CLADOENDESIS OF EPHEMEROPTERA

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Nesameletus/f2=Metamonius/g2

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta
 Nesameletus/f1=Metamonius/g1 - Nesameletus/f2=Metamonius/g2)

Nomen hierarchicum: Nesameletus/f2=Metamonius/g2 [f:1973; g:1885] (sine Siphluriscus)

In circumscription fits:

— Nesameletus complex: Penniket 1961

— subfam. Nesameletinae Riek 1973: 164

— fam. Metamoniidae McCafferty 1991a: 349

— fam. Nesameletidae: Kluge & Studemann & Landolt & Gonser 1995: 115

— Nesameletus/f2=Metamonius/g2: Kluge 2004: 109

Nominal taxa included:

Nesameletus/fg [f:1973; g:1933]

Metamonius/fg [f:1991; g:1885]

Ameletoides/g  [g:1933]


References. Eaton 1833-1888 (Metamonius): '; – Ulmer 1904 (Nymphe des Baetis-Typus): '; – Tillyard 1933 (Ameletoides, Nesameletus): ' '; – Riek 1955 (Ameletoides): ' '; – Demoulin 1955b (Metamonius): '; – 1955c (Metamonius): '; – Kimmins 1960 (Metamonius): '; – Koss & Edmunds 1974: *; – Edmunds 1975: *; – Kluge & al. 1995: * * *; – Kluge 2004: * * *.


Autapomorphies of Nesameletus/f2=Metamonius/g2.

(1) Mandible [see Nesameletus/f1=Metamonius/g1 (1)] is elongate perpendicular to axis of articulation (Kluge 2004: Fig.31:D).

(2) On maxilla 1st dentiseta is very massive, sclerotized, pressed to canines [shortened – see Nesameletus/f1=Metamonius/g1 (2)] (Kluge 2004: Fig.31:A-C). The same in selected taxa among Tetramerotarsata.

(3) 2nd and 3rd dentisetae [situated on a common base – see Nesameletus/f1=Metamonius/g1 (3)] are weak, their common base represents a wide thin plate (Kluge 2004: Fig.31:A).

(4) Larval claw on inner side has 2 longitudinal rows of small denticles. Non-unique apomorphy (see Index of characters [1.2.21]).

(5) On each tergalius II–VII anal rib bifurcates near base, its anterior branch is situated on dorsal surface and passes near middle of tergalius [see Nesameletus/f1=Metamonius/g1 (9)], and posterior branch is situated on anal margin and represents a 3rd (additional) rib. Similar 3 ribs are present also in Rallidens and Isonychia/fg1.

(6) Subimaginal lateral pigmented sclerotized area of mesonotum has peculiar form and includes whole anterior part of lateroscutum (Kluge 2004: Fig.30:D). The same in Ameletopsis/fg1.

Size. Fore wing length 12–17 mm.

Distribution. Notogea: Australia, New Zealand and Chile-Patagonian Region of South America.


Nominal species in Nesameletus/f2=Metamonius/g2:

anceps Eaton 1883 [Siphlurus] — typus nominis Metamonius -

austrinus Hitchings & Staniczek 2003 [Nesameletus]

flavitinctus Tillyard 1923 [Ameletus]

fuegiensis Lestage 1935 [Ameletus] — syn.subj. anceps [Metamonius]

lacusalbinae Tillyard 1933 [Ameletoides] — typus nominis Ameletoides

murihiku Hitchings & Staniczek 2003 [Nesameletus]

ornatus Eaton 1883 [Chirotonetes] — typus nominis Nesameletus ,/,//

vulcanus Hitchings & Staniczek 2003 [Nesameletus]


See also:

Nesameletus spp.

Metamonius spp.

Ameletoides spp.

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