plastron


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

plas·tron

(plas'tron),
The sternum with costal cartilages attached.
[Fr. a breastplate]

plastron

(plăs′trŏn) [Fr., breastplate]
The sternum and attached cartilages.

plastron

  1. the film of air covering parts of the body in aquatic insects such as water beetles, which enables them to stay under water. The film acts as a gill since gas exchange takes place between the water and the air bubble (plastron respiration).
  2. the horny bridge connecting the sides of the carapace below the body of tortoises and turtles.
References in periodicals archive ?
costarricensis has been varnished in a manner similar to that commonly done by commercial collectors of White River Group fossils; and (2) the preservation of the specimen, as a three-dimensional, nearly complete carapace and plastron filled with matrix, is also a characteristic preservation of White River Group tortoise fossils.
Caption: Plastron (bottom shell) patterns of two adult Blanding's turtles
Cuello bajo, abierto, volcado, corbata plastron con perla o con brillantes.
El plastron fue aproximado empleando resina acrilica autopolimerizable de metilmetracrilato (Fig.
The animals were weighed and measured following body biometric parameters, such as, carapace length (CL), which corresponds to the measurement between the first dorsal marginal shields (or nuchal) until the suture of the last dorsal marginal shields (or supracaudals); carapace width (CW) is the distance between the 6th and 7th dorsal shield from side to side; plastron length (PL) corresponds to dorsal measurements, or rather, from the anterior edge of intergular shield until the posterior point of the suture of anal shields; plastron width (PW), which corresponds to the most ventral lateral distance between the points of insertion of the pectoral and abdominal shields with the right and left marginal shields.
Parochlus carolinae pupa has a strongly indicated horn sac of the thoracic horn, reaching 0.27-0.36 the length of the plastron plate.
Three wounds are in the carapace and one in the plastron. The turtle has no existing tag.
The carapace and the plastron of these endangered turtles is dried and powdered and then sold off to Bangladesh and South East Asian countries for use in traditional Chinese medicine.
A projector connected to a computer with an external programmable card projected a black circle (the target), 0.1 m in diameter onto the geometric center of a white screen of 0.7 x 0.55 m, which acted as a plastron. The geometric center of the screen was situated at a height corresponding to 70% of the height of the fencer.