Information about Xyelidae
| Xyelidae | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Scientific classification | ||||||||||||||
| ||||||||||||||
| Genera | ||||||||||||||
|
see text | ||||||||||||||
The Xyelidae is a small family of sawflies known from fewer than 50 extant species in 5 genera, but with an extensive fossil record; they are the oldest fossil Hymenoptera, dating back to the Triassic, some 200 million years ago. Most species occur in the Northern Hemisphere, especially in boreal regions, though there are a few neotropical species. Most are associated with conifers (esp. Pinus and Abies), where the larvae feed on pollen or within buds, though larvae of a few species feed on the leaves of deciduous trees.
The family is characterized by the appendages of the head, which are truly remarkable in that the antennae and palpi are nearly leg-like in structure, with a long basal segment followed by a series of tiny segments, as in the tibia-tarsus. It is tempting to speculate that there is a homeobox-gene explanation for this unusual anatomy, as mutations of this gene region in other insects can cause the mouthparts and antennae to become leg-like.
Extant genera
- Macroxyela Kirby, 1882
- Megaxyela Ashmead, 1898
- Pleroneura Konow, 1897
- Xyela Dalman, 1819
- Xyelecia Ross, 1932
Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
..... Click the link for more information.
..... Click the link for more information.
Editing of this page by unregistered or newly registered users is currently disabled until (UTC) due to vandalism.
If you are prevented from editing this page, and you wish to make a change, please discuss changes on the talk page, request unprotection, log in, or
..... Click the link for more information.
If you are prevented from editing this page, and you wish to make a change, please discuss changes on the talk page, request unprotection, log in, or
..... Click the link for more information.
Arthropoda
Latreille, 1829
Subphyla and Classes
..... Click the link for more information.
Latreille, 1829
Subphyla and Classes
- Subphylum Trilobitomorpha
- Trilobita - trilobites (extinct)
- Subphylum Chelicerata
..... Click the link for more information.
Insecta
Linnaeus, 1758
Orders
Subclass Apterygota
..... Click the link for more information.
Linnaeus, 1758
Orders
Subclass Apterygota
- * Archaeognatha (bristletails)
- * Thysanura (silverfish)
- * Infraclass Paleoptera (Probably paraphyletic)
..... Click the link for more information.
Hymenoptera
Linnaeus, 1758
Suborders
Apocrita
Symphyta
Hymenoptera is one of the larger orders of insects, comprising the sawflies, wasps, bees, and ants.
..... Click the link for more information.
Linnaeus, 1758
Suborders
Apocrita
Symphyta
Hymenoptera is one of the larger orders of insects, comprising the sawflies, wasps, bees, and ants.
..... Click the link for more information.
- Symphyta redirects here. For the moth genus, see Symphyta (moth).
Sawflies
Scientific classification
Kingdom: Animalia
Phylum:
..... Click the link for more information.
Xyeloidea
Families
Xyelidae- xyelid sawflies
Xiphydriidae- wood wasps
The Xyeloidea are a small superfamily within the Symphyta, containing fewer than 200 extant species, but with an extensive fossil record.
..... Click the link for more information.
Families
Xyelidae- xyelid sawflies
Xiphydriidae- wood wasps
The Xyeloidea are a small superfamily within the Symphyta, containing fewer than 200 extant species, but with an extensive fossil record.
..... Click the link for more information.
- Symphyta redirects here. For the moth genus, see Symphyta (moth).
Sawflies
Scientific classification
Kingdom: Animalia
Phylum:
..... Click the link for more information.
Hymenoptera
Linnaeus, 1758
Suborders
Apocrita
Symphyta
Hymenoptera is one of the larger orders of insects, comprising the sawflies, wasps, bees, and ants.
..... Click the link for more information.
Linnaeus, 1758
Suborders
Apocrita
Symphyta
Hymenoptera is one of the larger orders of insects, comprising the sawflies, wasps, bees, and ants.
..... Click the link for more information.
The Triassic is a geologic period that extends from about 251 to 199 Ma (million years ago). As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events.
..... Click the link for more information.
..... Click the link for more information.
In biogeography, Neotropic or Neotropical refers to one of the world's eight terrestrial ecozones.
This ecozone includes South and Central America, the Mexican lowlands, the Caribbean islands, and southern Florida, because these regions share a large number of plant
..... Click the link for more information.
This ecozone includes South and Central America, the Mexican lowlands, the Caribbean islands, and southern Florida, because these regions share a large number of plant
..... Click the link for more information.
Pinophyta
Class: Pinopsida
Orders & Families
Cordaitales †
Pinales
Pinaceae - Pine family
Araucariaceae - Araucaria family
Podocarpaceae - Yellow-wood family
..... Click the link for more information.
Class: Pinopsida
Orders & Families
Cordaitales †
Pinales
Pinaceae - Pine family
Araucariaceae - Araucaria family
Podocarpaceae - Yellow-wood family
..... Click the link for more information.
Pinus
L.
Subgenera
..... Click the link for more information.
L.
Subgenera
- Subgenus Strobus
- Subgenus Ducampopinus
- Subgenus Pinus
..... Click the link for more information.
FIR may stand for:
..... Click the link for more information.
- FIR FILM IMPACT RECAP directed by trident and hosted by kathi selvakumar on rogers channel 622
- Finite impulse response, a digital filter type.
..... Click the link for more information.
larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians).
The larva can look completely different from the adult form, for example, a caterpillar differs from a butterfly.
..... Click the link for more information.
The larva can look completely different from the adult form, for example, a caterpillar differs from a butterfly.
..... Click the link for more information.
Pollen is a fine to coarse powder consisting of microgametophytes (pollen grains), which produce the male gametes (sperm cells) of seed plants. The pollen grain with its hard coat protects the sperm cells during the process of their movement between the stamens
..... Click the link for more information.
..... Click the link for more information.
Deciduous means "temporary" or "tending to fall off" (deriving from the Latin word decidere, to fall off) and is typically used in reference to trees or shrubs that lose their leaves seasonally.
..... Click the link for more information.
..... Click the link for more information.
Antennae (singular antenna) are paired appendages connected to the front-most segments of arthropods. In crustaceans, they are biramous and present on the first two segments of the head, with the smaller pair known as antennules.
..... Click the link for more information.
..... Click the link for more information.
Pedipalps, the second pair of appendages of the cephalothorax in Arachnida, is homologous with mandibles in Crustacea, and corresponding to the mandibles of insects. The pedipalps are appendages of six segments: the coxae, a single trochanter, the femur, a short patella, the tibia,
..... Click the link for more information.
..... Click the link for more information.
The arthropod leg is a form of jointed appendage of arthropods, usually used for walking. Many of the terms used for arthropod leg segments are of Latin origin, and may be confused with terms for bones: coxa (meaning hip), trochanter
..... Click the link for more information.
..... Click the link for more information.
A homeobox is a DNA sequence found within genes that are involved in the regulation of development (morphogenesis) of animals, fungi and plants. Genes that have a homeobox are called homeobox genes and form the homeobox gene family.
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
