. Bulletin of the Natural History Museum Zoology. 94 D. JAUME AND BOXSHALL. mm Fig. 9. Euryte longicauda Philippi, 1843, adult male. A, antenna; B, mandible; C. maxillule praecoxal arthrite; D. maxillulary palp; E. maxilla; F, maxilliped. Prosome about times longer than urosome, comprising cephalosome plus 4 free pedigerous somites; first pedigerous somite completely concealed beneath posterior extension of cephalosome, with lateral margins weakly sclerotized; second to fourth somites with evenly rounded posterolateral corners. Ros- trum (Fig. 8C) fused at base, well developed, s
. Bulletin of the Natural History Museum Zoology. 94 D. JAUME AND BOXSHALL. mm Fig. 9. Euryte longicauda Philippi, 1843, adult male. A, antenna; B, mandible; C. maxillule praecoxal arthrite; D. maxillulary palp; E. maxilla; F, maxilliped. Prosome about times longer than urosome, comprising cephalosome plus 4 free pedigerous somites; first pedigerous somite completely concealed beneath posterior extension of cephalosome, with lateral margins weakly sclerotized; second to fourth somites with evenly rounded posterolateral corners. Ros- trum (Fig. 8C) fused at base, well developed, subtriangular in frontal view. Urosome 6-segmented; first abdominal somite with pointed posterolateral angles; entire hyaline frill adorning posterodorsal margin. Genital somite (Figs 8D,E) symmetrical, laterally expanded, with entire hyaline frill around posterodorsal margin; pair of gonopores opening ventrally at posterior border of somite; opercular flaps each armed with 1 inner flanged spine plus 2 outer setae. Third to fifth urosome somites subequal, narrower than genital somite, with entire hyaline frill adorning posterior margin. Anal somite (Fig. 8F) about same size as preceding somites; smooth anal operculum present at one third of distance along somite; serrate hyaline frill around posterolateral margins of somite. Caudal rami (Fig. 8F) of variable length, from to times longer than wide, slightly divergent; distal part slightly wider; armature consisting of 6 setae; seta II located subdistally. Antennules (Fig. 8G) 16-segmented, symmetrical, digeniculate with geniculations between segments homologous with ancestral segments XV and XVI (10 and 11), and segments XX and XXI (14 and 15). Segment 10 cup-shaped, forming sheath around proximal half of segment 11. Segmental fusion pattern and armature as follows: Segment 1 (corresponding to fused ancestral segments I to V), 8 setae + 3 aesthetascs; segment 2 (corresponding to fused ancestral segments VI and VII), 4 set
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Keywords: ., bhlconsortium, bookc, bookcentury1900, bookcollectionbiodiversity
