(escargots)

Toutes ces informations ont pour origine les sites de Gerald DEPAUS et Stijn GHESQUIERE ( voir remerciements et les meilleurs sites aqua-terra(riophiles) ).

Nous allons rentrer dans le monde étrange des mollusques gastropodes pulmonés vivant en Amérique du Sud.

Quelques photos pour vous présenter le genre le plus rencontré en Amazonie, le Pomacea , Alosene.

 

Characteristics of the genus Pomacea:

 

Pomacea urceus

Shell:
surface: smooth to rough (growth lines), sometimes malleation
shape: cone-shaped, ovoid to almost discoidal
direction: right (dextral)
whorls: round
shell-opening (aperture): oval
umbilicus: narrow to wide
colour: yellow, dark brown to almost black, with or without spiral bands
Operculum: corneous

Body:
head (cephalic) tentacles: long
labial tentacles: long
breathing siphon: long (2.5 times body length)
colour: grey to yellow-grey with or without darker spots
Eggs: above the waterline

 

Liste regroupant quelques espèces du genre Pomacea.

genre ; espèce ; Species Authority ; Species Authority Date ; pays ; état ; localisation ; collecteur ; date de collecte

Pomacea baeri Dautzenberg Peru Huánuco Depto. ditch, 23.4 km. SSE Aucayacu 650 mPomacea No Colombia Amazonas Depto. Leticia, ditch N Tarpon Zoo R. M. Shelley 6 Jul
Pomacea haustrum Reeve 1856 Peru Rio Caterpiza, Quebrada ca. 2 hours above Caterpiza R. W. McDiarmid 6 Feb 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Caterpiza, quebrada ca. 2 hours above Caterpiza R. W. McDiarmid 6 Feb 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Santiago, Galilea in cocha in village R. W. McDiarmid 30 Jan 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Caterpiza? R. W. McDiarmid
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Santiago, Galilea in cocha in village R. W. McDiarmid 30 Jan 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. small quebrada, tributary to Rio Santiago, at Galilea R. W. McDiarmid 27 Jan 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Caterpiza, quebrada ca. 2 hours above Caterpiza R. W. McDiarmid 6 Feb 1980
Pomacea haustrum Reeve 1856 Peru Loreto Depto. Santa Maria, village 3 mi downstream from Iquitos, on bank of Amazon R. C. Coulson 19 Jul 1969
Pomacea haustrum Reeve Peru Amazonas Depto. Rio Caterpiza, from small cocha upstream from Caterpiza R. W. McDiarmid 7 Feb 1980
Pomacea urceus guyanensis Lamarck Peru Amazonas Depto. Rio Santiago, Galilea in cocha in village R. W. McDiarmid 30 Jan 1980
Pomacea lineata Spix 1827 Brazil Bahia Pomacea nais Pain No Peru Amazonas Depto. Rio Santiago, vicinity Galilea D. J. Stewart 17 Mar 1980
Pomacea haustrum Reeve 1856 Bolivia Santa Cruz Depto. Chiquitos Prov., 3 km. SSW Robere, Rio Robere 300 m. F. G. Thompson 1 Dec 1982
Pomacea luteostoma Swainson Brazil Rio Grande Nord RIO MOSSORO G. A. Waring
Pomacea handleyana Alder Brazil Para Estado BELEM
Pomacea haustrum Reeve Brazil Pomacea insularum Orbigny No Paraguay VILLARICA
Pomacea insularum Orbigny Brazil
Pomacea lineata Spix Brazil AMAZON RIVER
Pomacea amazonica Reeve Yes Brazil Amazona Estado. AMAZON RIVER A. M. Olalla
Pomacea papyracea Spix Brazil AMAZON RIVER Pomacea lineata Spix Brazil Maranhao
Pomacea figulina Spix Brazil PAPAPARAY ESTREMOZ
Pomacea gigas Spix Brazil AMAZON RIVER, LAGO BAPTISTA
Pomacea gigas Spix Brazil AMAZON RIVER Pomacea gigas Spix Yes Brazil

 

 

 

Characteristics of the genus Asolene:

Asolene spixi

Shell:
surface: smooth or malleated
shape: egg-shaped, globose
direction: right (dextral)
whorls: round base with flat upper part
shell-opening (aperture): round base, pointed top
umbilicus: narrow to wide
colour: yellow to brown with faint spiral bands
Operculum: corneous

Asolene spixi

Body:

head (cephalic) tentacles: medium (less then shell diameter)
labial tentacles: medium
breathing siphon: hort to almost non-existing
colour: gray
Eggs: aquatic