Leander paulensis Ortmann, 1897
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publication ID |
https://doi.org/ 10.1080/00222933.2019.1611968 |
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persistent identifier |
https://treatment.plazi.org/id/924E5918-FFCC-3112-D8F9-E8E0FC40A703 |
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treatment provided by |
Valdenar |
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scientific name |
Leander paulensis Ortmann, 1897 |
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Leander paulensis Ortmann, 1897 View in CoL
Zoea I ( Figure 1 View Figure 1 (a – m))
Duration: 48 – 72 h.
Dimensions: CL = 0.34 ± 0.02 mm; TL = 1.83 ± 0.04 mm (n = 10).
Carapace ( Figure 1 View Figure 1 (a – c)): carapace smooth; rostrum slender and long, slightly overreaching the antennule exopod, ventral margin with four small terminal denticles as illustrated; pterygostomian spine present; eyes sessile.
Antennule ( Figure 1 View Figure 1 (a,b,d)): peduncle-unsegmented; endopod as a long plumose seta; exopod with four terminal aesthetascs and one terminal plumose seta.
Antenna ( Figure 1 View Figure 1 (a,b,e)): peduncle-unsegmented and smooth; endopod with one long plumose seta and one strong outer terminal spine; exopod (antennal scale) 5-segmented, with ten plumose setae, nine on inner side (4, 1, 1, 1, 2), one shorter on the outer side of fourth segment, plus two small simple setae on the outer side of first and fifth segments.
Mandibles: incisor and molar process developed. Palp absent.
Maxillule ( Figure 1 View Figure 1 (f)): coxal endite with five simple setae; basial endite with five (two stout cuspidate and three simple) setae; endopod with two terminal (one simple and one sparsely plumodenticulate) setae; exopodal seta absent.
Maxilla ( Figure 1 View Figure 1 (g)): coxal endite not bilobed, with two sparsely plumose setae and one small protuberance; basial endite bilobed, with one and two simple seta on proximal and distal lobe, respectively; endopod unsegmented, with one terminal simple seta; exopod (scaphognathite) with five marginal plumose setae; michrotrichia on margins of exopod, endopod, basial and coxal endites as illustrated.
First maxilliped ( Figure 1 View Figure 1 (h)): coxa without setae; basis with nine simple setae arranged 1 + 2 + 1 + 4 + 1; endopod 2-segmented with one marginal simple, five (two marginal simple + three terminal sparsely plumodenticulate) setae, respectively; exopod unsegmented with four long terminal plumose natatory setae.
Second maxilliped ( Figure 1 View Figure 1 (i)): coxa without setae; basis with four simple setae arranged 1 + 1 + 2; endopod 3-segmented with one marginal simple, three (one terminal simple and two subterminal sparsely plumodenticulate), four terminal (one stout and three slender) sparsely plumodenticulate setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae.
Third maxilliped ( Figure 1 View Figure 1 (j)): coxa without setae; basis with three simple setae arranged 1 + 1 + 1; endopod 3-segmented with two (one marginal and one subterminal) simple, three terminal (one small simple, one long simple and one long sparsely plumodenticulate), three terminal (two serrate and one small simple) setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae.
Pereiopods ( Figure 1 View Figure 1 (k,l)): first and second as biramous bud.
Pleon ( Figure 1 View Figure 1 (a,b)): with five pleonites, pleonite three with one pair of posterodorsal simple setae, pleonite five with two posterolateral spines, pleonite six fused with the telson. Pleopods and uropods absent. Anal spine absent.
Telson ( Figure 1 View Figure 1 (a,m)): broad at posterior margin, with 7 + 7 plumose setae (the outer two setae are plumose only in the inner margin), outermost pair subterminal, inner pair shorter; one row of minute spinules on distal margin between and around bases of the 6 + 6 inner setae.
Zoea II ( Figure 2 View Figure 2 (a – n))
Duration: more than 48 h.
Dimensions: CL: 0.42 ± 0.01 mm; TL: 1.96 ± 0.09 mm (n = 10).
Carapace ( Figure 2 View Figure 2 (a – c)): rostrum reaching the extremity of the antennule peduncles, tip of ventral margin with six or seven small terminal denticles; presence of one pair of pterygostomian spines, one pair of supraorbital spines and one dorsal spine with three small terminal denticles as illustrated; eyes compound and stalked.
Antennule ( Figure 2 View Figure 2 (a,b,d)): peduncle 2-segmented, proximal segment with four terminal (three simple and one plumose) setae, distal segment with two terminal plumose setae; endopod unchanged; exopod with four terminal aesthetascs.
Antenna ( Figure 2 View Figure 2 (a,b,e)): endopod with one small simple, one long plumose seta and one strong outer terminal spine; exopod (antennal scale) 4-segmented with ten plumose setae, nine on inner side (4, 1, 1, 3) and one shorter on the outer side of fourth segment, plus two small simple setae on the outer side of first and fourth segments.
Mandibles: unchanged.
Maxillule ( Figure 2 View Figure 2 (f)): basial endite with seven (four stout cuspidate and three simple) setae; endopod with two terminal sparsely plumodenticulate setae; otherwise unchanged.
Maxilla ( Figure 2 View Figure 2 (g)): exopod (scaphognathite) with seven marginal plumose setae; michrotrichia on margins of exopod, endopod and basial endite as illustrated; otherwise unchanged.
First maxilliped ( Figure 2 View Figure 2 (h)): basis with eight simple setae arranged 1 + 2 + 1 + 2 + 1 + 1; endopod 3-segmented with one marginal simple, two (one subterminal and one terminal) simple and three (one subterminal and two terminal) sparsely plumodenticulate setae, respectively; otherwise unchanged.
Second maxilliped ( Figure 2 View Figure 2 (i)): endopod 3-segmented with one marginal simple, three terminal (one simple and two sparsely plumodenticulate), three terminal (one stout and two slender) sparsely plumodenticulate setae, respectively; exopod 2-segmented with one terminal small plumose, five (one small marginal simple and four long terminal plumose natatory) setae, respectively; otherwise unchanged.
Third maxilliped ( Figure 2 View Figure 2 (j)): endopod 4-segmented with two (one marginal and one subterminal) simple, zero, three terminal (one small simple, one long serrate and one sparsely plumodenticulate), three terminal (one long and two smaller) sparsely plumodenticulate setae, respectively; exopod 2-segmented with zero, five (one marginal small simple and four long terminal plumose natatory) setae, respectively; otherwise unchanged.
First pereiopod ( Figure 2 View Figure 2 (k)): coxa without setae; basis with one subterminal simple seta; endopod 4-segmented with one marginal simple, one terminal simple, one terminal serrate, three (one subterminal simple and two long terminal serrate) setae, respectively; exopod 2-segmented with two terminal small simple, four long terminal plumose natatory setae, respectively.
Second pereiopod ( Figure 2 View Figure 2 (l)): coxa without setae; basis with one subterminal simple seta; endopod 4-segmented with one marginal simple, zero, two terminal serrate, two (one subterminal small simple and one terminal long serrate) setae, respectively; exopod 2-segmented with zero, four long terminal plumose natatory setae, respectively.
Third to fifth pereiopods ( Figure 2 View Figure 2 (m)): third and fourth lacking; fifth as an uniramous bud.
Pleon ( Figure 2 View Figure 2 (a,b)): unchanged.
Telson ( Figure 2 View Figure 2 (a,n)): with 8 + 8 plumose setae (the outermost pair subterminal and plumose only in the inner margin), inner pair shorter; one row of minute spinules on distal margin between and around bases of the 7 + 7 inner setae.
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