The Nautilus Log
Prototyphis eos

Prototyphis eos

NamePrototyphis eos
Scientific NamePrototyphis eos
Common NameEos Murex
FamilyMuricidae
GenusPrototyphis
Specieseos
Geographic DistributionIndo-Pacific region, including areas such as the Philippines and Indonesia.
Shell Shapefusiform
Average Size (mm)15-30
Identifying FeaturesKey features include the prominent, often frilled or fimbriated varices (though not clearly visible due to encrustation in this image), a long siphonal canal, and an aperture with internal denticles on the outer lip. The overall robust and angular shell morphology is characteristic. The visible operculum or part of the animal inside the aperture is orange-brown.
Raritycommon
Author CitationHabe & Kosuge, 1971

Description

A small to medium-sized marine predatory gastropod, commonly known as an Eos Murex. Its shell is robust, characterized by a rough, nodulose or spiny exterior, often heavily encrusted with marine growth, as seen in the image. It features a prominent siphonal canal and an aperture that typically displays internal denticles on the outer lip. The specimen in the image exhibits a dull greenish-brown coloration, likely providing camouflage within its natural habitat.

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