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The order Symphypleona, also known as the globular springtails, is one of the three main groups of springtails (Collembola), tiny hexapods related to
The following is a list of the families within Symphypleona, grouped by superfamily. It includes extinct families known only from fossil remains.
* Superfamily Sminthuridoidea
:* Family Mackenziellidae
:* Family Sminthurididae
* Superfamily Katiannoidea
:* Family Katiannidae
:* Family Spinothecidae
:* Family Arrhopalitidae
:* Family Collophoridae
* Superfamily Sturmioidea
:* Family
insect
Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...
s. When the springtails were still believed to be an order of insects, the Symphypleona were ranked as a suborder.
They can be best distinguished from the other springtail groups by their body shape. The Symphypleona are very round animals, almost spherical, and usually have long antennae. The Poduromorpha, by contrast, always have short legs and a plump body, but more oval in shape than the Symphypleona. The Entomobryomorpha are the slimmest springtails, some with long and some with short legs and antennae, but always with a very slender body.
Systematics
The Symphypleona order was previously suggested to also contain family Neelidae, as a very apomorphic relative in the Sminthuridae superfamily. Phylogenetic studies however suggest Neelidae to be the only family of Neelipleona order.Gao, Yan; Bu, Yun & Luan, Yun-Xia (2008): Phylogenetic Relationships of Basal Hexapods Reconstructed from Nearly Complete 18S and 28S rRNA Gene Sequences. '' Zool. Sci.'' 25(11): 1139-1145. (HTML abstract)Families
The following is a list of the families within Symphypleona, grouped by superfamily. It includes extinct families known only from fossil remains.
* Superfamily Sminthuridoidea
:* Family Mackenziellidae
:* Family Sminthurididae
* Superfamily Katiannoidea
:* Family Katiannidae
:* Family Spinothecidae
:* Family Arrhopalitidae
:* Family Collophoridae
* Superfamily Sturmioidea
:* Family Sturmiidae
The order (biology), order Symphypleona, also known as the globular springtails, is one of the three main groups of springtails (Collembola), tiny Hexapoda, hexapods related to insects. When the springtails were still believed to be an order of i ...
* Superfamily Sminthuroidea
:* Family Sminthuridae
:* Family Bourletiellidae
* Superfamily Dicyrtomoidea
:* Family Dicyrtomidae
References
External links
* {{Taxonbar, from=Q915691 Collembola