SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

A new standard description of Collembola Symphypleona is proposed. In particular, a standard table of the appendicular chaetotaxy (antennae, legs, and furcula) is given. According to this presentation, the following species are redescribed: Lipothrix lubbocki (Tullberg, 1872), Gisinurus malatestai Dallai, 1970, Caprainea marginata (Schött, 1893), and Caprainea bremondi (Delamare & Bassot, 1957).

A standardized description of European Sminthuridae (Collembola, Symphypleona), 2: review of four species of the genera Allacma and Spatulosminthurus

Palavras-chave: Collembola; Symphypleona; Lipothrix; Gisinurus; Caprainea; Chaetotaxy; Taxonomy.

Ano: 1993

URL: http://www.repository.naturalis.nl/record/503891

According to our standard of the appendicular chaetotaxy, the following species are redescribed: Allacma fusca (Linné, 1758), Allacma gallica (Carl, 1899), Spatulosminthurus lesnei (Carl, 1899), and Spatulosminthurus betschi Nayrolles, 1990.

A standardized description of European Sminthuridae (Collembola, Symphypleona), 3: description of seven species of Sminthurus, including four new to science

Palavras-chave: Collembola; Symphypleona; Allacma; Spatulosminthurus; Taxonomy; Chaetotaxy; Europe.

Ano: 1994

URL: http://www.repository.naturalis.nl/record/503953

The following three species are redescribed: Sminthurus viridis (Linnaeus, 1758), Sminthurus nigromaculatus Tullberg, 1871, and Sminthurus multipunctatus Schäffer, 1896. Four new species are described from France and Spain: Sminthurus bourgeoisi n. sp., Sminthurus bozoulensis n. sp., Sminthurus leucomelanus n.sp.,and Sminthurus hispanicus n. sp. The importance of the ontogeny of chaetotaxy is stressed. Indeed, not all species acquire the secondary chaetotaxy in the same instar, and for these characters the most informative instar is not the adult but the third juvenile instar. The study of such characters involves the clustering of similar characters. A short discussion is given about this issue (selection of characters and clustering criteria).

Analysis of a species/instars/characters table: a theoretical survey on the use of chaetotaxy in ontophylogenetic studies

Palavras-chave: Collembola; Symphypleona; Sminthurus; Chaetotaxy; New species; Taxonomy; Ontogeny; France; Spain.

Ano: 1995

URL: http://www.repository.naturalis.nl/record/503948

Phylogenetic studies on several groups of arthropods, such as Acari (mites) or Collembola (springtails), make wide use of chaetotaxy. Chaetotaxic characters, besides being morphological features (setal shape), often have a binary nature, that is presence vs. absence. A seta can be variable in a population, and one may attribute a presence probability to this seta. In fact, the presence probability should be defined for each instar. One might think that a variable seta corresponds to a polymorphism (e.g., two or more alleles in a population); in fact, setal variability should be regarded as the result of a propensity intrinsic to individuals, i.e., a potentiality being expressed at random among specimens. The phenomenon known as lateral inhibition explains...