New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism
In the Asellota, sexual dimorphism is often characterized by males that show pronounced morphological differences after thefinal moult compared to females but also to sub-adult males. Such a sexual dimorphism may strongly complicate allocation ofthese terminal males to conspecifics. Consequently, we...
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ftmagnoliapress:oai:ojs.mapress.com:article/13307 2023-05-15T17:34:07+02:00 New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism RIEHL, TORBEN WILSON, GEORGE D. F. HESSLER, ROBERT R. 2012-04-24 application/pdf https://www.mapress.com/j/zt/article/view/zootaxa.3277.1.1 https://doi.org/10.11646/zootaxa.3277.1.1 eng eng Mangolia Press https://www.mapress.com/j/zt/article/view/zootaxa.3277.1.1/22513 Copyright (c) 2016 Magnolia press Zootaxa; Vol 3277, No 1: 24 Apr. 2012; 1–26 1175-5334 1175-5326 10.11646/zootaxa.3277.1 Crustacea Janiroidea deep sea benthos bathyal abyssal North Atlantic DELTA SEM new species info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftmagnoliapress https://doi.org/10.11646/zootaxa.3277.1.1 2019-04-02T14:59:57Z In the Asellota, sexual dimorphism is often characterized by males that show pronounced morphological differences after thefinal moult compared to females but also to sub-adult males. Such a sexual dimorphism may strongly complicate allocation ofthese terminal males to conspecifics. Consequently, we regard it to be a likely explanation for why in 50% of the described spe-cies of the family Macrostylidae Hansen, 1916, only one sex is known. Based on detailed description of two previouslyunknown species of the isopod genus Macrostylis Sars, 1864, the changes in the morphology that can occur during the finalmoult of the males are highlighted. M. dorsaetosa n. sp. is unlike any other species owing to the row of spine-like setae on theposterior margins of pereonites 5–6. M. strigosa Mezhov, 1999 shows remarkable similarity but lacks these setae. In M. papil-lata n. sp., cuticular ridges overlap posteriorly with the margin of the pereonites 1–4 and head forming a warty appearance. Thisspecies is easily identifiable and unlike any previously described macrostylid owing to the presence of the tergal articulationbetween pleonite 1 and pleotelson. Information for the identification of terminal males is provided and implications of our results for future taxonomic and systematic work on this isopod family are discussed. Article in Journal/Newspaper North Atlantic Magnolia press Zootaxa 3277 1 1 |
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collection |
Magnolia press |
op_collection_id |
ftmagnoliapress |
language |
English |
topic |
Crustacea Janiroidea deep sea benthos bathyal abyssal North Atlantic DELTA SEM new species |
spellingShingle |
Crustacea Janiroidea deep sea benthos bathyal abyssal North Atlantic DELTA SEM new species RIEHL, TORBEN WILSON, GEORGE D. F. HESSLER, ROBERT R. New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
topic_facet |
Crustacea Janiroidea deep sea benthos bathyal abyssal North Atlantic DELTA SEM new species |
description |
In the Asellota, sexual dimorphism is often characterized by males that show pronounced morphological differences after thefinal moult compared to females but also to sub-adult males. Such a sexual dimorphism may strongly complicate allocation ofthese terminal males to conspecifics. Consequently, we regard it to be a likely explanation for why in 50% of the described spe-cies of the family Macrostylidae Hansen, 1916, only one sex is known. Based on detailed description of two previouslyunknown species of the isopod genus Macrostylis Sars, 1864, the changes in the morphology that can occur during the finalmoult of the males are highlighted. M. dorsaetosa n. sp. is unlike any other species owing to the row of spine-like setae on theposterior margins of pereonites 5–6. M. strigosa Mezhov, 1999 shows remarkable similarity but lacks these setae. In M. papil-lata n. sp., cuticular ridges overlap posteriorly with the margin of the pereonites 1–4 and head forming a warty appearance. Thisspecies is easily identifiable and unlike any previously described macrostylid owing to the presence of the tergal articulationbetween pleonite 1 and pleotelson. Information for the identification of terminal males is provided and implications of our results for future taxonomic and systematic work on this isopod family are discussed. |
format |
Article in Journal/Newspaper |
author |
RIEHL, TORBEN WILSON, GEORGE D. F. HESSLER, ROBERT R. |
author_facet |
RIEHL, TORBEN WILSON, GEORGE D. F. HESSLER, ROBERT R. |
author_sort |
RIEHL, TORBEN |
title |
New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
title_short |
New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
title_full |
New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
title_fullStr |
New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
title_full_unstemmed |
New Macrostylidae Hansen, 1916 (Crustacea: Isopoda) from the Gay Head-Bermuda transect with special consideration of sexual dimorphism |
title_sort |
new macrostylidae hansen, 1916 (crustacea: isopoda) from the gay head-bermuda transect with special consideration of sexual dimorphism |
publisher |
Mangolia Press |
publishDate |
2012 |
url |
https://www.mapress.com/j/zt/article/view/zootaxa.3277.1.1 https://doi.org/10.11646/zootaxa.3277.1.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Zootaxa; Vol 3277, No 1: 24 Apr. 2012; 1–26 1175-5334 1175-5326 10.11646/zootaxa.3277.1 |
op_relation |
https://www.mapress.com/j/zt/article/view/zootaxa.3277.1.1/22513 |
op_rights |
Copyright (c) 2016 Magnolia press |
op_doi |
https://doi.org/10.11646/zootaxa.3277.1.1 |
container_title |
Zootaxa |
container_volume |
3277 |
container_issue |
1 |
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1 |
_version_ |
1766132840496365568 |