Hostname: page-component-84b7d79bbc-lrf7s Total loading time: 0 Render date: 2024-07-28T06:40:26.940Z Has data issue: false hasContentIssue false
  • English
  • Français

Sitophilus sasakii (Tak.) (Coleoptera: Curculionidae) in Canada: Anatomy and Mycetomal Symbiotes as Valid Taxonomic Characters1

Published online by Cambridge University Press:  31 May 2012

A. J. Musgrave  and
R. Homan
A. J. Musgrave
Affiliation:
Department of Zoology, Ontario Agricultural College, Guelph, Ontario
R. Homan
Affiliation:
Department of Zoology, Ontario Agricultural College, Guelph, Ontario
Get access Rights & Permissions [Opens in a new window]

Extract

Large and small strains of the rice weevil Sitophilus oryza (L.) (Calandra oryzae (L.) of authors following European usage) have been reported from several localities (Birch, 1944 in Australia; Kiritani, 1956 in Japan; Kono, 1955 in Nepal; Richards 1944 in Britain; and Utida, 1958, in Canada, Japan and U.S.A.). Birch and Richards both seem to have considered it probable that the two strains were separate species: but they did not make the separation. Floyd and Newsom (1960), after careful work on both strains found in the U.S. and reared in the laboratory on a variety of materials, decided that the small strain could be validly made a separate species, thus agreeing with Takahashi who, according to Floyd and Newsom (1960), had elevated this strain to species rank as Calandra sasakii. In conformity with modern North American usage Floyd and Newsom refer to this small species as Sitophilus sasakii (Tak.). In addition to differences in size, they found differences in the male and female genitalia, interstrain sterility and various ecological differences. There were also differences in pronotal markings as had been, according to Kono (1953), noted by Takahashi (1928). Kono states “…the adult of the large strain has pits dotted densely on the central part of the pronotum, the small strain does not, and, furthermore the shape and size of the pits differ distinctly”.

Type
Articles
Information
The Canadian Entomologist , Volume 94 , Issue 11 , November 1962 , pp. 1196 - 1197
Copyright
Copyright © Entomological Society of Canada 1962

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Birch, L. C. 1944. Two strains of Calandra oryzae L. (Coleoptera). Aust. J. Exp. Biol. Med. Sci. 22: 271–275.CrossRefGoogle Scholar
Cameron, Thomas W. M. 1956. Parasites and Parasitism. Methuen and Company Limited, London (see p. 280).Google Scholar
Floyd, E. H. and Newsom, L. D.. 1960. Biological study of the rice weevil complex. Ann. Ent. Soc. Amer. 52: 687–695.CrossRefGoogle Scholar
Kiritani, K. 1956. On the local distribution of two allied species of the rice weevil Calandra oryzae and Calandra sasakii. Japanese J. Appl. Zool. 21 (2): 74–77Google Scholar
per Rev. Appl. Ent. (A) 46: 208–209.Google Scholar
Kono, Tatsuro. 1955. Rice weevil. Fauna and flora of Nepal Himalaya. Scientific results of the Japanese Expeditions to Nepal Himalaya 1952-53. Vol. 1: 383–385.Google Scholar
Musgrave, A. J. and Miller, J. J.. 1953. Some micro-organisms associated with the weevils Sitophilus granarius (L.) and Sitophilus oryza (L.). I. Distribution and description of the organisms. Canad. Ent. 85: 387–390.CrossRefGoogle Scholar
Musgrave, A. J. and Miller, J. J.. 1958. Studies of the association between strains and species of Sitophilus weevils and their mycetomal micro-organisms. Proc. Xth Intern. Congr. Entomol. 2: 315–318.Google Scholar
Richards, O. W. 1944. The two strains of the rice weevil Calandra oryzae (L.). (Coleopt., Curculionidae). Trans. R. Ent. Soc. Lond. 94: 187–200.CrossRefGoogle Scholar
Utida, Syundro. 1958. Distribution of the small rice weevil in the United States. J. Econ. Ent. 51: 913.CrossRefGoogle Scholar