Diptera.info

acrostichal setae (synonym)

Acalyptratae

Acalyptratae is a subsection of Schizophora, commonly referred to as the acalyptrate muscoids (or simply acalpytrates). It is a very large assemblage, exhibiting very diverse habits. The name refers to the lack of calypters in the members of this group of flies.
Links: Diptera classification

acalyptrate

Acalyptratae (synonym)

acalyptrates

Acalyptratae (synonym)

acr

acrostichal setae (synonym)

acrostichal seta

acrostichal setae (synonym)

acrostichal setae

One or more longitudinal rows of smaller to larger setae in the median part of the scutum, the rows being either regular or irregular (with setae more or less scattered).

acrostichals

acrostichal setae (synonym)

anterodorsal (synonym)

adventive species

A species that has arrived in the geographical area specified from somewhere else by any means (for instance with cargo). Compare with invasive species

header=[invasive species] body=[A species that is expanding its range, often but not always detrimentally (causing 'harm'). Compare with adventive species.<br />
Links: http://en.wikipedia.org/wiki/Invasive_species; http://www.invasive.org/browse/order.cfm?id=58 (Invasive and exotic Diptera on www.invasive org).<br />
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allotype

From the ICZN: 'The term "allotype" may be used to indicate a specimen of opposite sex to the holotype

header=[holotype] body=[The single specimen designated or otherwise fixed as the name-bearing type of a nominal species or subspecies when the nominal taxon is established. (From the Glossary of the International Code of Zoological Nomenclature) (http://www.diptera.info/weblinks.php?cat_id=5&weblink_id=72).<br /><img src='../../infusions//terms/images/no_image.gif' style='vertical-align:middle;' />] delay=[0] fade=[on]

; an "allotype" has no name-bearing function.'

alpha taxonomy

The first stage in taxonomy, viz. the descriptive stage which is concerned with the characterisation and naming of species. An example of a taxonomic exercise at the alpha level is:
Hines, J.S., 1911. New species of Diptera of the genus Erax. - The Ohio Naturalist 11(6): 307-311.
The next two stages in taxonomy are systematising (beta taxonomy) and evolutionary studies (gamma taxonomy).

anal cell

posterior cubital cell (synonym)

anterior

Located in the direction of the head when considering a position along the longitudinal axis. Even a structure near the apex

header=[apex] body=[Plural: apices. The end of something 'protruding from' or 'attached to' the (imaginary) center of the body or the end removed from the center of the body. For example, the end of the wing (apex of the wing), the abdomen (apex of the abdomen), the tibia (apex of the tibia), etc.<br /><img src='../../infusions//terms/images/no_image.gif' style='vertical-align:middle;' />] delay=[0] fade=[on]

of the abdomen has a side that is directed towards the head end and another that is directed towards the apex of the abdomen. Likewise, every structure perpendicular to the longitudinal axis of the body (leg, wing) has a side that is directed towards the head.

anterior notopleural setae

Large setae placed on the anterior part of the notopleuron

header=[notopleuron] body=[Lateral part of the mesonotum immediately posterior of postpronotal lobes. The notopleuron may be carrying several setae, the notopleural setae. If these are present it may be possible to distinguish between the anterior notopleural setae and the posterior notopleural setae. Presence, absence and number of notopleural setae may be of diagnostic and systematic importance.<br /><img src='http://www.diptera.info/infusions/terms/images/notopleuron.jpg' style='vertical-align:middle;' />] delay=[0] fade=[on]

, immediately posterior of the postpronotal lobe

header=[postpronotal lobe] body=[Lateral part of the postpronotum, especially in higher Diptera well visible, less so in some groups of lower Diepra (in particular Nematocera). Usually well intergrated with the scutum and often bearing setae (postpronotal setae).<br />
Synonyms: humerus (plural: humeri), humeral callus (plural: humeral calli)<br /><img src='http://www.diptera.info/infusions/terms/images/postpronotal_lobe.gif' style='vertical-align:middle;' />] delay=[0] fade=[on]

anterodorsal

Located in the plane between anterior

header=[anterior] body=[Located in the direction of the head when considering a position along the longitudinal axis. Even a structure near the apex of the abdomen has a side that is directed towards the head end and another that is directed towards the apex of the abdomen. Likewise, every structure perpendicular to the longitudinal axis of the body (leg, wing) has a side that is directed towards the head. <br />
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and dorsal

header=[dorsal] body=[1. Located on the dorsum. For legs this means that these are considered as if they were in the position as given in the illustration. So, even if a leg is pointing upwards in a specimen, one should image that the leg was positioned in a horizontal plane, perpendicular to the body axis.<br />
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2. Located in a more position towards the dorsum. For example, a seta can be located dorsal to another seta.<br />
<br />
Opposite: ventral.<br /><img src='http://www.diptera.info/images/orientation.gif' style='vertical-align:middle;' />] delay=[0] fade=[on]

anteroventral

Located in the plane between anterior

and ventral

header=[ventral] body=[1. Located on the venter. For legs this means that these are considered as if they were in the position as given in the illustration. So, even if a leg is pointing upwards in a specimen, one should image that the leg was positioned in a horizontal plane, perpendicular to the body axis.<br />
<br />
2. Located in a more position towards the venter. For example, a seta can be located ventral to another seta.<br />
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Opposite: dorsal.<br /><img src='http://www.diptera.info/images/orientation.gif' style='vertical-align:middle;' />] delay=[0] fade=[on]

anthropogenic

Originating from the activity of humans.
Example 1: The most serious historic anthropogenic stress on robber fly (Asilidae) populations has been the destruction of grassland habitat.' Robert A. Cannings Analysis of trends in species occurrence and abundance.
Example 2: 'Musca domestica has an anthropogenic distribution', meaning it has a distibution that is mainly determined by the spreading of the species by man.

apex

Plural: apices. The end of something 'protruding from' or 'attached to' the (imaginary) center of the body or the end removed from the center of the body. For example, the end of the wing (apex of the wing), the abdomen (apex of the abdomen), the tibia (apex of the tibia), etc.

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