Camposcia retusa (Latreille, 1829)
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publication ID |
https://doi.org/ 10.11646/zootaxa.4577.2.4 |
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publication LSID |
lsid:zoobank.org:pub:23B70FAF-1C14-4688-8413-E6F95E808BE0 |
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DOI |
https://doi.org/10.5281/zenodo.4323911 |
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persistent identifier |
https://treatment.plazi.org/id/03F187C5-FFE9-F25D-FF53-FEBAFBEDD13A |
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treatment provided by |
Felipe |
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scientific name |
Camposcia retusa |
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Zoea I
Size: RDL = 1.94 ± 0.10 mm; CL = 1.18 ± 0.09 mm. (Number of examined specimens: 12).
Carapace ( Fig.1A View FIGURE 1 ). With 1 short curved dorsal spine, 1 straight rostral spine, and 1 lateral spine on each side of the carapace; each lateroventral margin with 1 densely plumose ‘anterior seta’, which is defined as ‘majid seta’ ( Clark et al., 1998), and followed by 5 sparsely plumose setae; eyes sessile.
Antennule ( Fig.1B View FIGURE 1 ). Unsegmented, smooth, conical; 3 aesthetascs present at the terminal end; endopod absent.
Antenna ( Fig. 1C View FIGURE 1 ). Biramous; protopod long and pointed, with 2 rows of tiny spinules; endopod bud presents; exopod unsegmented, with spiny distal processes; 2 plumose setae present about half-way from the tip.
Mandible ( Fig. 1D View FIGURE 1 ). Asymmetric; with median toothed molar and lateral incisor processes, areas between incisor and molars have serrulate processes; palp absent.
Maxillule ( Fig. 1E View FIGURE 1 ). Coxal endite bearing 6 plumodenticulate setae; basial endite with 7 plumodenticulate setae; endopod bi-segmented, with 1 and 6 plumodenticulate setae on proximal and distal segment, respectively.
Maxilla ( Fig. 1F View FIGURE 1 ). Coxal endite bilobed, with 4 and 5 plumodenticulate setae on the proximal and distal lobe, respectively; basial endite bilobed, with 5 and 4 plumodenticulate setae on the proximal and distal lobe, respectively; endopod unsegmented, bearing 8 plumodenticulate setae; exopod (scaphognathite) with 17–18 plumose setae distribute around the margin, plus 1 stout distal process.
Maxilliped I ( Fig. 1G View FIGURE 1 ). Coxa naked; basis bearing 9 plumodenticulate setae arranged at 2 + 2 + 2 + 3; endopod five-segmented and the segments from proximal to distal with 3, 2, 1, 2, 5 plumodenticulate setae, respectively; exopod incompletely bi-segmented, proximal segment naked and distal segment with 4 long plumose terminal natatory setae.
Maxilliped II ( Fig. 1H View FIGURE 1 ). Coxa naked; basis bearing 3 plumodenticulate setae arranged at 1 + 1 + 1; endopod three-segmented and the segments from proximal to distal with 0, 1, 4 plumodenticulate setae, respectively; exopod incompletely bi-segmented, bearing 4 long plumose terminal natatory setae on the distal end.
Maxilliped III ( Fig. 1I View FIGURE 1 ). Undeveloped, present as a small biramous bud.
Pereiopods ( Fig. 1J View FIGURE 1 ). Undeveloped, present as small buds. The first pereiopod bilobed, appears in a shape of chela.
Pleon ( Fig. 1K View FIGURE 1 ). From somites 1 to 5, there are 4, 2, 2, 2, 2 simple setae on dorsal surface of each somite, respectively; somites 2–5 with pleopod buds.
Pleopods. Absent.
Telson ( Fig. 1K View FIGURE 1 ). Bifurcated with a U-shape cleft; 3 pairs of serrulate setae on the middle of posterior margin; 1 pair of lateral acicular spines and 2 pairs of dorsolateral spinules present on the base of furcal shaft; furcal shafts covered with rows of spines from proximal to terminal.
Zoea II
Size: RDL = 2.24 ± 0.06 mm; CL = 1.42 ± 0.05 mm. (Number of examined specimens: 12).
Carapace ( Fig. 2A View FIGURE 2 ). Lateroventral margin with 1 densely plumose ‘anterior seta’ plus 6 sparsely plumose setae; eyes stalked.
Antennule ( Fig. 2B View FIGURE 2 ). Presents 2 terminal buds, coxa and basis are not differentiated, exopod with 8 aesthetascs present on the distal end.
Antenna ( Fig. 2C View FIGURE 2 ). Endopod bud enlarged.
Mandible ( Fig. 2D View FIGURE 2 ). Palp presents, naked, unsegmented.
Maxillule ( Fig. 2E View FIGURE 2 ). Coxal endite bearing 7 plumodenticulate setae; basial endite bearing 9 plumodenticulate setae, with 1 plumose seta present on external margin; endopod bi-segmented, with 1 and 6 plumodenticulate setae on proximal and distal segment, respectively.
Maxilla ( Fig. 2F View FIGURE 2 ). Coxal endite bilobed, with 4 and 3 plumodenticulate setae on the proximal and distal lobe, respectively; basial endite bilobed, with 4 and 5 plumodenticulate setae on the proximal and distal lobe, respectively; endopod unchanged; scaphognathite marginally with 32–34 plumose setae, including one distal stout process.
Maxilliped I ( Fig. 2G View FIGURE 2 ). Coxa, basis and endopod unchanged, except endopod distal segment now with 6 plumodenticulate setae; exopod distal segment with 6 terminal plumose natatory setae.
Maxilliped II ( Fig. 2H View FIGURE 2 ). Exopod distal segment with 6 terminal plumose natatory setae; other parts largely unchanged.
Maxilliped III ( Fig. 2I View FIGURE 2 ). Developing, a triple-lobed bud present.
Pereiopods ( Fig. 2J View FIGURE 2 ). Developing, longer. A distinct but non-functional cheliped present.
Pleon ( Fig. 2K View FIGURE 2 ). 6 somites; from somites 1 to 6, there are 5, 4, 4, 2, 2, 0 simple setae on dorsal surface of each somite, respectively; somites 2–5 with pleopod buds.
Pleopods ( Fig. 2A View FIGURE 2 ). Present as small biramous buds.
Telson ( Fig. 2K View FIGURE 2 ). Unchanged except 1 pair of simple setae present on the U-shape cleft.
Megalopa
Size: CL = 1.45 ± 0.15 mm; CW = 0.95 ± 0.09 mm. (Number of examined specimens: 8).
Carapace ( Fig. 3A View FIGURE 3 ). More crab-like; length longer than width, dorsoventrally compressed; dorsal surface covered sparsely with simple setae; one posterior median process present, and two anterolateral processes present on the dorsal surface; anterolateral margin has 2 simple setae; one process mid-posterior margin; posterior margin with 3 pairs of simple setae.
Antennule ( Fig. 3B View FIGURE 3 ). Peduncle with three segments and the segments from proximal to distal with 0, 0, 2 simple setae, respectively; endopod developed, with 3 simple setae; exopod two-segmented, the proximal segment bearing 3–4 long aesthetascs, and the distal segment with 4 aesthetases plus 1 simple setae.
Antenna ( Fig. 3C View FIGURE 3 ). Segments 1–7, progressing proximally to distally, each with 1, 2, 4 (2+2), 0, 0, 5 (2 short and 3 long, terminally), 4 (1 short and 3 long, terminally) simple setae, respectively; exopod peduncle present on basis.
Mandible ( Fig. 3D View FIGURE 3 ). Asymmetrical; the left has wedge-shape blade with cutting edge; the right blade rounded with cutting edge; both mandibles with incompletely two-segmented palp, distal segment with 6 terminal plumodenticulate setae.
Maxillule ( Fig. 3E View FIGURE 3 ). Coxal endite with 8 apical plumodenticulate setae; basial endite with 16 mostly plumodenticulate setae distally; endopod partly bi-segmented and reduced, lacking setae.
Maxilla ( Fig. 3F View FIGURE 3 ). Coxal endite with 5 + 3 plumodenticulate setae; basial endite with 6 + 6 plumodenticulate setae; endopod naked and reduced; scaphognathite bearing 33–35 marginal plumose setae and 2 plumodenticulate setae on the blade.
Maxilliped I ( Fig. 3G View FIGURE 3 ). Coxa and basis with 7 and 9 plumodenticulate setae, respectively; endopod unsegmented and naked; exopod bi-segmented, proximal segment with 0–1 plumodenticulate seta, and distal segment with 4 long plumose setae; epipod triangular and naked.
Maxilliped II ( Fig. 3H View FIGURE 3 ). Coxa and basis without seta and are not clearly differentiated; endopod with an indistinct basis and subsequent four segments, from proximal to distal, each segment bearing 0, 1, 2, and 5 plumodenticulate setae, respectively; exopod with a naked proximal segment, and distal segment with 4 long plumose setae; epipod absent.
Maxilliped III ( Fig. 3I View FIGURE 3 ). Coxa and basis are not clearly differentiated, with 10 plumodenticulate setae; endopod with 5 segments and the segments from proximal to distal with 15, 7, 5, 6, and 5 plumodenticulate setae, respectively; ischium margin shows crista dentate, and distal margin with one acicular process; exopod with two segments, proximal segment naked, distal segment bearing 4 long plumose setae; epipod prolonged into branchial chamber, with 5 long grooming setae.
Thoracic sternum ( Fig. 4F View FIGURE 4 ). Somites 1–3 fused and form a single plate, with a spade-shape anterior margin and 2 pairs of simple setae on the plate; segment 4 with 3 pairs of simple setae on the anterior margin; subsequent segments naked; posterior margin convex forward.
Pereiopods ( Fig. 4 View FIGURE 4 A–E). All pereiopods covered with dense simple setae. Cheliped (pereiopod 1) welldeveloped, dactylus bearing three acicular processes; pereiopod 2 with one acicular process on anterior margin of propodus; pereiopod 3 with one small rounded process on anterior margin of carpus; pereiopod 4 has one lateral acicular process on merus; pereiopod 5 has one small process on anterior margin of carpus and one acicular process on anterior margin of merus.
Pleon ( Fig. 4K View FIGURE 4 ). With six somites plus telson, dorsal surface of somites 1–6 with 4, 6, 6, 6, 6, and 2 simple setae, respectively; somites 2–5 with functional natatory setose pleopods, and the last somite bearing one pair of uropods.
Pleopods ( Fig. 4 View FIGURE 4 G–K). Five pairs, present on somites 2–5 of the pleon; endopod of pleopod 1–4 bearing 3–4 cincinnuli each; exopod of pleopod 1–4 with 13–15, 13, 12–13, and 10–11 long plumose natatory setae, respectively; pleopod 5 (i.e. uropod) reduced, segments fused, with 6 plumose natatory setae in terminal end.
Telson ( Fig. 4K View FIGURE 4 ). Rectangular, round posteriorly, 1 pair of simple setae dorsally, forming tail fan with uropods.
Crab I
Size: CL = 2.05 ± 0.20 mm; CW = 1.32 ± 0.12 mm. (Number of examined specimens: 5).
Carapace ( Fig. 5A View FIGURE 5 ). Length longer than width, narrowing anteriorly; two triangular processes posterior to eyes; one rounded tubercle on the middle of dorsal surface; two knob-like protuberances near the border of gastric area; the border of cardiac region and posterolateral margin slightly elevated; surface covered with numerous long simple setae and hooked setae.
Antennule ( Fig. 5B View FIGURE 5 ). Peduncle three-segmented with 5, 2, 2 plumose setae, respectively; endopod bisegmented, proximal segment naked and distal segment with 3 + 1 setae; exopod bi-segmented, proximal segment bearing 4 aesthetascs and distal segment with 3 aesthetascs plus 1 simple seta.
Antenna ( Fig. 5C View FIGURE 5 ). Segments 1–8 from proximal to distal has 4, 8, 5, 0, 0, 1, 4, and 3 setae, respectively, all setae are plumose except that 2, 1, 1, and 3 setae on the second, sixth, seventh and last segments are simple.
Mandible ( Fig. 5D View FIGURE 5 ). Asymmetric; blades are the same as for megalopa except that size has increased; palp bisegmented with 0 and 6 plumodenticulate setae.
Maxillule ( Fig. 5E View FIGURE 5 ). Basial endite with 14 plumodenticulate setae; endopod unsegmented and naked.
Maxilla ( Fig. 5F View FIGURE 5 ). Both proximal and distal lobe of basial endite have 5 plumodenticulate setae; Endopod naked and reduced; scaphognathite bearing 41 plumose marginal setae, and 5 plumose setae on the blade.
Maxilliped I ( Fig. 5G View FIGURE 5 ). Coxa bearing 14 plumodenticulate setae; basis with 18 plumodenticulate setae; endopod reduced, with 2–3 short plumodenticulate setae; exopod bi-segmented, proximal segment naked; distal segment with 5 setae, 1 short, plumodenticulate and 4 long, plumose; epipod triangular and prolonged, with 14 long grooming setae.
Maxilliped II ( Fig. 5H View FIGURE 5 ). Coxa and basis naked and not differentiated; endopod five-segmented, from proximal to distal, each segment with 0, 1, 1, 5, 6 plumodenticulate setae, respectively, one process presents on the margin of the first segment; exopod with two segments, the proximal segment without setae, and the distal segment bearing 4 long terminal plumose setae; epipod absent.
Maxilliped III ( Fig. 6A View FIGURE 6 ). Coxa and basis not differentiated, bearing 12 plumodenticulate setae; endopod fivesegmented and from proximal to distal, each segment with 23, 12, 10, 8, 7 plumodenticulate setae, respectively, with crista dentate on the margin of ischium; exopod bi-segmented, the proximal segment with 2 plumodenticulate setae and the distal segment with 4 plumose setae; epipod bearing 3 long simple setae.
Pereiopods ( Fig. 5 View FIGURE 5 C–G). Covered with curved simple setae and hooked setae, both density and length of setae increased compared to megalopa; no process present on segments.
Thoracic sternum ( Fig. 5B View FIGURE 5 ). Somites 1–3 fused and forming a plate, with 10 pairs of simple setae; subsequent segments from proximal to distal bearing 1, 1, 1, and 0 pairs of simple setae, respectively.
Pleon ( Fig. 5I View FIGURE 5 ). With five somites; from proximal to distal each somite with 6, 8, 8, 2, and 16 simple setae, respectively.
Pleopods ( Fig. 5H View FIGURE 5 ). Five pairs; reduced and no seta presents.
Telson ( Fig. 5I View FIGURE 5 ). Triangular, with a rounded posterior margin, bearing 4 simple setae.
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