Species ID
OC-SP-0002256
Discovered
Phylum
Arthropoda
Species ID
OC-SP-0002256
Provisional Species Name
Synalpheus sp5
Lowest Valid Taxon Name in WoRMS
Synalpheus
Lowest Known Rank
Genus
Status
Discovered
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Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda
Family
Alpheidae
Genus
Synalpheus
Taxonomic Remarks
Synalpheus sp.5 belongs to the S. neptunus (Dana, 1852) complex. The members of this complex inhabit the Indo-West Pacific waters, and are characterized by I) presence of orbitorostral process, II) relatively short rostrum, and orbital teeth reaching approximately the mid-length of the first antennular article, III) third maxilliped bearing a crown of 6-8 slender spiniform setae, IV) minor cheliped fingers spatulate, with rows of setae along the lateral margins, V) dactylus of walking pereiopods (3-5) biunguiculate, VI) telson lacking triangular projections on the posterolateral margins. Within the complex, Synalpheus sp.5 is distinguished by the following characters: 1) rostrum slender, slightly shorter than or subequal with the orbital teeth, 2) orbital teeth relatively slender, subacute at tip, approximately twice as broad as the rostrum, 3) stylocerite reaching the distal margin of the first antennular article, 4) scaphocerite with blade slightly reduced, 5) basicerite bearing a prominent subacute projection on the superior margin, 6) major cheliped palm with small slightly upturned subconical tooth above the dactylar articulation, 6) fifth pereiopod coxa in males armed with a prominent subconical projection, 7) pleura of pleon sexually dimorphic, with male first pleuron angulate anteroventrally and bearing a hook-shaped projection posteroventrally, second bearing small projection posteroventrally, third to fifth pleura bearing prominent projection posteroventrally 8) diaeresis present, with a notch at mid-width of the exopod.
Received All Minimal Data for Discovery
02/03/2026
Ecology
This species is communal and was collected from sponges. The live colour pattern of this species is unknown.
Distribution
North Sulawesi, Indonesia
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