Heterocarpus abulbus Yang, Chan & Chu, 2010

Jiang, Guo-Chen, Chan, Tin-Yam & Shih, Tung-Wei, 2014, Morphology of the first zoeal stage of three deep-water pandalid shrimps, Heterocarpus abulbus Yang, Chan & Chu, 2010, H. hayashii Crosnier, 1988 and H. sibogae De Man, 1917 (Crustacea: Decapoda: Caridea), Zootaxa 3768 (4), pp. 428-436 : 429

Heterocarpus abulbus Yang, Chan & Chu, 2010

( Fig. 1 , Table 1 )

Size: CL, mean 0.55 mm (range 0.53–0.58 mm); BL, mean 2.44 mm (range 2.38–2.55 mm); TL, mean 2.95 mm (range 2.88–3.05 mm).

Carapace ( Figs. 1 A, B, D): Dorsoventrally flattened; rostrum slightly curved downwards and slender, longer than antennular peduncle; dorsal anterior and posterior processes present; anteroventral margin bearing strong pterygostomian spine, followed by 1 minute and 1 distinct spines; eyes sessile.

Antennule ( Fig. 1 E): Peduncle unsegmented, slender and bearing 1 small tubercle; exopod unsegmented with 1 spatulate seta and 3 terminal aesthetascs as well as 1 terminal plumose seta; endopod with 1 long plumose seta.

Antenna ( Fig. 1 F): Peduncle unsegmented and with 1 spine distally; endopod unsegmented, with 1 long terminal plumose seta and 1 slender spine; exopod distally 6-segmented, with 11 marginal plumose setae, 1 distolateral seta (simple) and inner tubercle.

Mandible ( Fig. 1 G): Palp absent; incisor and molar processes well differentiated; with lacinia mobilis.

Maxillule ( Fig. 1 H): Coxal endite with 7 (2 subterminal+5 terminal) setae; basial endite with 2 strong setae and 3 cuspidate setae; endopod unsegmented, with 2 subterminal setae and 3 terminal setae; exopod absent.

Maxilla ( Fig. 1 I): Coxal endite bilobed with 8+3 setae; basial endite bilobed with 3+4 setae; endopod with 9 (3+2+1+1+2) setae; scaphognathite margin with 5 plumose setae.

First maxilliped ( Fig. 1 J): Coxa with 5 setae; basis with 11 setae; endopod unsegmented with 3, 1, 2, 4 (1 subterminal+3 terminal) setae; exopod unsegmented with 4 long plumose natatory setae.

Second maxilliped ( Fig. 1 K): Coxa with 2 setae; basis with 8 setae; endopod 4-segmented with 3, 1, 2, 5 (1 subterminal+4 terminal) setae; exopod unsegmented with 5 long plumose natatory setae.

Third maxilliped ( Fig. 1 L): Coxa without setae; basis with 4 setae; endopod 4-segmented with 2, 1, 2, 4 (1 subterminal+3 terminal) setae; exopod unsegmented with 5 long plumose natatory setae.

Pereiopods: Absent.

Abdomen ( Fig. 1 A, C): With 5 somites and without setae or spines.

Pleopods: Absent.

Uropods: Absent.

Telson ( Fig. 1 A): Subtriangular, posterior border with 7+7 setae, outermost 2 pairs only plumose on inner margin; bases of each seta except outermost one with row of minute spinules.

Figures

FIGURE 1. First zoea of Heterocarpus abulbus Yang, Chan & Chu, 2010; A) dorsal view; B) carapace lateral view; C) abdomen lateral view; D) anteroventral margin of carapace; E) antennule; F) antenna; G) mandible; H) maxillule; I) maxilla; J) first maxilliped; K) second maxilliped; L) third maxilliped.