Oligodendrorhynchus hesperides gen. et sp. n. (Heteronemertea) from the Bellingshausen Sea
Oligodendrorhynchus hesperides gen. et sp. n. (Heteronemertea) from the Bellingshausen Sea A new genus and species of heteronemertean from the Antarctic (Bellingshausen Sea), Oligodendrorhynchus hesperides , is described and illustrated. Some morphological features with major systematic significance...
Published in: | Polish Polar Research |
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Walter de Gruyter GmbH
2012
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Subjects: | |
Online Access: | http://dx.doi.org/10.2478/v10183-012-0006-3 http://content.sciendo.com/view/journals/popore/33/1/article-p81.xml https://www.degruyter.com/view/j/popore.2012.33.issue-1/v10183-012-0006-3/v10183-012-0006-3.pdf |
Summary: | Oligodendrorhynchus hesperides gen. et sp. n. (Heteronemertea) from the Bellingshausen Sea A new genus and species of heteronemertean from the Antarctic (Bellingshausen Sea), Oligodendrorhynchus hesperides , is described and illustrated. Some morphological features with major systematic significance are following: the mode of branching of the proboscis and its low number of terminal branches; the lack of horizontal lateral cephalic slits but in their place a pair of shallow epidermal depressions; a gelatinous amorphous connective stratum between the outer longitudinal and circular muscle layers; the presence of a rhynchocoelic nerve; isolated fibres of the rhynchocoel circular muscle layer interwoven with bundles of the adjacent body-wall inner longitudinal muscle fibres in the intestinal region. Other anatomical characters which can also be used to distinguish the new taxon from existing heteronemertean species that have a branched proboscis are also discussed. |
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