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Ephemerids are generally quite large mayflies (up to 35 mm) with either two or three very long tails. Many species have distinctively patterned wings. [2] They breed in a wide range of waters, usually requiring a layer of silt as the nymphs have strong legs which are adapted for burrowing (the group is sometimes known as burrowing mayflies).
Animals can be ephemeral, with brine shrimp and the mayfly being examples. The placenta is considered an ephemeral organ present during gestation and pregnancy . Ephemerality is a component of olfaction , breathing, speech and memory, aligned with permanency in the latter.
This application of ephemera has been cited as the first example of aligning it with transient prints. [8] Ephemeral, by the mid-19th century, began to be used to generically refer to printed items. [3] Ephemera and ephemerality have mutual connotations of "passing time, change, and the philosophically ultimate vision of our own existence". [9]
Ephemera is a genus of mayfly in the family Ephemeridae. It contains the following species: Ephemera annandalei; Ephemera blanda; Ephemera brunnea; Ephemera compar;
Pages in category "Ephemera" The following 33 pages are in this category, out of 33 total. This list may not reflect recent changes. ...
Ephemera danica can reach an imago size of 15–20 mm (0.6–0.8 in) in males, while females are larger, reaching 16–25 mm (0.6–1.0 in). This mayfly, with its characteristic markings and three tails (), is the most commonly seen of British Ephemeridae.
a Beroe ovata, b unidentified cydippid, c "Tortugas red" cydippid, d Bathocyroe fosteri, e Mnemiopsis leidyi, and f Ocyropsis sp. [17]. Among animal phyla, the ctenophores are more complex than sponges, about as complex as cnidarians (jellyfish, sea anemones, etc.), and less complex than bilaterians (which include almost all other animals).
Theria (/ ˈ θ ɪər i ə / or / ˈ θ ɛr i ə /; from Ancient Greek θηρίον (thēríon) 'wild beast') is a subclass of mammals [2] amongst the Theriiformes.Theria includes the eutherians (including the placentals) and the metatherians (including the marsupials) but excludes the egg-laying monotremes and various extinct mammals evolving prior to the common ancestor of placentals and ...