 |
| Landouria strobiloides
C. Tumpeesuwan & S. Tumpeesuwan, 2019
RAFFLES BULLETIN OF ZOOLOGY. 67.
|
Abstract
A new species of land snail is described from the Suan Hin Pha Ngam Limestone Area in Loei Province, northeastern Thailand. This species is placed in the genus Landouria Godwin-Austen, 1918 based on the presence of a slightly long club-shaped flagellum with variably sized tubercles, a gametolytic sac with swollen basal part, and absence of dart sacs and mucous glands. This is the first verified record of the genus Landouria in Thailand.
Key words. new species, Landouria, Aegista, Thaitropis, reproductive anatomy, Loei Province, Thailand
 |
| Fig. 2. Living specimen of Landouria strobiloides, new species. Photograph by: Benchawan Nahok. |
 |
| Fig. 3. Empty shell of Landouria strobiloides, new species, holotype (NHMSU-00017). Photograph by: Benchawan Nahok. |
Superfamily Helicoidea Rafinesque, 1815
Family Camaenidae Pilsbry, 1895
Genus Landouria Godwin-Austen, 1918
Landouria strobiloides, new species
Diagnosis. Body whorl of shell with very sharp keeled, aperture slightly thickened and with a reflexed rim. Flagellum slightly long, club-shaped, with variably-sized tubercles. Base of gametolytic sac enlarged and swollen.
...
Etymology. The specific epithet strobiloides derived from the strobilus, referring to the flagellum of the new species, which looks similar to the strobilus of non-flowering plants because it possesses many tubercles on its surface.
Remarks. The genitalia of the new species agree in general detail with the genital anatomy of congeneric species, but it has the longest tubercles on the flagellum within the genus. The anatomy of Landouria differs from Aegista by the absence of a well-developed dart sac, lateral accessory sacs, and mucous glands (Schileyko, 2004). In Thailand, the snails that have the last whorl slightly descending in front and large umbilicus were assigned to Aegista, but this needs to be confirmed by a study of their anatomical characters.
Chanidaporn Tumpeesuwan and Sakboworn Tumpeesuwan. 2019. First Verified Record of the Genus Landouria Godwin-Austen, 1918 from Thailand (Gastropoda: Stylommatophora: Camaenidae) with Description of A New Species. RAFFLES BULLETIN OF ZOOLOGY. 67; 298–305. lkcnhm.nus.edu.sg/app/uploads/2018/11/RBZ-2019-0021.pdf
Takahiro Hirano, Yuichi Kameda, Kazuki Kimura and Satoshi Chiba. 2014. Substantial Incongruence Among the Morphology, Taxonomy, and Molecular Phylogeny of the Land Snails Aegista, Landouria, Trishoplita, and Pseudobuliminus (Pulmonata: Bradybaenidae) occurring in East Asia. Molecular Phylogenetics and Evolution. 70; 171-181. DOI: 10.1016/j.ympev.2013.09.020
