Alpheus rapacida De Man, 1908

Clark, Paul F., Ng, Peter K. L., Fransen, Charles H. J. M., McLaughlin, Patsy A., Dworschak, Peter C. & Baba, Keiji, 2008, A checklist of Crustacea Decapoda collected from Conic Island Cave and adjacent areas of Hong Kong, Journal of Natural History 42 (9 - 12), pp. 913-926 : 914-915

publication ID	https://doi.org/ 10.1080/00222930701850570
persistent identifier	https://treatment.plazi.org/id/731DB95B-FFF7-FFC0-C7BB-AD9A8778FE6C
treatment provided by	Felipe
scientific name	Alpheus rapacida De Man, 1908
status

Treatment

Alpheus rapacida De Man, 1908 View in CoL

Material examined

Conic Island Cave, 22 ° 219540 N 114 ° 239220E, Hong Kong; 1 specimen (CL. 3.1 mm), ( RMNH D 50577), coll. 25 October 2002 .

Hoi Ha Wan, 22 ° 28947.43.0 N 114 ° 20908.80E, Hong Kong; 1 specimen , coll. 26 October 2002, 16m.

Remarks

This alpheid is part of the A. brevirostris species group that has no transverse groove on the upper border of the palm of the large chela. Its major chela is about four times longer than broad, the carapace is smooth, and the third, fourth and fifth pereiopods have long spatulate dactyli. In the key to the Indo-West Pacific alpheid shrimps of the brevirostris species group provided by Bruce (1994, 23), the specimen keys out with A. rapacida De Man, 1908 . Alpheus rapacida is known throughout the tropical Indo-West Pacific, living in self-made burrows on sandy and muddy bottoms in depths of 5 to 56 m.

The present specimen differs from the description of A. rapacida by De Man (1908, 1911) in having the first and second carpal segments of the second pereiopods of equal length while in A. rapacida the second carpal segment is 1.2 times longer than the first.