(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Fimbriatotergaliae Caenotergaliae Neoephemera/fg1 - Potamanthellus)

Nomen hierarchicum: Potamanthellus/g1 [g:1931] (incl. Neoephemeropsis)

In circumscription fits:

gen. Potamanthellus: Bae & McCafferty 1998: 39

Potamanthellus/g1: Kluge 2004: 276

Synonym: subjective synonym of Potamanthellus/g (typus horai [Potamanthellus]) is Rhoenanthodes/g [g:1931] (typus amabilis [Rhoenanthus]) (subjective synonymy: amabilis [R.] = horai [P.])

Nominal taxon included: Neoephemeropsis/g [g:1939]

References. Eaton 1892b (Rhoenanthus amabilis): '; Lestage 1931b: '; Hsu 1936: '; Ulmer 1939: (L)' '; Dang 1967: '; Tiunova & Levanidova 1989: '; Tiunova 1991: '; Bae & McCafferty 1998: * *; Kluge 2004: * * * *

Autapomorphies of Potamanthellus.

(1) Gonostyli and penis are vestigial: gonostylus is strongly diminished, 1st segment is not expressed, thus gonostylus is 3-segmented (in selected specimens 1- or 2-segmented if apical segments are fused); in most species (except for caenoides [Neoephemeropsis]) median part of penis is lost, thus penis has a form of a pair of widely separated narrow sticks curved medially.

Characters of Potamanthellus of unclear phylogenetic status.

(2) Imaginal and subimaginal paracercus is vestigial, consists of several segments. Non-unique apomorphy (see Index of characters [2.3.22]); among Neoephemera/fg1 the same in Leucorhoenanthus; possibly synapomorphy.

(3) On fore leg of male imago both claws are blunt (in subimago ephemeropteroid). Non-unique apomorphy (see Index of characters [2.2.77]); among Neoephemera/fg1 the same in Pulchephemera and Leucorhoenanthus; possibly synapomorphy.

(4) Larval caudalii [which have no primary swimming setae see Furcatergaliae (6)] have dense secondary swimming setae: a row of setae is present on lateral and median side of each cercus and on each lateral side of paracercus. In other Neoephemera/fg2 swimming setae are absent; but they are present in many other Furcatergaliae, including selected species of Caenoptera.

Plesiomorphies of Potamanthellus. Larval thoracic terga without protuberances (unlike Neoephemera/fg2). Larval and adult patella-tibial suture is developed on middle and hind legs (unlike Ochernova).

Size. Fore wing length 610 mm. 

Distribution. Eastern Asia.

Nominal species in Potamanthellus/g1: 

amabilis Eaton 1892 [Rhoenanthus] typus nominis Rhoenanthodes

caenoides Ulmer 1939 [Neoephemeropsis] typus nominis Neoephemeropsis

chinensis Hsu 1936 [Potamanthellus] --/

cuaraoensis Dang 1967 [Neoephemeropsis] syn.subj. amabilis [Rhoenanthus]

edmundsi Bae & McCafferty 1998 [Potamanthellus] --,

ganges Bae & McCafferty 1998 [Potamanthellus]

horai Lestage 1930 [Potamanthellus] typus nominis Potamanthellus syn.subj. amabilis [Rhoenanthus]

rarus Tiunova & Levanidova 1989 [Neoephemeropsis] syn.subj. chinensis [Potamanthellus]

shaowuensis Gui & Zhou & Su 1999 [Potamanthellus]

unicutibius Nguyen & Bae 2004 [Potamanthellus]

Examined also:

spp. ,

See also:

Neoephemera/fg1 INCERTAE SEDIS