First stage zoeal descriptions of five Galatheoidea species from Western Pacific (Crustacea: Decapoda: Anomura)
Author
Guerao, Guillermo
Author
Macpherson, Enrique
Author
Samadi, Sarah
Author
Forges, Bertrand Richer De
Author
Boisselier, Marie-Catherine
text
Zootaxa
2006
1227
1
29
journal article
10.5281/zenodo.172676
6d24480e-7f09-4626-9f47-8ff966d257d0
11755326
172676
Agononida squamosa
(
Henderson, 1885
)
(
Figs 5–6
)
Size
: CL= 0.75 mm; EL= 0.60 mm.
Carapace
(
Figs. 5
A,B). Typical galatheid larval form; without setae; rostrum elongated, surface with spinules; acute spines posteriorly, posterodorsal margin with 15 or 16 teeth and posteroventral margin with 17 or 18 teeth; eyes sessile and long, the EL more than 1/2 of CL.
Antennule
(
Fig. 5
C). Uniramous, endopod absent, with 6 setae terminally (not completely extruded) and 1 long subterminal plumose setae.
FIGURE 3.
Neonida grandis
Baba
and de Saint Laurent, 1996, first zoea. A, 1st maxilliped; B, 2nd maxilliped; C, 3rd maxilliped. Scale bar = 0.1 mm.
Antenna
(
Fig. 5
D). Biramous; protopod with 1 spinose process with 2 rows of spinules, probably shorter than endopod; endopod unsegmented, without setae and with sparse spines; exopod (scaphocerite) ending in process not completely extruded in any examined individuals, inner margin with 8 plumose setae and 1 simple seta.
Mandible
. Similar to
Neonida grandis
, left and right mandibles developed molar processes strongly spinose; palp absent.
Maxillule
(
Fig. 5
E). Setae not completely extruded, but clearly observable. Coxal endite with 7 sparsely plumose setae; basial endite with 5 setae (2 strong prominent cuspidate setae); endopod 2segmented with 5 setae on distal segment (1 subterminal simple seta + 4 terminal setae).
Maxilla
(
Fig. 6
A). Setae not completely extruded, but clearly observable. Coxal endite bilobed with 8+4 setae; basial endite bilobed with 5+4 setae; endopod unsegmented, bilobed, with 3 +4 setae and mat of microtrichia in outer margin; exopod (scaphognathite) lobe developed anteriorly only and with 4 marginal plumose seta and 1 long posterior plumose process.
FIGURE 4.
Neonida grandis
Baba
and de Saint Laurent, 1996, first zoea. A, abdomen, dorsal view; B, abdomen, lateral view; C, telson. Scale bar = 0.5 mm.
First maxilliped
(
Fig. 6
B). Setae not completely extruded, but clearly observable. Coxa with 2 setae; basis with 11 (2,3,3,3) sparsely plumose setae on ventral margin; endopod 5segmented with 3,2,1,2,5 (1 subterminal + 4 terminal) setae; exopod 2 segmented with 4 terminal setae.
Second maxilliped
(
Fig. 6
C). Setae not completely extruded, but clearly observable. Coxa without setae; basis with 3 sparsely plumose setae (1, 2) on anteroventral margin; endopod 4segmented with 2,2,2,5 (1 subterminal + 4 terminal) setae; exopod 2 segmented with 4 terminal setae.
Third maxilliped
. Small unsegmented bud.
Pereiopods
. Absent.
FIGURE 5.
Agononida squamosa
(Henderson, 1885)
, first zoea. A, lateral view; B, dorsal view; C, antennule; D, antenna; E, maxillule. Scale bar of A and B = 0.5 mm; Scale bar of CE = 0.1mm.
Abdomen
. Five somites plus telson; somites 4 and 5 with posterolateral processes; somites 2–5 each with pair of posterodorsal setae and without denticles or teeth on posterior margin; pleopods absent.
Telson
. Forked with median cleft; with 7+7 processes not completely extruded, first (lateralmost) immovable spine, second short plumose seta (anomuran hair), third to seventh bearing long, stout plumose setae and minute spinules.