VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL.
The 321 individuals of Hantzschia amphioxys were collected from the Ongul Islands of the Antarctic in January, 1959. Microphotographs of them were taken to investigate their variations. Many varieties were found. For example, some had shells with straight ventral and dorsal margins; some with straig...
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| Format: | Article |
| Language: | English |
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National Institute of Polar Research
1963-01-01
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| Series: | Antarctic Record |
| Online Access: | https://doi.org/10.15094/00007217 |
| _version_ | 1819200065397325824 |
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| author | Tsuyako KO-BAYASHI |
| author_facet | Tsuyako KO-BAYASHI |
| author_sort | Tsuyako KO-BAYASHI |
| collection | DOAJ |
| description | The 321 individuals of Hantzschia amphioxys were collected from the Ongul Islands of the Antarctic in January, 1959. Microphotographs of them were taken to investigate their variations. Many varieties were found. For example, some had shells with straight ventral and dorsal margins; some with straight ventral margin and convex dorsal margin, or vice versa; some with concave ventral margin and convex dorsal margin. In any case, these varieties were linked with many intermediate forms. Therefore, Hantzschia amphioxys of East Ongul Island should be identified as var. recta. There were some individuals which seemed to have some similarities with forma capitate among the collected materials. Generally, var. capitate is a little smaller than var. recta. The measurement of Hantzschia amphioxys of East Ongul Island is: Length of shell : 60-120μ Width of shell : 8-11μ Number of keels in 10μ : 4-10 Number of striae in 10μ : 18-23 The materials of East Ongul Island were larger in size that the materials recorded in the past; however, the number of their keels and striae were less. The specific name of Hantzschia amphioxys f. capitate 0. Muller (not Pantocsek) was corrected to Hantzschia amphioxys var. amphioxys f. mulleri. |
| first_indexed | 2024-12-23T03:26:18Z |
| format | Article |
| id | doaj.art-c2962aabbbd84803abadb77022e12cdd |
| institution | Directory Open Access Journal |
| issn | 0085-7289 2432-079X |
| language | English |
| last_indexed | 2024-12-23T03:26:18Z |
| publishDate | 1963-01-01 |
| publisher | National Institute of Polar Research |
| record_format | Article |
| series | Antarctic Record |
| spelling | doaj.art-c2962aabbbd84803abadb77022e12cdd2022-12-21T18:01:50ZengNational Institute of Polar ResearchAntarctic Record0085-72892432-079X1963-01-01171489149310.15094/00007217VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL.Tsuyako KO-BAYASHI0Biological Institute, Yokohama Municipal UniversityThe 321 individuals of Hantzschia amphioxys were collected from the Ongul Islands of the Antarctic in January, 1959. Microphotographs of them were taken to investigate their variations. Many varieties were found. For example, some had shells with straight ventral and dorsal margins; some with straight ventral margin and convex dorsal margin, or vice versa; some with concave ventral margin and convex dorsal margin. In any case, these varieties were linked with many intermediate forms. Therefore, Hantzschia amphioxys of East Ongul Island should be identified as var. recta. There were some individuals which seemed to have some similarities with forma capitate among the collected materials. Generally, var. capitate is a little smaller than var. recta. The measurement of Hantzschia amphioxys of East Ongul Island is: Length of shell : 60-120μ Width of shell : 8-11μ Number of keels in 10μ : 4-10 Number of striae in 10μ : 18-23 The materials of East Ongul Island were larger in size that the materials recorded in the past; however, the number of their keels and striae were less. The specific name of Hantzschia amphioxys f. capitate 0. Muller (not Pantocsek) was corrected to Hantzschia amphioxys var. amphioxys f. mulleri.https://doi.org/10.15094/00007217 |
| spellingShingle | Tsuyako KO-BAYASHI VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. Antarctic Record |
| title | VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. |
| title_full | VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. |
| title_fullStr | VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. |
| title_full_unstemmed | VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. |
| title_short | VARIABILITY OF HANTZSCHIA AMPHIOXYS (EHR.) GRUN. VAR. RECTA O. MULL. |
| title_sort | variability of hantzschia amphioxys ehr grun var recta o mull |
| url | https://doi.org/10.15094/00007217 |
| work_keys_str_mv | AT tsuyakokobayashi variabilityofhantzschiaamphioxysehrgrunvarrectaomull |