Alpheus malleator Dana 1852
Creators: name: Pasinatto, Karmine
name: Mantelatto, Fernando L.
name: Terossi, Mariana
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Alpheidae
Alpheus
Alpheus malleator

description: Alpheus malleator Dana, 1852
Zoea I
Carapace length: 0.52 ± 0.03 mm (n = 10 larvae)
Cephalothorax (Fig. 2A, 2B): rostrum absent; pterygostomian spine present; eyes sessile.
Antennule (Fig. 2C): peduncle 2-segmented; endopod as a plumose seta; exopod with 4 terminal aesthetascs (1 more robust) and 1 terminal plumose seta.
Antenna (Fig. 2D): 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) 6-segmented with 11 plumose setae (2, 1, 2, 1, 1, 4), plus a medial tubercle in the proximal segment and 1 simple seta in the distal segment.
Mandible: palp absent.
Maxillule (Fig. 2E): coxa with 6 (1 medial simple, 3 terminal simple, 1 terminal serrulate plumose, larger in proximal region, 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. 2F): coxa with 2 medial simple setae; base bilobed, each lobe with 5 medial simple setae (median seta shorter); endopod with 3 medial (1 proximal and 2 distal) simple setae and 2 terminal long (1 simple and 1 plumose) setae, with microtrichia; exopod (scaphognathite) with 5 plumose setae, with microtrichia.
First maxilliped (Fig. 2G): 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 + 1 lateral + 2 terminal) and 1 terminal serrulate] setae; exopod 4-segmented with 0, 0, 2, 2 terminal natatory plumose setae plus 1 lateral proximal simple seta on third segment.
Second maxilliped (Fig. 2H): coxa without setae; base with 4 medial simple setae arranged 1+2+1; endopod 4-segmented with 1 medial distal simple, 0, 1 medial distal serrulate seta, 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. 2I): coxa with 1 medial distal simple seta; base with 1 medial simple seta; endopod 4segmented with 0, 0, 3 (2 medial proximal and 1 lateral distal), 3 (2 lateral and 1 terminal) simple setae; exopod 4-segmented with 0, 2, 2, 2 terminal natatory plumose setae plus 2 (1 medial and 1 lateral) simple setae on second segment.
Pereopod (Fig. 2J): first as a biramous bud.
Pleon (Fig. 2A, 2K): with 5 somites, presence of simple dorsal setae on the somites (Figs. 2L, 3A, 3D, 3E, 3F); lateral spines absent; pleopods absent; anal spine present (Fig. 2M).
Telson (Fig. 2M): 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.
description: Published as part of Pasinatto, Karmine, Mantelatto, Fernando L. & Terossi, Mariana, 2020, First zoeal stage of the snapping shrimps Alpheus formosus Gibbes, 1850 and Alpheus malleator Dana, 1852 (Caridea: Alpheidae), with new characters to the genus, pp. 540-550 in Zootaxa 4820 (3) on pages 542-546, DOI: 10.11646/zootaxa.4820.3.7, http://zenodo.org/record/4441079