Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles
A new ascothoracid, Isidascus bassindalei gen.nov., sp.nov., has been discovered in the north-east Atlantic Ocean at a depth of over 2000 m. It forms permanent galls on the branches of Acanella arbuscula , a gorgonian of the Family Isidae (Octocorallia, Coelenterata). The new genus is related to Gor...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1983
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0025315400049869 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400049869 |
id |
crcambridgeupr:10.1017/s0025315400049869 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0025315400049869 2024-03-03T08:47:11+00:00 Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles Moyse, John 1983 http://dx.doi.org/10.1017/s0025315400049869 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400049869 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 63, issue 1, page 161-180 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1983 crcambridgeupr https://doi.org/10.1017/s0025315400049869 2024-02-08T08:24:02Z A new ascothoracid, Isidascus bassindalei gen.nov., sp.nov., has been discovered in the north-east Atlantic Ocean at a depth of over 2000 m. It forms permanent galls on the branches of Acanella arbuscula , a gorgonian of the Family Isidae (Octocorallia, Coelenterata). The new genus is related to Gorgonolaureus , species of which form galls on paramuriceid gorgonians. The gall of the present form unlike that of Gorgonolaureus incorporates a cup of host calcite. Twenty-three adult female specimens and one male were examined in this study. The adult parasite is characterized by elevated humps in a median dorsal position on each of thoracomeres 2,3 and 4. A further feature is a tapering filamentary appendage arising near the base of first thoracopod. The parasite apparently feeds on its host's coenosarc. The likely function of the first and second antennae and each of the three pairs of stylet-form mouth parts is suggested. A case is made for interpretting the species as a protandrous sequential hermaphrodite. Whilst still immature, protanders apparently seek out and settle alongside an adult female. Later, following growth and sexual maturation they again become mobile and after copulation with the nearby female depart to prepare for sex change on a separate branch of the host. Article in Journal/Newspaper North East Atlantic Cambridge University Press Humps ENVELOPE(-57.450,-57.450,-63.983,-63.983) Journal of the Marine Biological Association of the United Kingdom 63 1 161 180 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Moyse, John Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
topic_facet |
Aquatic Science |
description |
A new ascothoracid, Isidascus bassindalei gen.nov., sp.nov., has been discovered in the north-east Atlantic Ocean at a depth of over 2000 m. It forms permanent galls on the branches of Acanella arbuscula , a gorgonian of the Family Isidae (Octocorallia, Coelenterata). The new genus is related to Gorgonolaureus , species of which form galls on paramuriceid gorgonians. The gall of the present form unlike that of Gorgonolaureus incorporates a cup of host calcite. Twenty-three adult female specimens and one male were examined in this study. The adult parasite is characterized by elevated humps in a median dorsal position on each of thoracomeres 2,3 and 4. A further feature is a tapering filamentary appendage arising near the base of first thoracopod. The parasite apparently feeds on its host's coenosarc. The likely function of the first and second antennae and each of the three pairs of stylet-form mouth parts is suggested. A case is made for interpretting the species as a protandrous sequential hermaphrodite. Whilst still immature, protanders apparently seek out and settle alongside an adult female. Later, following growth and sexual maturation they again become mobile and after copulation with the nearby female depart to prepare for sex change on a separate branch of the host. |
format |
Article in Journal/Newspaper |
author |
Moyse, John |
author_facet |
Moyse, John |
author_sort |
Moyse, John |
title |
Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
title_short |
Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
title_full |
Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
title_fullStr |
Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
title_full_unstemmed |
Isidascus bassindalei gen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles |
title_sort |
isidascus bassindalei gen.nov., sp.nov. (ascothoracida: crustacea) from north-east atlantic with a note on the origin of barnacles |
publisher |
Cambridge University Press (CUP) |
publishDate |
1983 |
url |
http://dx.doi.org/10.1017/s0025315400049869 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400049869 |
long_lat |
ENVELOPE(-57.450,-57.450,-63.983,-63.983) |
geographic |
Humps |
geographic_facet |
Humps |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 63, issue 1, page 161-180 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400049869 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
63 |
container_issue |
1 |
container_start_page |
161 |
op_container_end_page |
180 |
_version_ |
1792503345454252032 |