Leptodius sanguineus (H. Milne Edwards, 1834 )

Al-Haj, Ahmed E., Kumar, A. A. J., El-Sherbiny, Mohsen M., Al-Sofyani, Abdulmohsin, Crosby, Michael P. & Al-Aidaroos, Ali M., 2019, Descriptions of the first zoeas of ten xanthid crabs (Crustacea: Decapoda Xanthoidea) from the Gulf of Aqaba, Red Sea, Zootaxa 4686 (3), pp. 301-345 : 332-336

Leptodius sanguineus (H. Milne Edwards, 1834)

( Figs. 28–30 )

Zoea I. Size (mean ± sd): CW = 0.68 ± 0.01 mm; CL = 0.56 ± 0.03 mm; TT = 1.4 ± 0.03.

Cephalothorax ( Figs. 28a ). Dorsal spine long, spinulated, straight, curved distally; rostral spine straight, equal in length of protopod of antenna, shorter than dorsal spine; lateral spines straight; one pair of posterodorsal setae; eyes sessile.

Antennule ( Fig. 28b ). Uniramous, endopod absent; exopod unsegmented with 4 broad aesthetascs, one terminal seta.

Antenna ( Fig 28c ). Protopodal process distally multispinulate, equal in length of rostral spine; endopod bud present; exopod small, robust, 13% length of protopod with one terminal seta.

Maxillule ( Fig. 29a ). Coxal endite with 7 plumodenticulate setae; basial endite with 5 (3 cuspidate, 2 plumodenticulate) setae; endopod 2-segmented, proximal segment with one simple seta, distal segment with 2+4 setae; exopod setae absent.

Maxilla ( Fig. 29b ). Coxal endite bilobed with 4+4 plumodenticulate setae; basial endite with 5+4 setae; endopod unsegmented, bilobed with 3+5 plumodenticulate setae; exopod (scaphognathite) margin with 4 plumose setae; one stout distal process.

First maxilliped ( Fig. 29c ). Basial endite with 10 medial simple setae arranged 2+2+3+3; endopod 5-segmented with 3,2,1,2,5 setae respectively; exopod 2-segmented, distal segment with 4 terminal plumose natatory setae.

Second maxilliped ( Fig. 29d ). Basial endite with 4 medial simple setae arranged 1+1+1+1; endopod 3-segmented with 1,1,2+3setae. Exopod 2-segmented, distal segment with 4 terminal plumose natatory setae.

Pleon ( Fig. 30a ). Five somites; somite 2 with one pair of dorsolateral processes directed anteriorly; somite 3 with one pair of dorsolateral processes directed posteriorly; somites 1 and 2 with rounded posterolateral process; somites 3–5 with short posterolateral spinous processes; somite 1 without setae; somites 2–5 each with one pair of posterodorsal setae.

Telson ( Fig. 30b ). Each fork gradually curved distally with 2 lateral and 1 medial spines; inner margin with 3 pairs of stout spinulate setae.

Figures

FIGURE 28. Leptodius sanguineus H. Milne Edwards, 1834, zoea I; a) anterior view of cephalothorax; b) antennule; c) antenna.

FIGURE 29. Leptodius sanguineus H. Milne Edwards, 1834 zoea I; a) maxillule; b) maxilla; c) first maxilliped; d) second maxilliped.

FIGURE 30. Leptodius sanguineus H. Milne Edwards, 1834, zoea I; a) dorsal view of pleon; b) dorsal view of fork of telson.