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From Wikipedia, the free encyclopedia

Adult Sialis lutaria
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Subclass: Pterygota
Infraclass: Neoptera
Superorder: Endopterygota or Neuropterida
Order: Megaloptera
Family: Sialidae
Leach, 1815
Subfamily: Sialinae

and see text

Alderflies are megalopteran insects of the family Sialidae. They are closely related to the dobsonflies and fishflies as well as to the prehistoric Euchauliodidae. All living alderflies - about 66 species altogether[1] - are part of the subfamily Sialinae, which contains between one and about seven genera according to different scientists' views. But in most classifications, all or almost all of these are treated as subgenera of Sialis.[2]

Sialinae have a body length of less than 25 mm (1 inch), long filamentous antennae and four large dark wings of which the anterior pair is slightly longer than the posterior. They lack ocelli and their fourth tarsal segment is dilated and deeply bilobed. Dead alderfly larvae are used as bait in fishing.

The females lay a vast number of eggs upon grass stems near water. The larvae are aquatic, active, armed with strong sharp mandibles, and breathe by means of seven pairs of abdominal branchial filaments. When full sized they leave the water and spend a quiescent pupal stage on the land before metamorphosis into the sexually mature insect.

Sialis lutaria is the most common alderfly in the United Kingdom[3] and across much of Europe.

In addition to the living genus (or genera), there are several genera of fossil alderflies:[2]

  • Dobbertinia (sometimes separated as subfamily Dobbertiniinae, but actually basal)
  • Eosialis
  • Proindosialis

The latter two are Sialinae.


  1. ^ Engel & Grimaldi (2007)
  2. ^ a b See references in Haaramo (2008)
  3. ^ ARKive (2006)


External links



Up to date as of January 23, 2010

From Wikispecies


Main Page
Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Cladus: Pterygota
Cladus: Metapterygota
Cladus: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Neuropterida
Ordo: Megaloptera
Familia: Sialidae
Genera: Indosialis - Nipponosialis - Sialis



Vernacular names

English: Alderfly
日本語: センブリ科
中文: 泥蛉科
Wikimedia Commons For more multimedia, look at Category:Sialidae on Wikimedia Commons.


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