Publications by authors named "Douglas J Williams"

A list of genus names in the scale insects published between 2014 and the end of 2019 is provided; it follows on from an earlier comprehensive list of the names published between 1758 and the end of 2013. Each genus name and its type species are assigned to one of the 53 scale insect families now recognised.

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This paper attempts to establish the correct status of three species names in the mealybug genus Rastrococcus Ferris (Hemiptera: Coccomorpha: Pseudococcidae). At present, 31 species are included in the genus (García Morales et al. 2019).

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The soft scale insect genus Paralecanium Cockerell (Hemiptera: Coccomorpha: Coccidae), mainly characterised by the possession of fan-shaped marginal setae, has never been revised and most of the species currently recognised were described in the early part of the twentieth century. The present revision is based on the morphology of the adult females and redescribes and illustrates all 34 species or subspecies previously included in the genus. These three subspecies have been raised to full specific rank, namely P.

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Fourteen species of armored scale insects are known only from New Caledonia. Here, the adult female of fourteen more are described: , , , , , , , , , , , , , and We note that the diversity of New Caledonian armored scale insects appears to have resulted more from trans-oceanic dispersal than in situ speciation.

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Ryoichi Takahashi (1898-1963) was a Japanese entomologist with considerable expertise on the Sternorrhyncha of the Far East and southern Asia. Most of his early articles were in Japanese, the first being published in 1916; but later he also wrote many articles in English. At first he published mainly on aphids (Aphidomorpha) and whiteflies (Aleyrodomorpha).

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New Caledonia is home to many endemic species of plants and animals. Here, we improve our grasp on that biota by describing five new species of armored scale insects in the genus : , , , , and Each is known exclusively from collections on southern beeches ( spp.) in New Caledonia.

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Here we redescribe the felt scale genus Pedroniopsis Green and its type species Pedroniopsis beesoni Green for the first time since it was described 90 years ago. We consider that the genus belongs to the family Eriococcidae as presently understood but realise that the family may not be monophyletic. The species was collected in crevices and pits on the bark of Shorea robusta (Dipterocarpaceae) from Odisha State, India, which is its only known locality in India.

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The scale insect family Cerococcidae (Hemiptera: Coccomorpha) or false pit scales was last revised during the 1970s and 1980s. At that time, it included three genera, Asterococcus Borchsenius, Cerococcus Comstock and Solenophora Maskell, and a total of 69 species. The present revision concentrates on species known from the western Palaearctic, western Oriental and Afrotropical Regions but includes notes on all known cerococcid species.

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The morphologies of Fiorinia phantasma (Cockerell & Robinson) (Hemiptera: Coccomorpha: Diaspididae) and F. coronata Williams & Watson are reviewed, and the name F. coronata is placed as a junior synonym of the name F.

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The genus Dactylopius is the only genus at present in the family Dactylopiidae. Since the name Dactylopius was proposed in 1829, however, numerous other species names belonging to different families of scale insects have been combined with it and these are also listed. The present status and the family placement are also given for each species.

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Genus names of the scale insects (Hemiptera: Coccoidea) are listed with their current families. The list includes all generic names that are currently valid with synonyms, unjustified emendations, homonyms, nomia nuda and misspellings. The list has been compiled from many sources as discussed in the introduction.

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We give some simple rules on Latin grammar to help scale insect systematists to apply the correct adjectival gender endings to species names. We list some common errors that have occurred when species names have either been proposed with a wrong gender ending or when they have been transferred from one genus to another. We also correct the gender endings to several species names in a few families.

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In order to clarify the taxonomic status and to preserve the stability of the species, a neotype is designated for the tuliptree scale: Coccus liriodendri Gmelin (now Toumeyella liriodendri). The adult female of this scale insect is redescribed and illustrated from newly collected specimens in its native range and on its type host, the tulip tree, Liriodendron tulipifera L. (Magnoliales: Magoliaceae).

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