Alpheus formosus Gibbes, 1850
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publication ID |
https://doi.org/ 10.11646/zootaxa.4820.3.7 |
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publication LSID |
lsid:zoobank.org:pub:F8E35652-BC07-4FFA-87CF-20E9181FF22B |
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DOI |
https://doi.org/10.5281/zenodo.4441131 |
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persistent identifier |
https://treatment.plazi.org/id/03DE87B9-FFF9-FF89-C6F0-F8BE9DF37799 |
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treatment provided by |
Plazi |
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scientific name |
Alpheus formosus Gibbes, 1850 |
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Alpheus formosus Gibbes, 1850 View in CoL
Zoea I Carapace length: 0.42 ± 0.04 mm (n = 10 larvae)
Cephalothorax ( Fig. 1A, 1B View FIGURE 1 ): rostrum absent; pterygostomian spine present; eyes sessile.
Antennule ( Fig. 1C View FIGURE 1 ): peduncle 3-segmented; endopod as a plumose seta; exopod with 4 terminal aesthetascs (2 spatulate, one of them being more robust) and 1 terminal plumose seta.
Antenna ( Fig. 1D View FIGURE 1 ): peduncle 2-segmented with 1 medial distal spiniform projection near the endopod; endopod with 1 terminal plumose seta and 1 medial distal spiniform projection; exopod (scaphocerite) 8-segmented with 11 plumose setae (2, 1, 2, 1, 1, 1, 1, 2), distal segment with 1 simple seta.
Mandible: palp absent.
Maxillule ( Fig. 1E View FIGURE 1 ): coxa with 6 (1 medial simple, 3 terminal simple, one larger in proximal region, 1 terminal serrulate plumose, 1 lateral simple) setae; base with 2 spiniform projections and 1 lateral simple seta; endopod with 1 terminal plumoserrulate and 1 lateral simple setae; exopod absent.
Maxilla ( Fig. 1F View FIGURE 1 ): coxa with 2 medial simple setae; base bilobed, each lobe with 5 medial simple setae (distal seta longer); endopod with 1 medial proximal simple and 2 terminal long (1 simple and 1 plumose) setae, with microtrichia; exopod (scaphognathite) with 5 plumose setae, without microtrichia.
First maxilliped ( Fig. 1G View FIGURE 1 ): coxa with 1 medial distal simple seta; base with 7 medial simple setae arranged 2+2+2+1; endopod 2-segmented with 1 medial distal simple seta, 5 [4 simple (1 medial + 3 terminal) and 1 terminal serrulate] setae; exopod 4-segmented with 0, 0, 2, 2 terminal natatory plumose setae plus 1 lateral distal simple seta on second segment.
Second maxilliped ( Fig. 1H View FIGURE 1 ): coxa without setae; base with 4 medial simple setae arranged 1+1+1+1; endopod 4-segmented with 1 medial distal simple, 0, 1 medial distal serrulate, 5 (1 medial simple, 3 lateral simple and 1 terminal serrulate) setae; exopod 4-segmented with 0, 1, 2, 2 terminal natatory plumose setae plus 1 terminal simple seta on second segment.
Third maxilliped ( Fig. 1I View FIGURE 1 ): coxa with 1 medial distal simple seta; base with 2 medial simple setae arranged 1+1; endopod 5-segmented with 0, 1 medial, 0, 3 (2 lateral proximal and 1 medial distal), 3 (2 medial proximal and 1 terminal) simple setae; exopod 5-segmented with 0, 0, 2, 2, 2 terminal natatory plumose setae plus 1 medial simple seta on second segment.
Pereopod ( Fig. 1J View FIGURE 1 ): first as a biramous bud.
Pleon ( Fig. 1A, 1K View FIGURE 1 ,): with 5 somites, presence of simple dorsal setae on the somites ( Figs. 1L View FIGURE 1 , 3B, 3C View FIGURE 3 ); lateral spines absent; pleopods absent; anal spine present ( Fig. 1M View FIGURE 1 ).
Telson ( Fig. 1M View FIGURE 1 ): triangular, with 7+7 (5 inners plumose, 2 outers plumose laterally) setae, 4 inner setae with shorter setules in the proximal region, inner pair shorter; 6 inner pairs with a row of denticles in the distal margin, 4 innermost pairs with marginal spines ( Fig. 3G, 3H View FIGURE 3 ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.