CLADOENDESIS OF EPHEMEROPTERA |
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Mayobaetis
(Panephemeroptera
Euephemeroptera
Euplectoptera
Anteritorna
pm.Tridentiseta
Tetramerotarsata
Liberevenata
Turbanoculata
Anteropatellata
Baetovectata
Baetungulata
- Mayobaetis)
Nomen hierarchicum:
Mayobaetis/g(1)
[g:1985]
In circumscription fits:
— subgen. Mayobaetis Waltz & McCafferty 1985a: 240
— gen. Mayobaetis: Lugo-Ortiz & McCafferty 1996
References.
Mayo 1973 (Baetis ellenae):
; – Waltz &
McCafferty 1985:
; –
Lugo-Ortiz & McCafferty 1996: ?.
Autapomorphies of Mayobaetis. () Larva is adopted to climb out of the water onto a rock and jump back to the water: legs are relatively shorter, thicker and stronger than in other baetids, that allows larva to crawl by a wet rock (while legs retain possibility to stretch back and press to the body when larva swims); abdomen is relatively larger and stronger than in other baetids, that allows larva to jump from a wet rock. () On larval antenna pedicellus is attached to a distal-lateral angle of scapus, so scapus has a free projected distal-median angle, which bears stout protuberances; similar protuberances on median side of pedicellus. () Larval crercus with one large lateral spine-like seta near posterior margin of each segment. Characters of Mayobaetis of unclear phylogenetic status. () Larval antennae bases are not turned together, frons between them does not form a keel (see Index of characters [1.1.3]). () Larval claw [see Baetungulata (1)] bears a large seta on posterior-inner side (see Index of characters [1.2.24]). () Larval abdominal terga with scales in operculate sockets [see Turbanoculata (12)] (see Index of characters [1.3.4]). Plesiomorphies of Mayobaetis. In mature larva ready to moult to subimago, buds of subimaginal gonostyli are folded under larval cuticle by the "Nigrobaetis-type": 2nd segment of gonostylus is directed posteriorly and curved by its convexity medially and by apex laterally [see Baetovectata (3)] (see Index of characters [2.3.9]). Larval paracercus is developed. |
Size. Fore wing length ? mm (see Tetramerotarsata).
Distribution. Neotropical Region.
Nominal species in Mayobaetis/g(1):
ellenae Mayo 1973
[Baetis]
— typus nominis Mayobaetis
-
-
/
Examined also:
See also: