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MICROPYGOUS [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1977-09-08

English

Subject field(s)
  • Paleontology
OBS

[Discoidal enrollment is] characteristic of certain progressive micropygous and isopygous... [trilobites. In this mode] the thorax folds together in halves like a closing book. The flexion of the thorax is differential, being maximum in a comparatively short anterior stretch that acts as a sort of hinge, whereas it is very slight or none at all along the posterior segments.

French

Domaine(s)
  • Paléontologie
OBS

Dans le «mode [d'enroulement] discoïde» [...], le thorax [d'un Trilobite] se replie simplement en deux, comme un livre que l'on ferme, entraînant le pygidium qui vient s'appliquer contre la partie inférieure du céphalon. Il n'y a flexion du rachis que dans la zone de reploiement (= charnière d'enroulement) [...]; les extrémités de toutes les plèvres augmentent néanmoins leur courbure.

Spanish

Save record 1

Record 2 1977-09-07

English

Subject field(s)
  • Paleontology
OBS

[Double enrollment is] characteristic of some primitive micropygous Cambrian trilobites(...) In this mode(...) the posterior thoracic segments bend together with the small pygidium under the thorax, and then the main part of the thorax rolls up according to the spheroidal mode. As a result the dorsal side of the pygidium and last few thoracic segments come in contact with the cephalic doublure, the anterior cephalic margin touching one of the rear thoracic rings(...)

French

Domaine(s)
  • Paléontologie
OBS

Dans l'"enroulement double (...), le pygidium [d'un Trilobite], accompagné d'un nombre variable de segments thoraciques, commence par se replier sur la face ventrale du thorax, puis ce dernier se ploie à son tour en enfermant totalement le pygidium et les derniers anneaux thoraciques entre lui-même et la tête dont le bord antérieur est alors en contact, non pas avec le bord pygidial, comme dans le mode (...) [sphéroïde], mais avec l'un des segments thoraciques postérieurs (...). La flexion du thorax s'opère suivant le mode sphéroïde et le corps prend une forme spiralée (...)

Spanish

Save record 2

Record 3 1977-09-06

English

Subject field(s)
  • Paleontology
OBS

[The term micropygous is said of a trilobite] Having a small pygidium.

French

Domaine(s)
  • Paléontologie
OBS

Les Trilobites à petit pygidium sont dits "micropyges"; (...)

Spanish

Save record 3

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