New insights gained from museum collections: Deep-sea barnacles (Crustacea, Cirripedia, Thoracica) in the Museum National d'Histoire Naturelle, Paris, collected during the Karubar expedition in 1991 Author Pitriana, Pipit Museum fuer Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115, Berlin, Germany & Research Centre for Deep-sea, Indonesian Institute of Science (LIPI), Jl Y Syaranamual, Poka, Tlk. Ambon, Kota Ambon, Maluku, Indonesia & Institute of Geological Sciences, Freie Universitaet Berlin, Malteserstrasse 74 - 100 Building C and D, 12249, Berlin, Germany pipit.pitriana@mfn.berlin Author Jones, Diana S. The Western Australian Museum, 49 Kew Street, Welshpool WA 6106, Locked Bag 49, Welshpool DC WA 6986, Australia Author Corbari, Laure Museum national d'Histoire naturelle, Institut de Systematique, Evolution, Biodiversite ISYEB - UMR 7205 - CNRS, MNHN, UPMC, EPHE, 57 rue Cuvier, CP 26, 75005, Paris, France https://orcid.org/0000-0002-3323-6162 Author Rintelen, Kristina von Museum fuer Naturkunde - Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115, Berlin, Germany https://orcid.org/0000-0003-4167-3570 text Zoosystematics and Evolution 2020 96 2 649 698 http://dx.doi.org/10.3897/zse.96.55733 journal article http://dx.doi.org/10.3897/zse.96.55733 1860-0743-2-649 DF25E94FEDEC4FD4BA1DE4AC288282AD 4C0AB21B0CEE5A699C8EE3B3C068C76B Glyptelasma gracile (Hoek, 1883) Figure 7 Poecilasma gracile Hoek, 1883: 46, pl. II, figs 2-4. Megalasma gracile gracilius . - Pilsbry, 1907a: 88, pl. V, fig. 16, pl. VII, figs 6-9. Megalasma gracile . - Nilsson-Cantell 1938 : 10. Megalasma (Glyptelasma) gracile . - Zevina 1982 : 84, fig. 74. Glyptelasma gracile . - Jones et al. 2001 : 239. Material examined. - Tanimbar Island: 14 specimens, MNHN-IU-2019-4873, Stn. CP 54, 08°21'S , 131°43'E , 836-869 m depth, 30 October 1991, attached to spine of sea urchin; 1 specimen, MNHN-IU-2019-4875, Stn. CC 57, 08°19'S , 31°53'E , 603-620 m depth, 31 October 1991; 3 specimens (1 adult, 2 juveniles), MNHN-IU-2019-4876, Stn. CP 73, 08°29'S , 131°33'E , 840-855 m depth, 2 November 1991, attached to spines of sea urchins. Diagnosis. Capitulum with five plates; carina enlarged, keel-shaped; tergum with basal point truncated; maxillule notched; caudal appendages with relatively-long spines at tip. Description. Capitulum whitish, peduncle brownish. Capitulum compressed, striated, about twice as long as broad. Scutum with apex pointed; tergum basally truncated, flat, oblong. Carina flat, very narrow, enlarged, keel-shaped in basal region. Cirrus I with anterior and posterior rami equal length; cirrus II-VI long, slender; cirrus VI with small caudal appendages. Penis with few long hairs towards tip. Maxillule notched, with strong teeth on upper side; mandible with four teeth; labrum with row of small teeth on crest. Measurements of specimen: basal diameter of capitulum 1.45 mm; capitular height 10.44 mm; total height 13.99 mm; scutal width 4.79 mm; scutal length 9.01 mm; tergal width 1.87 mm; tergal length 5.07 mm. Distribution. West-southwest Pacific: from Australia (Sydney) to Indonesia (Sumbawa) and the Philippines (northwest Panay Island); East Indian Ocean; attached to glassy spicule of hexactinellid sponge, fragments of sea urchin tests, spines of cidarids; 395-935 m depth ( Jones and Hosie 2016 ). In this study, Glyptelasma gracile was found at Tanimbar Island, Indonesia. Type locality. Challenger expedition Station 164a (off Sydney, Australia); 34°13'S , 151°38'E ; depth 125 m; bottom: grey ooze ( Hoek 1883 ). Figure 7. Glyptelasma gracile (Hoek, 1883) (MNHN-IU-2019-4875). a . left lateral view, capitulum and peduncle; b. right lateral view, capitulum and peduncle; c. anterior view, orifice; d. posterior view, carina. Scale bar: 2 mm ( a-d ).