CLADOENDESIS OF EPHEMEROPTERA

 zzz

Z 

PAGE UNDER CONSTRUCTION

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 --/  

yala Nieto 2015 [Mayobaetis]


Examined also:

 


See also:

Baetovectata INCERTAE SEDIS

Turbanoculata INCERTAE SEDIS