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Pilumnus hirsutus

 

 

PILUMNIDAE
bristle crabs

  Pilumnus hirsutus
Stimpson, 1858

Relevant Synonyms
-

Misidentification
-

 drawing : Tuvia Kurz    

SHORT DESCRIPTION
Carapace subhexagonal, convex, median groove anteriorly distinct. Carapace and pereopods closely tumentose; longer, stiff setae anteriorly on carapace, chelipeds and pereopods. Front third as wide as carapace, deflexed, bilobed, lobes slightly oblique, separated from inner orbital tooth by well-marked groove. Infra-orbital margin denticulate, inner angle spiniform. Antero-lateral margin, shorter than postero-lateral, with four spiniform teeth. Chelipeds unequal. Upper margin of cheliped merus bispinose, carpus and chela thickly covered with conical tubercles on upper and outer surface. Walking legs slender, medial and distal spines on dorsal margin of meri of walking legs 2-4.

color : carapace pale yellowish to light brick-red, cheliped fingers brownish.

common size :
CL 1 cm.

DISTINGUISHING CHARACTERISTICS
Carapace with four antero-lateral teeth, meri of walking legs with median spine in addition to distal spine on dorsal margin.

BIOLOGY / ECOLOGY
Poorly known.

habitat : stony Caulerpa and Halimeda bottom, shell, gravel, 20-33 m.


1st MEDITERRANEAN RECORD
Egypt, 1936.


DISTRIBUTION
Worldwide : Indo-West Pacific. Mediterranean : a single record from Egypt (Balss, 1936).

ESTABLISHMENT SUCCESS
Known from a single record.

speculated reasons for success :
-


MODE OF INTRODUCTION
Presumably via the Suez Canal.


IMPORTANCE TO HUMANS
None.


KEY REFERENCES

  • Balss H., 1936. Decapoda (with an appendix, Schizopoda, by C. Zimmer). Part VII in The Fishery Grounds near Alexandria. Fisheries Research Directorate Notes and Memoirs (Cairo), 15: 1-67.
  • Bouvier E. L., 1940. Décapodes Marcheurs. Faune de France, 37: 1-403.

FEEDBACK / COMMENTS TO AUTHORS
 



Last update of the species sheet:
November 2002

©ciesm 2002