• Donax deltiodalis

• Donax faba
  (Gmelin, 1791)

Pacific Bean Donax

Half-striated donax

• Donax trunculus
  (Lamarck, 1818)

Truncate donax

• Donax variegatus (Gmelin, 1791)

Freshwater Donax from Africa

Request for information: July 29, 2006

Dear colleague,

Being a mammalogist with a modest past in malacology (taxonomy of Australian Nuculidae and Philobryidae), I am returning to malacology to find information on the occurrence of the 14 known Egeria species (Donacidae), which occur only in estuaries and lower river ranges near sea on the western side of Africa, from Senegal to Angola, and are consumed by local people in several countries. The reason for my search is my wish to find out about responsible and sustainable ways of fishing these bivalves. In Congo (-Kinshasa) people diving for them all develop eye and ear problems when doing this for a longer time.

The genus is very poorly known. Nine of the 14 species are based on shells of unknown provenance, to mention one of the problems.

I would much appreciate data which people might have, especially species/locality data, preferably dated, and collections holding Egeria.

Dr. Wim Bergmans: Email: bergmanswim@kpnplanet.nl

• Egeria tenuicula langi
  (Pilsbry and Bequaert, 1927)
  

• Egeria Congica
  (Boettger, 1818)

• Arctica islandica

black clam

• The Icelandic cyprine is found around all British and Irish coasts.

• Species List:
  
• Family Description

• Pleuroploca gigantea
  (Kiener, L.C., 1840)

Florida Horse Conch

• People in the Yucatan peninsula call Triplofusus giganteus pepperconch
• Pleuroploca gigantea has a peppery taste. The meat needs to be tenderized
• it is often used in chowders

• Species List: Hardy's Guide
• URL
• URL

• Fissurella crassa
  (Lamarck, 1822)

Thick Keyhole Limpet

• Fissurella costata
  (Lesson, R.P., 1830)
  

Costate Keyhole Limpet

• Fissurella cumingi
  (Reeve, L.A.,1849)

• Study

• Fissurella latimarginata
  (Sowerby, G.B. I, 1835)

• Study

• Fissurella maxima
  (Sowerby, 1835)

• Fissurella nigra
  (Lesson, R.P., 1830 )
  

Black Keyhole

• Fissurella picta
  (Gmelin, 1790
  

Painted Keyhole Limpet

• Species List
• Species List

• Glycymeris bimaculata (Polish, 1795)

Two-spotted bittersweet; Es: Almendra rayada; Fr: Amande à deux taches

• Other scientific names still of use :
  • Glycymeris gaditanus (Gmelin, 1791)
  • Glycymeris insubrica (Brocchi, 1814)
  • Glycymeris nummaria (Linnaeus, 1758)

• URL

• Nepycnodonte cochlear
  (Polish, 1795)

• Other scientific names used: Pycnodonta cochlear (Polish, 1795)
• A fragile deep water species in the suborder Ostreina. Usually caught accidently in fish traps.