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Révision des Diplorhoptrum de France, Fourmis Plus Différenciées par l'Écologie Que par Leurs Formes. [Hym. Formicidae]

Révision des Diplorhoptrum de France, Fourmis Plus Différenciées par l'Écologie Que par... Summary The taxonomy of Diplorhoptrum, is difficult, owing to their excessive variability. To distinguish the most constant characters, they are studied on 200 ☿ of each of the following species: D. banyulensis, pygmaeum, delta, n. sp. and pilosum, n. sp. On every worker are measured: lenght and breadth of the head, distance and length of clypeal teeth, hight and length of the mediary segment. The most variable are the clypeal teeth, not to use in future systematics. Chapter II describes the relative growths of head breadth and clypeal teeth, compared to head length. Means of groups of 10-12 ☿ are considered. The curves obtained, in logarithmic ordinates, varies much according to each species, D. banyulensis being the most pecular. Chapter III is ecological. In squares of 100 m2, the nests are counted, also the number of perennial and herbaceous plants, the slide and altitude of the ground. The results conducts to separe a xerophile group (D. banyulensis, nicaeensis, etc.) from a rather hygrophile group (D. pygmaeum, monticola, pilosum…), advantaged by numerous herbaceous plants (more than 2000 in the square), often also by shadow, thick and moisty humus, etc. The most acid rocks (Esterel) advantages D. pygmaeum, but banyulensis is lacking here, prefering schistes or calcareous rocks. 4 new species: D. delta and avium from Camargue, D. insulare from Port-Cros and D. pilosum from northern Maritime Alps, are described, also the males and females of D. pygmaeum, discovered in Camargue. Dichotomic tables are tried for the three castes. One knows already, in France, 20 species for ☿, 14 for females and 15 for males. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annales de la Société entomologique de France (N S ) Taylor & Francis

Révision des Diplorhoptrum de France, Fourmis Plus Différenciées par l'Écologie Que par Leurs Formes. [Hym. Formicidae]

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Publisher
Taylor & Francis
Copyright
© 1977 Société entomologique de France
ISSN
2168-6351
eISSN
0037-9271
DOI
10.1080/21686351.1977.12278659
Publisher site
See Article on Publisher Site

Abstract

Summary The taxonomy of Diplorhoptrum, is difficult, owing to their excessive variability. To distinguish the most constant characters, they are studied on 200 ☿ of each of the following species: D. banyulensis, pygmaeum, delta, n. sp. and pilosum, n. sp. On every worker are measured: lenght and breadth of the head, distance and length of clypeal teeth, hight and length of the mediary segment. The most variable are the clypeal teeth, not to use in future systematics. Chapter II describes the relative growths of head breadth and clypeal teeth, compared to head length. Means of groups of 10-12 ☿ are considered. The curves obtained, in logarithmic ordinates, varies much according to each species, D. banyulensis being the most pecular. Chapter III is ecological. In squares of 100 m2, the nests are counted, also the number of perennial and herbaceous plants, the slide and altitude of the ground. The results conducts to separe a xerophile group (D. banyulensis, nicaeensis, etc.) from a rather hygrophile group (D. pygmaeum, monticola, pilosum…), advantaged by numerous herbaceous plants (more than 2000 in the square), often also by shadow, thick and moisty humus, etc. The most acid rocks (Esterel) advantages D. pygmaeum, but banyulensis is lacking here, prefering schistes or calcareous rocks. 4 new species: D. delta and avium from Camargue, D. insulare from Port-Cros and D. pilosum from northern Maritime Alps, are described, also the males and females of D. pygmaeum, discovered in Camargue. Dichotomic tables are tried for the three castes. One knows already, in France, 20 species for ☿, 14 for females and 15 for males.

Journal

Annales de la Société entomologique de France (N S ) – Taylor & Francis

Published: Oct 31, 1977

Keywords: Hyménoptères; Formicidae; Diplorhoptrum révision

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