Hyppolyte leptocerus Heller 1863
Creators: name: Guerao, Guillermo
name: Hernández, Esteban
name: Urzúa, Ángel
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Hippolytidae
Hyppolyte
Hyppolyte leptocerus

description: Hyppolyte leptocerus (Heller, 1863)
(Figs 1 B–7)
Zoea I. Size. TL= 1.33–1.36 mm; CL = 0.49–0.51 mm.
Carapace (Figs. 2 A,B). Eyes sessile, with a single minute median tubercle. Rostrum long, directed slightly downward, exceeding the anterior margin of scaphocerite. Pterygostomial spine present with 2 small spines posteriorly. Supraorbital spines absent.
Antennule (Fig. 2 C). Peduncle unsegmented, without setae. Inner flagellum (endopod) represented by a long plumose seta; outer flagellum unsegmented with 4 terminal aesthetascs.
Antenna (Fig. 2 D). Birramous, peduncle (protopod) with a distal spine on inner magin. Endopod slender unsegmented, slightly more than ½ length of exopod and with 6 spines on inner side. Exopod (scaphocerite) 3-segmented with 10 (5, 1, 4) plumose setae, plus 1 short simple seta on the distal segment.
Mandible (Fig 2 E, F). Asymmetrical; incisor and molar processes differentiated. Mandibular palp absent. Left mandible with lacinia mobilis near incisor process. Rigth mandible with 2 teeth between incisor and molar processes.
Maxillule (Fig. 2 G). Coxal endite with 7 setae and basial endite with 7 spinous setae. Endopod unsegmented, with 5 terminal setae. Outer plumose seta (exopodal seta) present.
Maxilla (Fig. 2 H). Coxa bilobed, with 7–8 + 3–4 setae. Basial endite bilobed with 5 + 4 setae. Endopod unsegmented and bilobed with 3 + 5 setae. Exopod (scaphognathite) with 5 marginal plumose setae.
First maxilliped (Fig, 3A). Coxa and basis with 5 and 12 setae on inner margin respectively. Endopod 4-segmented, with 3, 1, 2, 4(1 + 3) setae. Exopod incompletely 3-segmented with 4 long plumose natatory setae (one subterminal and 3 terminal).
Second maxilliped (Fig. 3 B). Coxa and basis with one and 8 setae on inner margin respectively. Endopod 4- segmented, with 3, 2, 2, 5(1 + 4) setae. Exopod incompletely segmented with 5 long plumose natatory setae (2 subterminal and 3 terminal).
Third maxilliped (Fig. 3 C). Protopod with 2 inner setae. Endopod 4-segmented, with 1, 0, 2, 4(1 + 3) seate. Exopod incompletely segmented with 5 long plumose natatory setae (2 subterminal and 3 terminal).
Pereiopods. Absent.
Pleon (Figs. 2 A, B). Five somites plus telson, without pleopods and uropods. Pair of posterolateral spines on somite 5. Anal papilla present.
Telson (Figs. 2 A,B, 3D). Triangular with a shallow median cleft posteriorly and 7 + 7 setae of different sizes, two outer pairs of setae feathered only on their inner side. Minute spinules present on posterior margin.
Zoea II. Size. TL= 1.55–1.57 mm; CL= 0.55–0.60 μm
Carapace (Figs. 4 A, B). Eyes stalked.
Antennule (Fig. 4 C). Peduncle incompletely segmented, with 2 distal setae on basal segment. Distal segment with 4 setae.
Antenna (Fig. 4 D). Scaphocerite with tendency to lose segmentation. Otherwise unchanged.
Mandible. Unchanged
Maxillule (Fig. 4 E). Unchanged.
Maxilla (Fig. 4 F). Coxa bilobed, with 8 + 4 setae. Basial endite bilobed with 5 + 5 setae. Exopod (scaphognathite) with 7 plumose marginal setae.
First maxilliped (Fig. 5 A). Basis with 14 setae on inner margin. Exopod with one subterminal and 4 terminal long plumose natatory setae.
Second maxilliped (Fig. 5 B). Endopod 5-segmented, with 2, 2, 0, 2, 6(1 + 5) setae. Exopod with 2 subterminal and 4 terminal long plumose natatory setae.
Third maxilliped (Fig. 5 C). Protopod (basis) with 3 inner setae. Endopod 5-segmented, with 1, 1, 0, 2, 5(1 + 4) seate. Exopod with 2 subterminal and 4 terminal long plumose natatory setae
Pereiopods. First pereiopod present as a bud.
Pleon (Figs. 4 A, B). Unchanged.
Telson (Figs. 4 A,B, 5D). Posterior margin with 8 + 8 setae of different sizes. Outer pair of setae feathered only on their inner side.
Zoea III. Size. TL= 1.70–2.00 mm; CL = 0.65–0.70 mm.
Carapace (Figs. 6 A, B, C). Anteroventral margin with 3 small spines posteriorly to pterygostomial spine.
Antennule (Fig. 6 D). Peduncle 3-segmented. Proximal segment bearing a small lateral spine and without setae; second segment with 3 + 2 setae; distal segment with 5 setae. Flagellum with 2 aesthetascs and one seta.
Antenna (Fig. 6 E). Exopod (scaphocerite) unsegmented, with a distolateral spine.
Maxillule (Fig. 6 F). Basial endites with 8 setae.
Maxilla (Fig. 6 G). Coxa bilobed, with 10 + 4 setae. Basial endite bilobed with 6 + 7 setae. Exopod (scaphognathite) with 10 plumose marginal setae.
First maxilliped (Fig. 7 A). Basis with 15 setae on inner margin. Endopod 4-segmented, with 3, 1, 3, 4 setae.
Second maxilliped (Fig. 7 B). Endopod 5-segmented, with 2, 1, 0, 2, 6(1 + 5) setae.
Third maxilliped (Fig. 7 C). Unchanged.
First pereiopod (Fig. 7 D). Birramous. Endopod unsegmented and non-chelated with 3 distal setae. Exopod with 2 subterminal and 4 terminal setae.
Second and third pereiopods. Present as a bud.
Pleon (Figs. 6 A, B). 6-segmented. Sixth pleonite with a posterolateral spine.
Telson (Fig. 6 A,B, 7E). Separate from pleonite 6.
Uropods (Fig. 7 F). Birramous, exopod with 7 plumose setae. Endopod shorter than exopod with 2 distal simple setae.
description: Published as part of Guerao, Guillermo, Hernández, Esteban & Urzúa, Ángel, 2011, Early zoeal development of the shrimp Hippolyte leptocerus (Decapoda, Caridea, Hippolytidae), pp. 53-65 in Zootaxa 2988 on pages 54-62, DOI: 10.5281/zenodo.204859