Plesiomorphon Rhoenanthus/g1

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Fimbriatotergaliae Potamanthus/fg1 - Rhoenanthus/g1)

Nomen hierarchicum: Rhoenanthus/g1 [g:1881]

In circumscription fits:

plesiomorphon Rhoenanthus/g1: Kluge 2004: 222

Nominal taxa included:

Potamanthodes/g [g:1920] 

Potamanthindus/g [g:1931] 

Rhoenanthopsis/g [g:1932] (typus magnificus [Rhoenanthus]); synonym of Rhoenanthopsis/g is Neopotamanthodes/g [g:1938] (typus lanchi [N.]) (subjective synonymy: magnificus [Rh.] = lanchi [N.]) 

Neopotamanthus/g [g:1986] 

Stygifloris/g [g:1990]

References. Eaton 18831888 (Rhoenanthus): '; Ulmer (1919)1920:180 (Potamanthodes): '; Lestage 1931b: '; You 1984 (Potamanthodes): '; Yoon & Bae 1985 (Potamanthodes): ' '; Bae & McCafferty & Edmunds 1990 (Stygifloris): ' '; Bae & McCafferty 1991: ' '; Kluge 2004: * * * *.

Plesiomorphies and variable characters of Rhoenanthus/g1. Larvae of some species (speciosus [Rhoenanthus], obscurus [Rh.], coreanus [Potamanthus] and youi [Neopotamanthus]) have long tusks [see Potamanthus/fg1 (7)] and elongated fore legs without transverse row of setae on femur (as in Anthopotamus). Larvae of other species (formosus [Potamanthus], sabahensis [Stygifloris] and some others) have short tusks (as in Potamanthus/fg3 or somewhat longer) and a distinctly expressed transverse row of setae on fore femur [see Potamanthus/fg1 (3)].

Radial vein of hind wing from slightly arched (as in Potamanthus/fg2) to sharply arched basally. In various species imaginal and subimaginal paracercus is either completely developed in both sexes, or vestigial in male and developed in female, or vestigial in both sexes (non-unique character see Index of characters [2.3.22]).

Shape of penis is various, but not as in Potamanthus/fg2: penis lobes are either narrow without widenings, with blunt or pointed apices (in formosus [Potamanthus] and others), or wide with blunt apices (in speciosus [Rhoenanthus] and others).

Size. Fore wing length 719 mm.

Distribution. South-East Asia (to the north up to Primorye Territory of Russia).

Nominal species in Rhoenanthus/g1:

auratus Lestage 1931 [Potamanthindus] syn.subj. obscurus [Rhoenanthus]

coreanus Yoon & Bae 1985 [Potamanthus] ,

distafurcus Bae & McCafferty 1991 [Rhoenanthus (Rhoenanthus)]

ferrugineus Navás 1930 [Rhoenanthus] syn.subj. magnificus [Rhoenanthus]

formosus Eaton 1892 [Potamanthus] typus nominis Potamanthodes ,,

fujianensis You & Wu & Gui & Hsu 1980 [Potamanthodes] syn.subj. kwangsiensis [Potamanthodes]

hunanensis You & Gui 1995 [Neopotamanthus]

idiocerus Bae & McCafferty 1991 [Potamanthus (Potamanthodes)]

iyonis Matsumura 1931 [Potamanthus] syn.subj. formosus [Potamanthus]

kamonis Imanishi 1940 [Potamanthus (Potamanthodes)] syn.subj. formosus [Potamanthus]

kwangsiensis Hsu 1937 [Potamanthodes]

lanchi Hsu 1938 [Neopotamanthodes] typus nominis Neopotamanthodes syn.subj. magnificus [Rhoenanthus]

longitibius Bae & McCafferty 1991 [Potamanthus (Potamanthodes)]

macrophthalmus You 1984 [Potamanthodes]

magnificus Ulmer 1920 [Rhoenanthus] typus nominis Rhoenanthopsis ,

nanchangi Hsu 1936 [Potamanthodes]

obscurus Navás 1922 [Rhoenanthus]

rohdendorfi Tshernova 1985 [Rhoenanthus] syn.subj. coreanus [Potamanthus]

sabahensis Bae & McCafferty 1990 [Stygifloris]

sangangensis You 1984 [Potamanthodes]

sapa Nguyen & Bae 2004 [Rhoenanthus (Potamanthindus)]

speciosus Eaton 1881 [Rhoenanthus]

subcostalis Navás 1932 [Potamanthus]

tungaiensis Balasubramanian & Muthukatturja (in Balasubramanian & Muthukatturja & Anbalagan) 2019 [Rhoenanthus (Rhoenanthus)]

vitalisi Navás 1922 [Rhoenanthus] syn.subj. magnificus [Rhoenanthus]

yooni Bae & McCafferty 1991 [Potamanthus (Potamanthodes)]

youi Wu & You 1986 [Neopotamanthus]

yunnanensis You & Wu & Gui & Hsu 1982 [Potamanthodes]

Examined also:

sp.P1: Kluge 2004 (China)

sp.P2: Kluge 2004 (China)

sp.P3: Kluge 2004 (China)