4-554: Adelgidae Phylloxeridae The Phylloxeroidea is a small superfamily of the Hemiptera within the infraorder Aphidomorpha which is closely related to the aphids which are traditionally included in the Aphidoidea , which is the sister taxon . The two extant families are the pine and spruce aphids ( Adelgidae , including the former family Chermesidae , or "Chermidae") and the phylloxerans ( Phylloxeridae ), including vine phylloxera ,
8-467: A serious pest of grapevines. This Hemiptera article related to members of the insect suborder Sternorrhyncha is a stub . You can help Misplaced Pages by expanding it . Adelgidae See text The Adelgidae are a small family of the Hemiptera closely related to the aphids , and often included in the Aphidoidea with the Phylloxeridae or placed within the superfamily Phylloxeroidea as
12-506: A sister of the Aphidoidea within the infraorder Aphidomorpha . The family is composed of species associated with pine , spruce , or other conifers, known respectively as "pine aphids" or "spruce aphids". This family includes the former family Chermesidae, or "Chermidae", the name of which was declared invalid by the ICZN in 1955. There is still considerable debate as to the number of genera within
16-572: The family, and the classification is still unstable and inconsistent among competing authors. There are about fifty species of adelgids known. All of them are native to the northern hemisphere, although some have been introduced to the southern hemisphere as invasive species . Unlike aphids, the adelgids have no tail-like cauda and no cornicles . Adelgids only lay eggs, and never give birth to live nymphs as aphids do. Adelgids are covered with dense woolly wax. A complete adelgid life cycle lasts two years. Adelgid nymphs are known as sistentes, and
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