Nematopalaemon schmitti Ferreira et al. 2010
Creators: name: João Alberto Farinelli Pantaleão
name: Mariana Terossi
name: Fernando Luis Mantelatto
name: Rogério Caetano Costa
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Palaemonidae
Nematopalaemon
Nematopalaemon schmitti

description: Nematopalaemon schmitti (Holthuis, 1950)
Zoea I (Figure 3 (a – m))
Duration: 48 – 72 h.
Dimensions: CL: 0.37 ± 0.02 mm; TL: 1.86 ± 0.06 mm (n = 10).
Carapace (Figure 3 (a – c)): carapace smooth; rostrum without setae and short, not reaching the extremity of the eyes; pterygostomian spine present; eyes compound and sessile.
Antennule (Figure 3 (a,b,d)): peduncle unsegmented; endopod as a long plumose seta; exopod with four terminal aesthetascs and one terminal plumose seta.
Antenna (Figure 3 (a,b,e)): peduncle unsegmented, with a terminal spine near endopod; endopod with one long plumose seta and one terminal inner spine; exopod (antennal scale) 4-segmented, with nine plumose setae on the inner side (4, 1, 1, 3) plus three short simple setae on the outer side (1, 0, 0, 2).
Mandibles: incisor and molar process developed. Palp absent.
Maxillule (Figure 3 (f)): coxal endite with five simple setae; basial endite with six (one stronger and five smaller) cuspidate setae; endopod with one small terminal protuberance and one subterminal simple seta; exopodal seta absent.
Maxilla (Figure 3 (g)): coxal endite bilobed with one and two terminal sparsely plumose setae on proximal and distal lobe, respectively; basial endite bilobed, with two (one simple and one sparsely plumose) setae on each lobe; endopod with one long terminal sparsely plumose seta, microtrichia on inner and outer margin as illustrated; exopod (scaphognathite) margin with five plumose setae.
First maxilliped (Figure 3 (h)): coxa without setae; basis with four simple setae arranged 1 + 1 + 1 + 1; endopod unsegmented, with five (one marginal and two subterminal simple, and two terminal sparsely plumose) setae; exopod unsegmented with three long terminal plumose natatory setae.
Second maxilliped (Figure 3 (i)): coxa without setae; basis with three simple setae arranged 1 + 1 + 1; endopod 4-segmented with one marginal simple, zero, one terminal simple, four terminal (two stout sparsely plumose and two simple) setae, respectively; exopod unsegmented with one small marginal simple and four long terminal plumose natatory setae.
Third maxilliped (Figure 3 (j)): coxa without setae; basis with one simple seta; endopod 4-segmented with two (one marginal and one subterminal) simple, zero, two terminal (one simple and one sparsely plumose), two terminal simple (one stout and one small) setae, respectively; exopod unsegmented with one small subterminal simple and four long terminal plumose natatory setae.
Pereiopods (Figure 3 (k,l)): first and second as biramous buds.
Pleon (Figure 3 (a,b)): with five pleonites without setae and rounded, pleonite six fused with the telson. Pleopods and uropods absent. Anal spine absent.
Telson (Figure 3 (a,m)): broad at posterior margin, with 7 + 7 plumose setae (the outer two setae 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 4 + 4 inner setae.
Zoea II (Figure 4 (a – n))
Duration: more than 48 h.
Dimensions: CL: 0.43 ± 0.02 mm; TL: 1.98 ± 0.12 mm (n = 10).
Carapace (Figure 4 (a – c)): rostrum almost reaching the extremity of the eyes stalks and with one small tooth dorsally; pterygostomian spine present; eyes compound and stalked.
Antennule (Figure 4 (a,b,d)): peduncle 2-segmented; proximal segment without setae and distal segment with two terminal plumose setae; endopod and exopod unchanged.
Antenna (Figure 4 (a,b,e)): unchanged.
Mandibles: unchanged.
Maxillule (Figure 4 (f)): coxal endite with six (four simple, one sparsely plumose and one plumose) setae; basial endite with eight (one stronger and seven smaller) cuspidate setae; otherwise unchanged.
Maxilla (Figure 4 (g)): basial endite bilobed, with three (one small simple, one long simple and one sparsely plumose) setae and four (one small simple, one long simple and two sparsely plumose) setae on proximal and distal lobe, respectively; exopod (scaphognathite) margin with seven plumose setae; otherwise unchanged.
First maxilliped (Figure 4 (h)): coxa with one simple seta; basis unchanged; endopod 2-segmented, with one terminal simple, four (one marginal simple, one terminal simple and two terminal sparsely plumodenticulate) setae; exopod unsegmented with two (one marginal and one terminal) simple and four long terminal plumose natatory setae.
Second maxilliped (Figure 4 (i)): endopod 4-segmented with one marginal simple, zero, two terminal simple, four terminal (two stout sparsely plumose and two simple) setae, respectively; exopod unsegmented with two small marginal (one plumose and one simple) and four long terminal plumose natatory setae; otherwise unchanged.
Third maxilliped (Figure 4 (j)): endopod 4-segmented with two (one marginal and one subterminal) simple, zero, two terminal sparsely plumodenticulate, three terminal (one stout and two slender) simple setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae; otherwise unchanged.
First pereiopod (Figure 4 (k)): coxa without setae; basis with one simple seta; endopod 4-segmented with one marginal, two terminal, one terminal, two terminal (one small and one very long) simple setae, respectively; exopod unsegmented with two small marginal plumose and four long terminal plumose natatory setae.
Second to fifth pereiopods (Figure 4 (l,m)): third and fourth lacking; second and fifth as biramous buds.
Pleon (Figure 4 (a,b)): unchanged.
Telson (Figure 4 (a,n)): with 8 + 8 setae (the outermost pair subterminal and plumose only in the inner margin), inner pair shorter and without setules; one row of minute spinules on distal margin between and around bases of the 5 + 5 inner setae.
description: Published as part of João Alberto Farinelli Pantaleão, Mariana Terossi, Fernando Luis Mantelatto & Rogério Caetano Costa, 2019, Comparative analysis of the early larval stages of two marine shrimp genera Leander and Nematopalaemon (CARIDEA, PALAEMONIDAE) obtained in the laboratory, pp. 881-896 in Journal of Natural History 53 (15) on pages 888-892, DOI: 10.1080/00222933.2019.1611968, http://zenodo.org/record/3673134