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FIG. 6. —Verruca minuta n in Cirripedia Thoracica (Crustacea) collected during the "Campagne de La Calypso (1961-1962)" from the Atlantic shelf of South America

FIG. 6. —Verruca minuta n. sp. Holotype; A, cirrus I; B, cirrus II; C, cirrus III; D, caudal appendage, penis and protopodite of cirrus VI. Abbreviations: a., anterior ramus; c.a., caudal appendage; pe., penis; p., posterior ramus. Scale bars: 0.1 mm.

FIG. 2. — Weltnerium hydrozoaphilum n in Cirripedia Thoracica (Crustacea) collected during the "Campagne de La Calypso (1961-1962)" from the Atlantic shelf of South America

FIG. 2. — Weltnerium hydrozoaphilum n. sp. Holotype; A, lateral view of left side; B, carinal view, detail where the carino-latera are in contact; C, rostral view. Abbreviations: cl, carinal-latus peduncular plate; l, lateral peduncular plate; rl, rostral-latus peduncular plate; sc, subcarinal peduncular plate; sr, subrostral peduncular plate. Scale bars: 1 mm.

FIG. 1 in Cirripedia Thoracica (Crustacea) collected during the "Campagne de La Calypso (1961-1962)" from the Atlantic shelf of South America

FIG. 1. — Ornatoscalpellum gibberum (Aurivillius, 1892); A-G, juvenile stages and the peduncular plates. Abbreviations: cl, carinal- latus peduncular plate; l, lateral peduncular plate; rl, rostral-latus peduncular plate; sc, subcarinal peduncular plate. Scale bar: A-F, 0.5 mm; G, 1 mm.

FIG. 5. — Verruca minuta n in Cirripedia Thoracica (Crustacea) collected during the "Campagne de La Calypso (1961-1962)" from the Atlantic shelf of South America

FIG. 5. — Verruca minuta n. sp. Holotype; A, palp and part of the labrum; B, mandible; C, maxilla I; D, maxillae II (Paratype, La Calypso stn 66); E, intermediate article (10) of cirrus VI. Abbreviation: cVI, cirrus VI. Scale bars: 0.1 mm.

FIG. 6 in A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities

FIG. 6. — Comparison between the primordial plates of the earliest juvenile stages of the principal suborders of thoracic Cirripedia; A, Lepadomorpha, Lepas (from Newman et al. 1979: fig. 87); B, Scalpellomorpha, composite of Neolepas and Pollicipes (respectively from Newman, in prep. and Broch 1922); C, Neoverruca (reconstructed from Newman 1989); D, x-juvenile (Høeg & Newman 1997 & herein); E, F, Verruca and Semibalanus (respectively from Runnström, 1925, 1927). Abbreviations: S, scutum; T, tergum; C, carina).

FIG. 2 in A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities

FIG. 2. — Plates of Imbricaverruca yamaguchii gen. et n. sp. (paratype, MNHN Ci2711); A, B, viewed from above and from the rostral end, respectively; A, note the operculum, comprising the plates of the right side (MS-L-MT), includes a large median latus; B, note the slightly open aperture to the mantle cavity between the occludent margins of the movable (MS & MT) and the fixed (FS & FT) scutum and tergum, respectively; C-M, variously disarticulated hard parts; C, interior view of wall (R-C-FS-FT) and operculum (MS-L-MT) with all of the imbricating plates, except the uppermost of the three principle lateral tiers of the right side (rl1-l1-cl1), stripped away [an approximation of the rostrum (R), which did not survive dissection, is indicated by the dashed line]; D, E, movable scutum (MS); external and internal views respectively; scutal adductor muscle, inserting from just below to up under the apical concavity in Fig. 2E, extends to its origin on the fixed scutum (FS, Fig. 2G; the relationship of MS to FS can be seen in Fig 2C); F, G, fixed scutum (FS); basal and internal views, respectively. Dashed line in G indicates origin of scutal adductor muscle but no scar is evident. The relationship of the two protuberances (best seen near the tergal margin in Fig. 2G) to the fixed tergum (FT, Fig. 2J, K), was not resolved; H, I, movable tergum (MT); external and internal views respectively (external corrosion in bleach and cleaning inadvertently obliterated growth line ornamentation in H); J, K, fixed tergum (FT); external and internal views respectively; L, M, carina from below and above respectively (the rostrum did not survive dissection and cleaning). Abbreviations: C, carina; cl1-4, l1-4, rl1-4, carinolateral, lateral and rostrolateral plates forming three tiers each four plates high, respectively; FS, FT, fixed scutum and tergum; L, median latus; MS, MT, movable scutum and tergum; R, rostrum. Scale bars: 1 mm.

FIG. 1. — A, Imbricaverruca yamaguchii n. gen. and n in A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities

FIG. 1. — A, Imbricaverruca yamaguchii n. gen. and n. sp. (holotype, MNHN Ci2710); B, Verruca s.l., both viewed from above with the right scutum and tergum forming the operculum. Note that in the former the four plated wall appears to be covered largely by imbricating plates and the operculum includes a large median latus, characters that readily distinguish it from Neoverruca. Scale bar: 5 mm.

FIG. 5 in A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities

FIG. 5. — Jensen's x-juvenile from the Lau Basin, Tonga (Høeg & Newman 1997); A, viewed from the left dorso-lateral; B, left lateral; C, ventral sides, respectively (the shard of chitin extending from the aperture in B and C apparently left over from the last molt). It is a first juvenile of a thoracican cirriped and likely that of Imbricaverruca yamaguchii n. gen. and n. sp.; see Fig. 6 and text for explanation. Abbreviations: A1, first antenna; C, carina; "C", incipient cirri; LS, left scutum; LT, left tergum; RS, right scutum; P, peduncle. Scale bars: 100 µm.

FIG. 3 in A new genus and species of barnacle (Cirripedia, Verrucomorpha) associated with vents of the Lau Back-Arc Basin: its gross morphology, inferred first juvenile stage and affinities

FIG. 3. — Cirri (right side) and the trophi (appendages from the right side viewed from without, those of the left sides form within) of Imbricaverruca yamaguchii n. gen. and n. sp. (paratype, MNHN Ci2711); A, cirrus I, anterior ramus missing; B, cirrus II, setae omitted from the posterior ramus of the intact cirrus (left) are shown on the excised ramus (right); C, cirrus VI (setae of distal half omitted) and penis (annulations omitted); D, setation of an intermediate segment of outer ramus of cirrus VI (17th article from distal end); E, end of penis enlarged; F, labrum and mandibular palps; G, H, right and left mandible; I, spinous margin of H enlarged; J, K, right and left first maxillae; L, right second maxilla. Scale bars: A-C, 0.5 mm; D, E, 0.15 mm; F-L, 0.2 mm.

FIG. 29 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 29. — Trianguloscalpellum ovale (Hoek, 1883) (MNHN Ci 368); A, right lateral view; B, carinal view. Scale bar: 5 mm.

FIG. 26. — A in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 26. — A, Scalpellum striatum Gruvel, 1900, lectotype (MNHN Ci 381), right lateral view; B, Arcoscalpellum curvatum (Gruvel, 1900), holotype (MNHN Ci 383), right lateral view; C, Amigdoscalpellum talismani (Gruvel, 1900), holotype (MNHN Ci 391), right lateral view. Scale bars: A, C, 5 mm; B, 3 mm.

FIG. 25 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 25. — Scalpellum patagonicum Gruvel, 1900, holotype (MNHN Ci 403), right lateral view. Scale bar: 5 mm.

FIG. 28 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 28. — Weltnerium weltneri (Gruvel, 1907), lectotype (MNHN Ci 389); A, left lateral view; B, rostral view; C, carinal view. Scale bars: 1 mm.

FIG. 22 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 22. — Ornatoscalpellum vanhoeffeni (Gruvel, 1907), lectotype (MNHN Ci 388); A, prosoma; B, cirrus I; C, median article of cirrus VI; D, protopodite of cirrus VI and penis. Scale bars: A, 1 mm; B-D, 0.2 mm.

FIG. 24 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 24. — Scalpellum edwardsi Gruvel, 1900, holotype (MNHN Ci 390), left lateral view. Scale bar: 5 mm.

FIG. 23 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 23. — Smilium longirostrum (Gruvel, 1900), holotype (MNHN Ci 399), right lateral view. Scale bar: 1 mm.

FIG. 21 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 21. — Ornatoscalpellum vanhoeffeni (Gruvel, 1907), lectotype (MNHN Ci 388); A, labrum and palp; B, C, mandibles; D, maxilla I; E, maxilla II. Scale bars: A, 0.2 mm; B-E, 0.1 mm.

FIG. 13 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 13. — Teloscalpellum luteum (Gruvel, 1900), holotype (MNHN Ci 398); A, left lateral view; B, rostral view; C, carinal view. Scale bars: A, 5 mm; B, C, 3 mm.

FIG. 20 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 20. — Ornatoscalpellum vanhoeffeni (Gruvel, 1907), lectotype (MNHN Ci 388); A, left lateral view; B, rostral view; C, carinal view. Scale bar: 2 mm.

FIG. 1 in Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d'Histoire naturelle, France, studied by Abel Gruvel

FIG. 1. — Euscalpellum renei (Gruvel, 1902); A, lectotype (MNHN Ci 373), left lateral view; B-D, La Calypso (MNHN Ci 374); B, left lateral view; C, rostral view; D, carinal view. Scale bars: 1 mm.