Resolving phylogenetic and classical nomenclature: A revision of Seraphsidae Jung, 1974 (Gastropoda: Neostromboidae) Author Maxwell, Stephen J. 0000-0002-4328-6171 College of Science and Engineering, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia. & Stephen. maxwell @ my. jcu. edu. au; https: // orcid. org / 0000 - 0002 - 4328 - 6171 tephen.maxwell@my.jcu.edu.au Author Rymer, Tasmin L. 0000-0002-9963-6345 College of Science and Engineering, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia. & Centre for Tropical Environmental and Sustainability Sciences, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia. & Tamsin. rymer @ jcu. edu. au; https: // orcid. org / 0000 - 0002 - 9963 - 6345 amsin.rymer@jcu.edu.au Author Congdon, Bradley C. 0000-0002-8751-0892 College of Science and Engineering, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia. & Centre for Tropical Environmental and Sustainability Sciences, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia. & brad. congdon @ jcu. edu. au; https: // orcid. org / 0000 - 0002 - 8751 - 0892 brad.congdon@jcu.edu.au text Zootaxa 2021 2021-06-22 4990 3 401 453 journal article 5563 10.11646/zootaxa.4990.3.1 6a6dd89d-6b74-47ed-ba8e-71b526355b69 1175-5326 5026777 70610FEE-4497-4804-817C-CEC2D66DDBFE Seraphs leukoleptus Jung, 1974 Figure 4G 1880 Terebellum ( Seraphs ) fusiformopse de Gregorio , p. 22, pl. 1, fig. 17. Cossmann 1889 , p. 93 , pl. 3, figs. 3, 4. Caze et al. 2010 , p. 438 . 1974 Seraphs ( Seraphs ) leukoleptus Jung , p. 23, pl. 6, figs. 1–3, tf. 17. = Seraphs leukoleptus Jung — Pacaud 2008 , p. 727. Caze et al. 2010 , p. 438, figs. 11F, H, I, and 13A–H. Type material. Neotype — MNHN no. A28781 was selected by Caze et al. (2010) to bring taxonomic clarity, given the Jung (1974) type could not be found. The latter specimen, according to Jung, measures 27.6 mm in length, with a width of 6.2 mm . Type locality. Chaussy , France [Lutetian] . Diagnosis. The shell is convolute, slender, becoming broader towards the base with the widest part just above the base. The surface of the shell is smooth with a few faint basal spiral sulci. The columella is slightly bent backward near the base. The labial callus is conspicuous, reaching the apex, and is separated from the surface of the shell. The labrum is straight in profile and slightly opisthocline. The base of the labrum is only slightly above the base of the columella. Distribution. EOCENE—Lutetian— France Chaussy ( Jung 1974 ; Caze et al. 2010 ). Remarks. This species represents a transitional species between the two genera Seraphs and Paraseraphs based on the shape and form of the canal, which demonstrates the early stages of evolute terminal growth ( Jung 1974 ).