Baetidae is a family of mayfly with about 1000 described species in 110 genera distributed worldwide.[ These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies. Most species have long oval forewings with very few cross veins (see Comstock-Needham system) but the hindwings are usually very small or even absent. The males often have very large insect eye, shaped like turrets above the head (this is known as "turbinate condition").
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Baetids breed in a wide range of waters from and to and even rain barrel. The nymphs are strong swimmers and feed mainly on algae.
Taxonomy
The majority of living genera (approximately 95) are placed in the subfamily Baetinae ,[ BioLib.cz: family Baetidae Leach, 1815 (retrieved 31 March 2024)] with the subfamily Palaeocloeoninae Kluge, 1997 consisting of the single genus †Palaeocloeon from the Santonian aged Taimyr amber. The oldest members of the family date to the Late Cretaceous, with Myanmarella and Vetuformosa known from the Cenomanian aged Burmese amber. The genus Petracloeon Sroka & Gattolliat, 2025 is known from the Campanian-aged Tar Heel Formation of North Carolina, USA.
Selected genera in subfamily Baetinae
Unplaced genera
Source:[
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Acentrella
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Acerobiella
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Baetodes
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Cloeon
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Cymbalcloeon
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Macuxi
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Megabranchiella
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Paracloedes - monotypic P. leptobranchus
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Procerobaetis
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Waynokiops
See also
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List of mayflies of the British Isles
