First stage larva of the mud shrimp Nihonotrypaea makarovi Marin, 2013 (Decapoda: Axiidea: Callianassidae) obtained in the laboratory Author Korn, Olga M. Author Kornienko, Elena S. Author Golubinskaya, Darya D. text Zootaxa 2016 2016-02-19 4083 3 journal volume 31393 10.11646/zootaxa.4083.2.5 abb8fa8e-18e1-4aca-b3a5-635e8551c960 1175-5326 1053839 270F8342-560D-449F-AE81-AED155F77CBE Nihonotrypaea makarovi Marin, 2013 First zoea ( Fig. 1 ) Material examined . TL = 3.66 ± 0.04 mm; CL = 1.51 ± 0.02 mm; N = 10. Carapace ( Fig. 1A, B ). Longer than wide; frontal margin with pair of short antennal spines, anteroventral margins serrated; rostral spine straight, long, pointed, shorter than carapace, covered with spinules in distal part; eyes sessile; cervical groove not visible, linea thalassinica absent. Antennule ( Fig. 1C ). Elongated, uniramous, unsegmented, with 3 terminal aesthetascs of different length, 3 terminal simple setae of different length and a long densely plumose subterminal seta on inner margin. Antenna ( Fig. 1D ). Peduncle with a distal serrated spine near the base of scaphocerite; endopod unsegmented, shorter than half of exopod, with 2 long terminal plumose setae; scaphocerite with a distal spine, 7–8 inner plumose setae and 1 outer short sparsely plumose seta. Mandible ( Fig. 1E ).Without palp. Maxillule ( Fig. 1F ). Coxal endite with 6–7 plumodenticulate setae; basial endite with 2 marginal plumodenticulate cuspidate setae and 3 submarginal plumodenticulate setae; endopod incompletely 2-segmented, with 3, 2+4 plumodenticulate setae. Maxilla ( Fig. 1G ). Coxal and basial endites distinctly bilobed; coxal endite with 11–13+3–4 plumodenticulate setae; basial endite with 7+5–6 plumodenticulate setae; endopod unsegmented, with 3–4+2+2+5 plumodenticulate setae; scaphognathite with 5 marginal densely plumose setae (narrow proximal lobe bearing with very long seta). First maxilliped ( Fig. 1H ). Coxa nearly equal basis, with 7 plumodenticulate setae; basis with 10–11 plumodenticulate setae; endopod slightly shorter than exopod, 4-segmented, with 10 plumodenticulate and 1 outer plumose setae arranged 3, 2, 2, 3+1; exopod unsegmented, with 4 terminal plumose natatory setae. Second maxilliped ( Fig. 1I ). Coxa shorter than basis, with 1 plumodenticulate seta; basis with 5 plumodenticulate setae; endopod shorter than exopod, 4-segmented, with 10 plumodenticulate and 1 outer plumose setae arranged 2, 2, 2, 4+1; exopod as in the first maxilliped. Third maxilliped ( Fig. 1J ). Coxa shorter than basis, without setae; basis with 1–2 plumodenticulate setae of different length; endopod half the length of exopod, not clearly segmented, with 4–5 plumodenticulate and 1 outer plumose setae arranged 1–2, 3+1; exopod unsegmented, with 5 terminal plumose natatory setae. Pereiopods. Absent. Pleon ( Fig. 1A, B ). Five pleonites, pleonite 2 with a long posterodorsal spine, pleonites 3–5 with comb-like denticulated ridges. Pleopods. Absent. Telson ( Fig. 1K ). Triangular, longer than wide, with central spine fused with telson; posterior margin with 7+1+7 processes: outermost spine-like serrated seta, plumose thalassinidean hair near base of the process 3 and 5 long plumodenticulate setae; anal spine absent. Uropod. Absent. Colour . A pair of large orange chromatophores on the ventral margins of carapace.