Maja squinado Herbst, 1788
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publication ID |
https://doi.org/ 10.1080/00222930802254755 |
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persistent identifier |
https://treatment.plazi.org/id/5D388782-DF60-FFA0-67F3-1A054FCAFAEC |
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treatment provided by |
Felipe |
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scientific name |
Maja squinado Herbst, 1788 |
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Maja squinado Herbst, 1788 View in CoL
( Figures 1–12 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 View Figure 7 View Figure 8 View Figure 9 View Figure 10 View Figure 11 View Figure 12 )
Zoea I
Size: RDL51.93¡ 0.03 mm; CL51.18¡ 0.02 mm; CW51.42¡ 0.02 mm.
Carapace ( Figure 1A and B View Figure 1 ). With long, naked dorsal spine, curved distally and backwards; long rostral spine, similar length antennae; lateral spines present and well developed; each lateroventral margin with one densely plumose ‘‘anterior seta’’, followed by five additional sparsely plumose setae; one pair of anterodorsal setae and one pair of posterodorsal setae present; eyes sessile.
Antennule ( Figure 3A View Figure 3 ). Uniramous, smooth and conical; endopod absent; exopod unsegmented with four terminal aesthetascs and one minute seta.
Antenna ( Figure 3D View Figure 3 ). Biramous, protopod (spinous process) very long with two rows of spinules; endopod bud approximately 1/3 the size of spinous process; unsegmented exopod shorter than the spinous process, with two unequal subterminal spinulose setae.
Mandible. Incisor and molar processes differentiated; mandibular palp absent.
Maxillule ( Figure 4B View Figure 4 ). Coxal endite with seven setae; basial endite with seven setae (three cuspidate+four plumodenticulate); endopod two-segmented, proximal segment with one seta, distal segment with two subterminal and four terminal setae; exopodal seta absent.
Maxilla ( Figure 5A View Figure 5 ). Coxal endite bilobed with 3+4 setae; basial endite bilobed with 5+4; unsegmented endopod not bilobed, with five terminal setae; exopod
previous studies.
, M. previous studies. (scaphognathite) margin with 11–12 plumose setae plus one distal stout plumose process.
First maxilliped ( Figure 6A View Figure 6 ). Coxa with one seta; basis with nine setae arranged 2+2+2+3; endopod five-segmented with 3,2,1,2,5 (one subterminal and four terminal) setae, respectively; exopod incipiently two-segmented, distal segment with four long plumose natatory setae.
Second maxilliped ( Figure 7A View Figure 7 ). Coxa without setae; basis with three setae arranged 1+1+1; endopod three-segmented with 0,1,4 setae, respectively; exopod incipiently two-segmented, distal segment with four long plumose natatory setae.
Third maxilliped. Present and biramous.
Pereiopods ( Figure 9A View Figure 9 ). Present as small buds, chela bilobed.
Pleon ( Figures 11A, B and D View Figure 11 ). With five pleomeres; pleomeres 2 and 3 with one pair of dorsolateral processes; pleomeres 3–5 with a pair of short posterolateral processes; pleomere 1 with two setae, pleomeres 2–5 with one pair of posterodorsal setae; pleopod buds present on pleomeres 2–5.
Telson ( Figures 11A, B and D View Figure 11 ). Telson fork with three lateral spines; inner margin with three pairs of serrulate setae.
Zoea II
Size: RDL52.19¡ 0.04 mm; CL51.41¡ 0.02 mm; CW51.60¡ 0.02 mm.
Carapace ( Figure 1C View Figure 1 ). Antero-median region with four pairs of setae, one pair of setae near the base of the dorsal spine; each lateroventral margin with a densely plumose ‘‘anterior seta’’, followed by seven additional setae (two plumose and five sparsely plumose). Eyes stalked.
Antennule ( Figure 3B View Figure 3 ). Exopod now with seven terminal aesthetascs; endopod bud present.
Antenna ( Figure 3E View Figure 3 ). Endopod longer than previous stage, reaching middle of the length of spinous process.
Mandible. Palp bud present.
Maxillule ( Figure 4C View Figure 4 ). Basial endite with nine setae; one exopod long plumose seta on outer margin.
Maxilla ( Figure 5B View Figure 5 ). Basial endite with 5+5 setae; scaphognathite with 24–26 marginal plumose setae.
First maxilliped ( Figure 6B View Figure 6 ). Exopod distal segment with six long plumose natatory setae.
Second maxilliped ( Figure 7B View Figure 7 ). Coxa with epipod bud present; exopod distal segment with six long plumose natatory setae.
Third maxilliped ( Figure 8A View Figure 8 ). Biramous bud, epipod rudimentary present. Pereiopods ( Figure 9B View Figure 9 ). Chelipeds and pereiopods 2–5 slightly segmented.
Pleon ( Figures 11C and E View Figure 11 ). Pleomere 6 differentiated, first pleomere with three long mid-dorsal setae; pleomeres 2–5 with long pleopod buds, endopod buds present.
Megalopa
Size. CL: 1.88¡ 0.03 mm; CW: 0.64¡ 0.02 mm.
Carapace ( Figure 2A and B View Figure 2 ). Longer than broad; rostrum short, ventrally deflected with median cleft; with lateral prominent carina; with a cardiac and intestinal tubercles.
Antennule ( Figure 3C View Figure 3 ). Peduncle three-segmented, with 1,1,1 setae respectively; twosegmented endopod with 0,3 (one subterminal+two terminal) setae; exopod foursegmented, with 0,8,4,0 aesthetascs and 0,1,0,1 setae respectively.
Antenna ( Figure 3F View Figure 3 ). Peduncle three-segmented, with 1,1,2–3 setae respectively; flagellum three-segmented, with 0,4,3 setae respectively.
Mandible ( Figure 4A View Figure 4 ). Molar portion not differentiated, incisor process saucer-shaped with acute inner margin; palp two-segmented, with four terminal setae on distal segment.
Maxillule ( Figure 4D View Figure 4 ). Coxal endite with 11 setae; basial endite with 18–19 setae; endopod unsegmented, with two small distal setae.
Maxilla ( Figure 5C View Figure 5 ). Coxal endite bilobed, with 4–5+5 setae; basial endite bilobed with 6+7 setae; endopod unsegmented, without setae; scaphognathite with 42–45 plumose marginal setae and five lateral setae.
First maxilliped ( Figure 6C View Figure 6 ). Epipod with 4–5 long setae; coxal endite with seven setae; basial endite with 12 setae; endopod unsegmented, without setae; exopod twosegmented, proximal segment with one distal plumose setae, distal segment with 4–5 long terminal plumose setae.
Second maxilliped ( Figure 7C View Figure 7 ). Coxa and basis not differentiated, without setae; endopod four-segmented with 0,1,3,5 setae respectively; exopod two-segmented, proximal segment without setae, distal segment with four terminal plumose setae.
Third maxilliped ( Figure 8B View Figure 8 ). Epipod elongated with 12–13 setae (three short sparsely plumose+9–10 very long setae); coxa with 7–9 setae; basis with two setae; endopod five-segmented, with 10–11,8,5,6,5 setae respectively, margin of ischium spinosed or crenulate; exopod two-segmented, proximal segment without seta and distal segment with four long terminal plumose natatory setae.
Pereiopods ( Figure 10A–C View Figure 10 ). All articles well differentiated; pereiopods 2–4 with coxal process; pereiopods 1–3 with ischial process; dactylus of pereiopods 2–5 with 2,2,3,3 stout short spines ( Figure 10B and C View Figure 10 ).
Sternum ( Figure 10A View Figure 10 ). Maxillipeds and cheliped sternites fused with six (arranged 2+2+2) setae; all sternal sutures are medially interrupted.
Pleon ( Figure 12A and B View Figure 12 ). Six pleomeres present; pleomeres 1–6 with 6,8,6,8,8,2 setae; pleomeres 2–5 with posterolateral processes rounded; pleomeres 2–5 each with pair of well developed biramous pleopods.
Pleopods ( Figure 12C–F View Figure 12 ). Endopod unsegmented, with three terminal cincinuli, exopod unsegmented with 12–13,12–13,12,11 long marginal plumose natatory setae respectively.
Uropods ( Figure 12G View Figure 12 ). Two-segmented, proximal segment without setae, and distal segment with five long plumose setae.
Telson ( Figure 12 A and B View Figure 12 ). Square-shaped; dorsal surface with two setae.
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.
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