A propos d'une forme stomatoporienne typique,Stomatopora gingrinaJullien, 1882 (Bryozoaires Cyclostomes), et de son gonzoïde
| Autor: | J.G. Harmelin |
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| Rok vydání: | 1974 |
| Předmět: | |
| Zdroj: | Journal of Natural History. 8:1-9 |
| ISSN: | 1464-5262 0022-2933 |
| DOI: | 10.1080/00222937400770011 |
| Popis: | Summary Description of a typical uniserial form of Stomatopora referred to the recent species S. gingrina Jullien, 1882. Abundant material including fertile specimens was collected in bathial depths (600–1400 m) in the Atlantic, mainly North West of Spain. The budding pattern is that found in the fossil species group dichotoma-dichotomoides-bifurca as defined by Illies (1971); lateral peristomial budding occurs under particular topographical conditions. The gonozoid, observed here for the first time in a strictly uniserial species, has the shape of an inflated sac laterally adnate to the upper part of an autozoidal peristome. The gonozoid differs from the general type because it does not present a narrow proximal part. This latter feature is in correlation with its peristomial origin. The ooeciostome is a short distal tube opening upward. According to the coefficient of variation within four series of measurements, three parameters—peristomes diameter, length of the autozoids adnate portion, width of the ... |
| Databáze: | OpenAIRE |
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