Lentge-MAAss, Nora; Neiber, Marco T.; Gimnich, France; Glaubrecht, Matthias
Zoological Journal of the Linnean Society
Evolutionary systematics of the viviparous gastropod Sermyla (Gastropoda: Cerithioidea: Thiaridae), with the description of a new species
Figure 1. A–AB, shell morphology of Sermyla: A–O, Sermyla riquetii; P–T,Sermyla kupaensis; U–AB, Sermyla carbonata.A, syntype of Sermyla riquetii (Grateloupe, 1840), ‘Batavia’ (BMNH 1907.11.22.40); B, syntype of Sermyla riquetii (Grateloupe, 1840), ‘Batavia’ (BMNH 1907.11.22.41); C, syntype of Melania harpula Dunker, 1844 (ZMB 109669); D, syntype of Melania mitra Dunker, 1844 (ZMB 109670); E, original drawing of Melania semicostata Philippi 1847; F, syntype of Melania tornatella Lea & Lea, 1851 (BMNH 1978155); G, syntype of Melania sculpta Souleyet, 1852 (BMNH 1854.7.24.381); H, holotype of Sermyla kowloonensis Chen, 1943 (USNM 48041); I, S. riquetii from Bali, Gumbrih River (ZMB 106474-3); J, S. riquetii from Thailand, Puek Tian Beach (ZMB 107883-11); K, S. riquetii from Thailand, Perchaburi (ZMB 127817-2); L, S. riquetii from Thailand, Samut Songkhram (ZMB 127818-2); M, S. riquetii from Vietnam, Hue (ZMB 114421–5); N, S. cf. riquetii from Australia: QLD, Caloundra (AMS C.3215-1); O, S. cf. riquetii from Australia: QLD, Caloundra (AMS C.3215-2); P, holotype of Sermyla kupaensis from Indonesia, Kupa River (MZB Gst. 12.191); Q, paratype of Sermyla kupaensis ZMB 191388-4); R, paratype of Sermyla kupaensis (ZMB 191388-10); S, paratype of Sermyla kupaensis (ZMB 191388-5); T, paratype of Sermyla kupaensis (ZMB 191388-7); U, syntype of Sermyla carbonata (Reeve, 1859), ‘Port Essington’ (BMNH 2001.0762); V, syntype of Melania venustula Brot, 1877, ‘Port Denison’ (MNHG, no number); W, holotype of Sermylasma prognata Iredale, 1943, Australia, Victoria River (BMNH 1857.9.30.8-1); X, S. carbonata, Australia: Bundara Sinkhole (BES 10048); Y, S. carbonata, Australia, Howard Springs (ZMB 107630–2); Z, S. carbonata, Australia, Roper River (ZMB 107616-1); AA, S. carbonata, Australia, Roper Bar (ZMB 192017-1); AB, S. carbonata, Australia, Norman River (107209-5).
Figure 4. Shape differences of populations of S. riquetii, S. carbonata and S. kupaensis. Principle component analysis (PCA) for the configuration of 15 landmarks of S. kupaensis from Sulawesi, S. riquetii from Bali, Vietnam and Thailand, S. cf. riquetii from Australia, as well as S. carbonata in the different drainage systems of Australia. Five-pointed star: syntype of S. riquetii; nine-pointed star: syntypes of S. carbonata; six-pointed stars: syntypes of M. venustula; triangle tip down: holotype of S. prognata.
Figure 11. Anatomy of the radula in Sermyla. A, rachis and lateralia of Sermyla kupaensis (ZMB 191388). B, marginalia of Sermyla kupaensis (ZMB 191388). C, rachis and lateralia of S. riquetii (BMNH 2403). D, marginalia of S. riquetii (BMNH 2403). E, rachis and lateralia of S. carbonata (ZMB 106700). F, marginalia of S. carbonata (ZMB 106700).
Figure 5. Morphological differences of Sermyla kupaensis, S.riquetii and S. carbonata populations. A, boxplots for the height measurements of Sermyla kupaensis, S.riquetii and S. carbonata from the different sampling locations and river systems. Five-pointed star: syntypes of S. riquetii; six-pointed stars: syntypes of M. venustula; triangle tip down: holotype of S. prognata; nine-pointed star: syntypes of S. carbonata. B, boxplots for the total amount of juveniles inside the brood pouch of S.riquetii and S. carbonata from different sampling locations and drainage systems, as well as a veliger larva from Sermyla kupaensis for comparison.
Figure 2. Geographic range of S. riquetii (circles), S. kupaensis (hexagon) and S. carbonata (squares) with a colour-code for the different drainage systems in Australia. Black squares: sequenced, ethanol preserved material of S. carbonata; white squares: dry shells of S. carbonata; black circles: sequenced, ethanol preserved material of S. riquetii; white circles: dry shells of S. riquetii; black hexagon: sequenced, ethanol-preserved material of S. kupaensis; white hexagon: dry shells of S. kupaensis; five-pointed stars: type localities of 1 = S. riquetii, 2 = S. kupaensis, 3 = S. carbonata, 4 = M. venustula.
Klong Lung Wat Thai & Pak Bang & Ratapun