Stenopsella fenestrata
Stenopsella fenestrata (Smitt, 1873) (Fig. 9; Table 7) Hippothoa fenestrata Smitt, 1873: 47, pl. 6, fig. 142. Stenopsella fenestrata : Bassler 1952: 385. Material examined. Holotype by monotypy SMNH-Type-1800, North Atlantic Ocean, S of Tortugas, United States, depth 31 m. Leg. Gulf Stream Explorati...
Main Author: | |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
Zenodo
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5281/zenodo.6424516 http://treatment.plazi.org/id/038254222A2744528A9FF8802C33FC6A |
id |
ftzenodo:oai:zenodo.org:6424516 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:6424516 2024-09-15T18:24:10+00:00 Stenopsella fenestrata Martino, Emanuela Di 2022-04-08 https://doi.org/10.5281/zenodo.6424516 http://treatment.plazi.org/id/038254222A2744528A9FF8802C33FC6A unknown Zenodo https://doi.org/10.11646/zootaxa.5125.2.4 http://zenodo.org/record/6424502 http://publication.plazi.org/id/FFBB2C5A2A3744408A08FFB82F56FFA3 https://sibils.text-analytics.ch/search/collections/plazi/038254222A2744528A9FF8802C33FC6A https://www.gbif.org/species/194520095 https://www.checklistbank.org/dataset/55213/taxon/038254222A2744528A9FF8802C33FC6A.taxon https://doi.org/10.5281/zenodo.6424528 http://zoobank.org/6DDA279A-FA5F-4993-98DD-FC40133292BB https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.6424515 https://doi.org/10.5281/zenodo.6424516 oai:zenodo.org:6424516 http://treatment.plazi.org/id/038254222A2744528A9FF8802C33FC6A info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Revision of the type species of some cheilostome bryozoan genera in the collection of the Swedish Museum of Natural History, pp. 157-181 in Zootaxa, 5125(2), 173-175, (2022-04-08) Biodiversity Taxonomy Animalia Bryozoa Gymnolaemata Cheilostomatida Gigantoporidae Stenopsella Stenopsella fenestrata info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5281/zenodo.642451610.11646/zootaxa.5125.2.410.5281/zenodo.642452810.5281/zenodo.6424515 2024-07-26T08:52:05Z Stenopsella fenestrata (Smitt, 1873) (Fig. 9; Table 7) Hippothoa fenestrata Smitt, 1873: 47, pl. 6, fig. 142. Stenopsella fenestrata : Bassler 1952: 385. Material examined. Holotype by monotypy SMNH-Type-1800, North Atlantic Ocean, S of Tortugas, United States, depth 31 m. Leg. Gulf Stream Explorations 1868–69. Description. Colony encrusting, multiserial, unilaminar (Fig. 9A). Autozooids distinct with deep interzooidal furrows, salient, quincuncially or irregularly arranged, hexagonal or rhomboidal, longer than wide (mean L/ W 1.44) Frontal shield convex, finely granular and crenulated in young zooids at colony growing edge (Fig. 9D) but developing spinose frontal processes in older generations of autozooids (Fig. 9C), evenly and densely perforated, up to four-fifth of its length corresponding to the attachment line of the peristome; pseudopores circular, minute, 8–10 µm in diameter; marginal areolae undistinguishable. Primary orifice subcircular with pointed triangular condyles separating a quadrangular anter from a shallow, bowl-shaped sinus (Fig. 9D), usually hidden by a tubular, imperforate peristome, directed upwards and frontally, forming a transversely elliptical secondary orifice, about 200 µm long by 300 µm wide (Fig. 9C, D); spiramen placed at the base of the peristome at the end of a short tube with a more or less flared rim, transversely elliptical or reniform, 170–215 x 75–95 µm, facing frontally or downwards (Fig. 9B, C). Avicularia single or paired, placed at the base of the peristome, drop-shaped with rounded, slightly raised rostrum directed distolaterally and inwards, and complete crossbar (Fig. 9D, E). Ovicells and ancestrula not observed. Remarks. Smitt (1873) placed this species in Hippothoa Lamouroux, 1821 acknowledging that the small encrusting colony (in agreement with the syntype illustrated here) available from Pourtales’ collection lacked the most essential character of the genus, i.e. the orificial sinus. However, the observation of such a sinus on an erect fragment of what he thought ... Other/Unknown Material North Atlantic Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Bryozoa Gymnolaemata Cheilostomatida Gigantoporidae Stenopsella Stenopsella fenestrata |
spellingShingle |
Biodiversity Taxonomy Animalia Bryozoa Gymnolaemata Cheilostomatida Gigantoporidae Stenopsella Stenopsella fenestrata Martino, Emanuela Di Stenopsella fenestrata |
topic_facet |
Biodiversity Taxonomy Animalia Bryozoa Gymnolaemata Cheilostomatida Gigantoporidae Stenopsella Stenopsella fenestrata |
description |
Stenopsella fenestrata (Smitt, 1873) (Fig. 9; Table 7) Hippothoa fenestrata Smitt, 1873: 47, pl. 6, fig. 142. Stenopsella fenestrata : Bassler 1952: 385. Material examined. Holotype by monotypy SMNH-Type-1800, North Atlantic Ocean, S of Tortugas, United States, depth 31 m. Leg. Gulf Stream Explorations 1868–69. Description. Colony encrusting, multiserial, unilaminar (Fig. 9A). Autozooids distinct with deep interzooidal furrows, salient, quincuncially or irregularly arranged, hexagonal or rhomboidal, longer than wide (mean L/ W 1.44) Frontal shield convex, finely granular and crenulated in young zooids at colony growing edge (Fig. 9D) but developing spinose frontal processes in older generations of autozooids (Fig. 9C), evenly and densely perforated, up to four-fifth of its length corresponding to the attachment line of the peristome; pseudopores circular, minute, 8–10 µm in diameter; marginal areolae undistinguishable. Primary orifice subcircular with pointed triangular condyles separating a quadrangular anter from a shallow, bowl-shaped sinus (Fig. 9D), usually hidden by a tubular, imperforate peristome, directed upwards and frontally, forming a transversely elliptical secondary orifice, about 200 µm long by 300 µm wide (Fig. 9C, D); spiramen placed at the base of the peristome at the end of a short tube with a more or less flared rim, transversely elliptical or reniform, 170–215 x 75–95 µm, facing frontally or downwards (Fig. 9B, C). Avicularia single or paired, placed at the base of the peristome, drop-shaped with rounded, slightly raised rostrum directed distolaterally and inwards, and complete crossbar (Fig. 9D, E). Ovicells and ancestrula not observed. Remarks. Smitt (1873) placed this species in Hippothoa Lamouroux, 1821 acknowledging that the small encrusting colony (in agreement with the syntype illustrated here) available from Pourtales’ collection lacked the most essential character of the genus, i.e. the orificial sinus. However, the observation of such a sinus on an erect fragment of what he thought ... |
format |
Other/Unknown Material |
author |
Martino, Emanuela Di |
author_facet |
Martino, Emanuela Di |
author_sort |
Martino, Emanuela Di |
title |
Stenopsella fenestrata |
title_short |
Stenopsella fenestrata |
title_full |
Stenopsella fenestrata |
title_fullStr |
Stenopsella fenestrata |
title_full_unstemmed |
Stenopsella fenestrata |
title_sort |
stenopsella fenestrata |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5281/zenodo.6424516 http://treatment.plazi.org/id/038254222A2744528A9FF8802C33FC6A |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Revision of the type species of some cheilostome bryozoan genera in the collection of the Swedish Museum of Natural History, pp. 157-181 in Zootaxa, 5125(2), 173-175, (2022-04-08) |
op_relation |
https://doi.org/10.11646/zootaxa.5125.2.4 http://zenodo.org/record/6424502 http://publication.plazi.org/id/FFBB2C5A2A3744408A08FFB82F56FFA3 https://sibils.text-analytics.ch/search/collections/plazi/038254222A2744528A9FF8802C33FC6A https://www.gbif.org/species/194520095 https://www.checklistbank.org/dataset/55213/taxon/038254222A2744528A9FF8802C33FC6A.taxon https://doi.org/10.5281/zenodo.6424528 http://zoobank.org/6DDA279A-FA5F-4993-98DD-FC40133292BB https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.6424515 https://doi.org/10.5281/zenodo.6424516 oai:zenodo.org:6424516 http://treatment.plazi.org/id/038254222A2744528A9FF8802C33FC6A |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.642451610.11646/zootaxa.5125.2.410.5281/zenodo.642452810.5281/zenodo.6424515 |
_version_ |
1810464478207148032 |