Species ID
OC-SP-0002248
Discovered
Phylum
Arthropoda
Species ID
OC-SP-0002248
Provisional Species Name
Salmoneus sp2
Lowest Valid Taxon Name in WoRMS
Salmoneus
Lowest Known Rank
Genus
Status
Discovered
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Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Family
Alpheidae
Genus
Salmoneus
Taxonomic Remarks
Salmoneus sp.2 belongs to the Salmoneus arabicus Anker, 2022, species complex. This complex is characterized as in follow: Carapace fully or partly covering eyes in both dorsal and lateral views. Rostrum broadly triangular, with obsolete carina in its anterior half, lateral margin straight or nearly straight, without concavity or convexity, almost reaching distal margin of second article of antennular peduncle. Telson with posterior margin bearing shallow median notch and armed with two pairs of spiniform setae, mesial stouter and longer than lateral. Antennule relatively stout; stylocerite reaching to distal margin of second article. Antennal scaphocerite broad, reaching to end of antennular peduncle. Third maxilliped with lateral plate subquadrate, with rounded angle laterally; arthrobranch reduced to various degrees. Chelipeds (= first pereiopods) asymmetrical in size and shape, with minor cheliped significantly weaker than major cheliped; ischium of both chelipeds armed with one (rarely two) spiniform seta on ventrolateral surface; major chela with shallow depression on mid-dorsal margin of palm; fingers slightly crossing near tips; dactylus and pollex with cutting edges armed with evenly distributed teeth, teeth near mid-length largest, decreasing in size towards both proximal and distal ends. Third and fourth pereiopod ischia armed with two to four spiniform setae on ventrolateral surface; fifth pereiopod propodus with reduced grooming brush, usually with 1–2 microserrulate setae per row, 3 setae at most. Within this complex, S. sp.2 can be separated by 1) presence of minuscule post-rostral tubercle, 2) smooth ventro-subdistal margin of rostrum, 3) rounded lateral plate of the third maxilliped, 4) remarkably reduced arthrobranch, 5) ventrodistal margin of meri of minor cheliped as well as second to fifth pereiopods without any process, 6) disto-ventral margin of the fifth pereiopod carpus armed with spiniform seta.
Received All Minimal Data for Discovery
02/03/2026
Description of Material
Carapace moderately setose, fully concealing eyes in dorsal and lateral views, with minute postrostral tubercle. Rostrum triangular, as long as wide, with faint dorsal carina in anterior half; tip reaching mid-length of second article of antennular peduncle; ventral margin straight, unarmed. Orbital teeth well developed, pointed somewhat mesially. Sixth pleonite with incomplete posteroventral suture. Telson slender, tapering; posterior margin with small central notch furnished with two long plumose setae, lateral spiniform setae about 0.7 length of mesial spiniform setae. Second article of antennular peduncle wider than long. Third maxilliped with rounded lateral plate; arthrobranch reduced. Chelipeds strongly unequal in size and asymmetrical in shape. Major cheliped with one spiniform seta on ischium; chela moderately swollen, with complex groove proximally; cutting edge of pollex armed with 13–14 teeth, that of dactylus with 11–12 teeth. Minor cheliped with one spiniform seta on ischium; chela slightly shorter than carpus, not enlarged; finger cutting edges unarmed. Second pereiopod with one spiniform seta on ischium; carpus with first subarticle equal in length to sum of others. Third pereiopod with ischium armed with three spiniform setae on ventrolateral surface. Fifth pereiopod with propodus armed with 11 spiniform setae along ventral margin and one pair of distal spiniform setae adjacent to dactylus, distodorsal margin of propodus with small spiniform seta.
Ecology
Specimens were found under coral rubble.
Distribution
Papua New guinea
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