Pilumnus vespertilio
Creators: name: Clark, Paul F.
name: Paula, José
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Pilumnidae
Pilumnus
Pilumnus vespertilio

description: Pilumnus vespertilio (Fabricius, 1793)   
(Figs. 37-40)  
  Larval description. – Pilumnus vespertilio ; Aikawa, 1929: 41, pl. III, Fig. 14, zoea I; Hashmi, 1970a: zoea I-III; Lim & Tan, 1981: 71-88, Figs. 1-5, zoea I-III & megalop and Terada, 1990: 29-31, Figs. 6-7, zoea I-III.   
Carapace (Fig. 37a): dorsal spine smooth, curved distally, short, approximately three times as long as rostral spine; rostral spine smooth, short and distinctively shorter than antennal protopod; lateral spines short and unarmed; 1 pair of posterodorsal setae; ventral margin without setae, eyes sessile.  
Antennule (Fig. 37b): uniramous, endopod absent; exopod unsegmented with 2 broad and long, 2 shorter and slender aesthetascs plus 2 terminal setae of unequal length.  
Antenna (Fig. 37c): protopod distally bilaterally spinulate, much longer in length than rostral spine; endopod bud present; exopod unsegmented, distally spinulate with 1 long and 1 smaller medial setae unequal in length.  
Mandible: endopod palp absent.  
Maxillule (Fig. 38a): epipod seta absent; coxal endite with 7 setae; basial endite with 5 terminal setal processes and 2 small teeth; endopod 2-segmented, proximal segment with 1 seta; distal segment with 6 (2 subterminal, 4 terminal) setae; exopod seta absent.  
Maxilla (Fig. 38b): coxal endite bilobed with 6+4 setae; basial endite bilobed with 5+4 setae; endopod bilobed with 3+5 (2 subterminal, 3 terminal) setae; exopod (scaphognathite) margin with 4 setae and 1 long distal stout process.  
First maxilliped (Fig. 39a): coxa without setae; basis with 10 setae arranged 2,2,3,3; endopod 5-segmented with 3,2,1,2,5 (1 subterminal, 4 terminal) setae respectively; exopod 2-segmented, distal segment with 4 long terminal plumose natatory setae.  
Second Maxilliped (Fig. 39b): coxa without setae; basis with 4 setae arranged 1,1,1,1; endopod 3-segmented, with 1,1,6 (3 subterminal, 3 terminal) setae respectively; exopod 2- segmented, distal segment with 4 long terminal plumose natatory setae.  
Third maxilliped (Fig. 40c): present and biramous.  
Pereiopods (Fig. 40d): present and chela bilobed.  
Abdomen (Figs. 40a, b): 5 somites; somite 2 with a pair of dorsolateral processes directed anteriorly; somite 3 with a pair of dorsolateral processes directed ventrally; somites 1- 2 with rounded posterolateral processes and 3-5 with short posterolateral spinous processes; somite 1 without dorsal setae; somites 2-5 with 1 pair of posterodorsal setae; posterior margin of somites 2-5 spinulate; pleopod buds absent.  
Telson (Figs. 38c, 40a, b): each telson fork long, spinulate and gradually curved distally; 1 long and 1 small lateral spine; dorsal medial spine present; posterior margin with 3 pairs of stout spinulate setae.
description: Published as part of Clark, Paul F. & Paula, José, 2003, Descriptions Of Ten Xanthoidean (Crustacea: Decapoda: Brachyura) First Stage Zoeas From Inhaca Island, Mozambique, pp. 323-378 in Raffles Bulletin of Zoology 51 (2) on pages 361-370, DOI: 10.5281/zenodo.13229521