Information om | Engelska ordet PROLEGS

Exempel på hur man kan använda PROLEGS i en mening

• The larvae are caterpillar-like, but can be distinguished by the number of prolegs and the absence of crochets in sawfly larvae.
• When disturbed, many inchworms stand erect and motionless on their prolegs, further increasing this resemblance.
• Larvae of dobsonflies differ from those of their sister clade, the alderflies, in that they bear eight pairs of lateral processes as well as anal prolegs with a pair of terminal hooks used to hold themselves to substrate, and also in that they lack a terminal filament.
• The body lacks prolegs, but the body segments are divided into a series of rings called annuli (singular is annulus).
• However, unpaired prolegs, a ventrally directed truncate head, and prothoracic spiracles on a short respiratory tube differentiate them.
• Larvae might be confused with the similarly flattened larvae of lycaenid butterflies, but those caterpillars have prolegs, are always longer than they are wide, and are always densely covered in short or long setae (hair-like bristles).
• Diagnostic characters for larvae include the presence of a frontoclypeal suture, flat and dome-like antennal sensorium, simple malar apex which is not cleft, simple ninth sternum, annular or annular- multiforous spiracles, and the absence of an endocarina, mandibular prostheca, hypostomal rods, ventral prolegs, and patches or rows of tergal asperites.
• The thoracal legs are well developed, the prolegs are strongly reduced, and only at high magnification the single circle of crochets and the small papilla are visible; the anal prolegs are completely reduced, but this may be due to the investigated larvae being in the process of pupation.
• The larvae – caterpillars – have a toughened (sclerotised) head capsule, chewing mouthparts, and a soft body, that may have hair-like or other projections, three pairs of true legs, and up to five pairs of prolegs.
• Some larvae, such as those of most beetles in the family Chrysomelidae, are described as eruciform, although they are short, have swollen abdomens, and have no true "prolegs" such as caterpillars have.
• In the so-called "macrolepidoptera", which constitutes about 60% of lepidopteran species, there was a general increase in size, better flying ability (via changes in wing shape and linkage of the forewings and hindwings), reduction in the adult mandibles, and a change in the arrangement of the crochets (hooks) on the larval prolegs, perhaps to improve the grip on the host plant.
• The larvae of this species has been observed, in the present of an Ichneumon wasp, gripping the blade of its foodplant with its prolegs and beating it with its body, causing the blade to move from side to side.
• Males differ from females in the basal tarsomeres of the prolegs and midlegs being weakly dilated, and the protarsal claws being unequal and much shorter than the terminal tarsomere.

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