WoRMS source details

Pillai, T. Gottfried. (1970). Studies on a collection of Spirorbids from Ceylon, together with a critical review and revision of Spirorbid systematics, and an account of their phylogeny and zoogeography. Ceylon Journal of Science (Biological Sciences). 8(2): 100-172.
Pillai, T. Gottfried
Studies on a collection of Spirorbids from Ceylon, together with a critical review and revision of Spirorbid systematics, and an account of their phylogeny and zoogeography
Ceylon Journal of Science (Biological Sciences)
8(2): 100-172
World Polychaeta Database (WPolyDb)
Available for editors  PDF available [request]
1. The spirorbids reported earlier from Ceylon are reviewed. 2. A further collection of spirorbids from Ceylon, consisting of six new species, is described. 3. Detailed studies of the growth stages of their opercula were carried out. It was found that although the opercula of old adults appear to differ little between certain species, their growth stages show remarkable differences. 4. Keys to the Spirorbidae of Ceylon are provided. 5. The views hitherto held on the systematics of spirorbids are critically reviewed. 6. The characters hitherto used in their systematics are critically reviewed. 7. The characters of generic and specific value are categorized. 8. The spirorbids are classified according to genera and species, with definitions for the genera. New genera are proposed wherever necessary. 9. The advantages of the above classification are discussed. 10. The position of spirorbids as a group is reviewed. Characters common to the non-spirorbid Serpulidae and those which are not common to them are reviewed. 11. The differences between spirorbids and Serpulidae outnumber the similarities and are of such magnitude as to justify the separation of spirorbids into a distinct family. Hence a new family the Spirorbidae is created for this group. The family characters are defined. 12. The views hitherto expressed on the phylogeny of the Spirorbidae are reviewed. 13. A new phylogenetic scheme is proposed. 14. The advantages of this new phylogenetic scheme are discussed. 15. The geographical distribution of the Spirorbidae is discussed. 16. The pattern of distribution of the genera and species of the Spirorbidae is correlated with current knowledge on palaeozoology, palaeogeography and palaeoclimatology.
Indian Ocean
Systematics, Taxonomy
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2013-01-12 18:30:12Z
2020-10-21 01:22:32Z


See the Spirorbinae entry for literature contributing to the genus-level classification within spirorbins [details]


Pillai (1970) raised Spirorbinae from the original subfamily rank to separate family rank, but this usage in the ... [details]


Original diagnosis (Pillai, 1970): Tube sinistral. Thorax with 3 setigers. Collar setae with a finlike basal ... [details]

 Grammatical gender

Dexiospira should be feminine as most 'spira' genus names are treated as feminine with their adjectival species ... [details]


Unnecessary subgenus name for the nominal subgenus Spirorbis (Spirorbis). The first species listed by Caullery & ... [details]


Pillai (1970) raised Chamberlin's Spirorbinae to family level. This rank was widely used, but now has no support ... [details]

 Type species

The type species of Neodexiospira is Spirorbis formosus Bush, 1905 accepted as Neodexiospira formosa (Bush, 1905) ... [details]