''Alpheus digitalis'' is a species of pistol shrimp in the family Alpheidae. The species was first discovered after a taxonomic study of a snapping shrimp from the genus Alpheus from

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

and the

Gulf of Thailand The Gulf of Thailand, also known as the Gulf of Siam, is a shallow inlet in the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. It is around in l ...

, of which, it was found that two species was confounded under ''A.digitalis'', which was originally described based on a single specimen possessing abnormal chelipeds.

Differences between ''A. digitalis'' & ''A.longiforceps''

Between the two species, the most unique difference is coloration and morphology. ''A.longiforceps,'' the new species, can be differentiated from ''A.digitalis'' by the more slender (rather than connex), flexor margin, the longer male minor chela, more elongate dactylus, possession of a single (rather than two), obliquely transverse white bands on the spot which is located on the lateral surface of the fourth abdominal region. The present day new species is referred to the ''Alpheus brevirostris'' species group, mainly because of the compressed palm of the major cheliped and the subpatulate ductylus of the pereiopods 3 and 4.

References

{{Taxonbar, from=Q4474074 Alpheidae Crustaceans described in 1844

Differences between ''A. digitalis'' & ''A.longiforceps''

See also

References