Bonellia

Bonellia

 

a genus of invertebrate animals of the class Echiuroidea of the subkingdom Articulata. There are several species, none of which are found in the waters of the USSR. The members of the species B. viridis have a sharply expressed sexual dimorphism. The body of the female is cylindrical (up to 7 cm long), and it has a long proboscis, divided into two parts at the end, which serves to grip soil along with bits of food (vegetable remains). A special pigment gives it a green color, which is protective. The body of the male is not more than 1–3 mm long and has a very simple structure. It lives as a parasite in the sexual ducts of the female; this fact was first discovered by the Russian scientist A. O. Kovalevskii in 1870. The species B. viridis is widely distributed in the coastal region of the Mediterranean Sea and in the Atlantic Ocean near the coast of Europe. It lives in shallow waters in the hollows formed in stones.

References in periodicals archive ?
Bonellia viridis: Agius and Jaccarini, 1981; Urechis uncinatus: Kazama et al, 2005; Thalassema mellita: Conn, 1886; Torrey, 1903).
Development of pigment in the echiuran worm Bonellia viridis.
En los BOES la altura de los arboles es mayor que en los MAES y algunas plantas que son arbustivas en estos ultimos aparecen como arboles en los BOES (por ejemplo: Erythrina flabelliformis, Haematoxylum brasiletto y Bonellia macrocarpa ssp.
Some aspects of the Echiuran worm Bonellia Viridis and associated fauna.
This is seen in the echiurian Bonellia viridis (Berec et al.
Sex determination in Bonellia viridis (Echiura: Bonellidae): population dynamics and evolution.
Novel aspects of the nervous system of Bonellia viridis (Echiura) revealed by the combination of immunohistnehemis-try.
Immunohistochemical analysis of the nervous system in developmental stages of Bonellia viridis.
We also compare the occurrence of dwarf males in Osedax with other animals (Ghiselin, 1974; Vollrath, 1998), particularly with the annelid echiuran Bonellia, which is known to have environmentally determined sex (Agius, 1979).
Evidence for predetermination is seen in Bonellia viridis.