Dyakia janus

Taxonavigation

Taxonavigation: Trochomorphoidea

Superregnum: Eukaryota Cladus: Unikonta Cladus: Opisthokonta Cladus: Holozoa Regnum: Animalia Subregnum: Eumetazoa Cladus: Bilateria Cladus: Nephrozoa Cladus: Protostomia Cladus: Spiralia Cladus: Lophotrochozoa Phylum: Mollusca Classis: Gastropoda Subclassis: Heterobranchia Infraclassis: Euthyneura Cohors: Tectipleura Subcohors: Panpulmonata Superordo: Eupulmonata Ordo: Stylommatophora Subordo: Helicina Infraordo: Limacoidei Superfamilia: Trochomorphoidea

Familia: Dyakiidae
Genus: Dyakia
Species: Dyakia janus

Name

Dyakia janus (Beck, 1837: 5)

Neotype: BMNH 42.5.10.1463

Type locality: Südsee (=Islands of South Sea) and Java.

Mentions

• Helix Ianus bifrons Chemnitz, 1795: 307, 308, pl. 213, Figs. 3016, 3017, type locality: Südsee [Rejected species-group name by the commission (ICZN, 1944: Opinion 184)]
• Nanina (Ariophanta) janus Beck, 1837: 5.
• Helix janus Pfeiffer, 1847: 88, 89, pl. 11, Figs. 4–6; Pfeiffer, 1848: 77
• Helix sannio Pfeiffer, 1854: 57, type locality: unknown; Pfeiffer, 1859: 253
• Nanina albersi Martens, 1864: 265, type locality: Malakka; Martens, 1867: 224, 225, pl. 2, Fig. 3; Tryon, 1886: 20, pl. 3, Fig. 37
• Nanina sannio Tryon, 1886: 18, pl. 2, Fig. 26
• Nanina janus Tryon, 1886: 19, pl. 3, Figs. 34, 36
• Dyakia albersi Gude, 1903: 49
• Dyakia sannio Laidlaw, 1931: 191, 201; Laidlaw, 1933: 234; Laidlaw, 1963: 146; Maassen, 2001: 107
• Dyakia janus Laidlaw, 1931: 192, 200; Laidlaw, 1933: 226; Laidlaw, 1963: 141, 142; Maassen, 2001: 105

References

• Beck, H., 1837: Index Molluscorum Praesentis Aevi Musei Principis Augustissimi Christiani Frederici. Hafniae, Hanover. 170 pp.

---

• Chirasak Sutcharit, Piyoros Tongkerd, Shau-Hwai Aileen Tan & Somsak Panha. 2012: Taxonomic revision of Dyakia janus from Peninsular Malaysia (Pulmonata: Dyakiidae), with notes on other sinistrally coiled helicarionoids. Raffles bulletin of zoology, 60(2): 279–287. PDF.