Parajulidae is a
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
of
millipede
Millipedes (originating from the Latin , "thousand", and , "foot") are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derive ...
s in the order
Julida
Julida is an order of millipedes. Members are mostly small and cylindrical, typically ranging from in length. Eyes may be present or absent, and in mature males of many species, the first pair of legs is modified into hook-like structures. Addit ...
, occurring predominantly in North America but also in Central America and East Asia. Parajulids are found from Alaska to as far south as Guatemala. Male Parajulids have a greatly enlarged first pair of legs, and externally exposed
gonopods
Gonopods are specialized appendages of various arthropods used in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ. In crustaceans and millipe ...
, in contrast to the largely Eurasian family
Julidae
Julidae is a family of millipedes in the order Julida, containing more than 600 species in around 20 genera. Its members are largely confined to the Western Palaearctic, with only a few species extending into the Oriental and Afrotropical realm ...
which have a small, hook-shaped first pair of legs, and gonopods concealed internally.
[Cook, O. F. (1909)]
Myriapoda of Northwestern North America
Alaska / Harriman Alaska Expedition, 8 p. 69.
Genera
*''
Aliulus''
*''
Aniulus''
*''
Apacheiulus''
*''
Arvechamboides''
*''
Arvechambus''
*''
Bollmaniulus''
*''
Codiulus''
*''
Ethoiulus''
*''
Ethojulus''
*''
Georgiulus''
*''
Gosiulus''
*''
Gyniulus''
*''
Hakiulus''
*''
Karteroiulus''
*''
Litiulus''
*''
Mexicoiulus''
*''
Mulaikiulus''
*''
Nesoressa''
*''
Okliulus''
*''
Oriulus''
*''
Parajulus''
*''
Pheniulus''
*''
Pseudojulus''
*''
Ptyoiulus''
*''
Saiulus''
*''
Simiulus''
*''
Sophiulus''
*''
Spathiulus''
*''
Teniulus''
*''
Thriniulus''
*''
Tuniulus''
*''
Uroblaniulus''
*''
Ziniulus''
References
External links
*
Julida
Millipede families
Taxa named by Charles Harvey Bollman
{{Millipede-stub