g(1):  

bifurcata Xie & Zhou (MS) [Cincticostella]

boja Allen 1975 [Ephemerella (Cincticostella)]

femorata Tshernova 1972 [Asiatella]

insolta Allen 1971 [Ephemerella (Cincticostella)] —  typus nominis Rhionella

ranga Selvakumar & Subramanian (in Martynov & Selvakumar & Subramanian & Sivaramakrishnan & Chandra & Palatov & Sinha & Jacobus) 2019 [Cincticostella]

richardi Martynov & Palatov (in Martynov & Selvakumar & Subramanian & Sivaramakrishnan & Chandra & Palatov & Sinha & Jacobus) 2019 [Cincticostella]

sivaramakrishnani Martynov & Palatov (in Martynov & Selvakumar & Subramanian & Sivaramakrishnan & Chandra & Palatov & Sinha & Jacobus) 2019 [Cincticostella]

 tornata Auychinda & Gattolliat (in Auychinda & Murányi & Li & Sartori & Gattolliat) 2020 [Cincticostella]

See also: 

Ephemerella/fg3 INCERTAE SEDIS 

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