Melanella sp. 1 Bowdich 1822
Melanella sp. 1 (Figure 17 A–G) Material examined. Brazil: Off Pernambuco, REVIZEE Nordeste (08°46′00″S 34°44′00″O, 690 m), coll. RV Natureza , 18/xi/2000: MNRJ 35251 † [1 dd]. Description. Shell subcylindrical, straight, reaching about 3.6 mm long, 1.0 mm wide. Larval shell vitreous, cylindrical, w...
Main Authors: | , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Zenodo
2021
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5281/zenodo.4557507 https://zenodo.org/record/4557507 |
id |
ftdatacite:10.5281/zenodo.4557507 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Caenogastropoda Eulimidae Melanella Melanella sp. 1 |
spellingShingle |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Caenogastropoda Eulimidae Melanella Melanella sp. 1 Souza, Leonardo Santos De Pimenta, Alexandre Dias Barros, José Carlos Nascimento De Melanella sp. 1 Bowdich 1822 |
topic_facet |
Biodiversity Taxonomy Animalia Mollusca Gastropoda Caenogastropoda Eulimidae Melanella Melanella sp. 1 |
description |
Melanella sp. 1 (Figure 17 A–G) Material examined. Brazil: Off Pernambuco, REVIZEE Nordeste (08°46′00″S 34°44′00″O, 690 m), coll. RV Natureza , 18/xi/2000: MNRJ 35251 † [1 dd]. Description. Shell subcylindrical, straight, reaching about 3.6 mm long, 1.0 mm wide. Larval shell vitreous, cylindrical, with about 2.0 whorls, 370 µm wide; smooth, except for microscopic striations close to suture, transition to teleoconch marked by an almost indistinct incremental scar. Teleoconch with about 7.0 whorls, flat outline; suture almost indistinct, sloping; subsutural zone about 20% of the whorl height; surface polished, sculptured by straight axial lines spaced every 10–15 μm (Figure 17D); incremental scars slightly demarcated, appearing at irregu-lar intervals. Last whorl about 40% of the shell length; base rounded. Aperture short, pear shaped, acute posteriorly and rounded anteriorly; outer lip thin, opisthocline, sinuous, slightly retracting near the suture and after projecting, maximum projection in the lowermost third of the height, retracted in distal region; inner lip sinuous, sloping, reflected, well demarcated. Not umbilicate. Shell colourless. Measurements. MNRJ 35251†, 9 whorls, SL= 3.6 mm; BWL= 1.4 mm; AL= 0.9 mm; SW= 1.0 mm; AW= 0.5 mm. Remarks. The species that most resembles Melanella sp. 1 (Figure 17 A–G) is Melanella jeffreysi (Tryon, 1886) (Figure 17 H–J), with the subcylindrical shape, dome shaped apex, similar outline of the outer lip and similar dimensions of the protoconch (~ 370–380 µm wide) and teleoconch. According to Jeffreys (1884), the shell surface of M. jeffreysi (as “ Eulima solida ”) is covered by longitudinal, extremely thin axial lines, but Bouchet & Warén (1986) disagree with Jeffrey’s description. The latter authors commented that there are “only a few scattered, indistinct, very thin axial lines”, and that Jeffrey’s description is possibly related to a specimen collected in the PORCUPINE 1869 Expedition stn. 23. Bouchet & Warén (1986) identified the latter specimen as M. orphanensis despite uncertainties. We examined the lectotype of E. solida (USNM 133126) under SEM and verified that the teleoconch surface is almost entirely smooth, marked only by strong incremental scars (Figure 17J). Melanella sp. 1 has thin axial lines, distributed over the whole teleoconch in extremely small intervals (Figure 17D). Melanella sp. 1 differs from M. orphanensis (Figure 17K) by the straight spire, with shallower sutures and a slower increasing diameter. Despite the differences mentioned above, we refrain to describe Melanella sp. 1 as new because there are several Melanella s.l. with a subcylindrical shape currently known or awaiting description (Bouchet & Warén 1986; Personal observation). We prefer to wait for new material to become available. Geographical distribution. Brazil: Pernambuco. Bathymetric distribution. 690 m. : Published as part of Souza, Leonardo Santos De, Pimenta, Alexandre Dias & Barros, José Carlos Nascimento De, 2021, Revision of the deep-sea Eulimidae (Gastropoda, Caenogastropoda) from off Northeast Brazil, pp. 451-504 in Zootaxa 4927 (4) on page 482, DOI: 10.11646/zootaxa.4927.4.1, http://zenodo.org/record/4542923 : {"references": ["Tryon, G. W. (1886) Manual of Conchology. Vol. 8. Philadelphia, Pennsylvania, 461 pp., 79 pls.", "Jeffreys, J. G. (1884) On the Mollusca procured during the ' Lightning' and ' Porcupine' expeditions, 1868 - 70. Part VII. Proceedings of the Zoological Society of London, 52 (3), 341 - 372. https: // doi. org / 10.1111 / j. 1096 - 3642.1884. tb 02837. x", "Bouchet, P. & Waren, A. (1986) Revision of the northeast Atlantic bathyal and abyssal Aclididae, Eulimidae, Epitoniidae (Mollusca, Gastropoda). Bollettino Malacologico, Supplemento 2, 299 - 576. https: // doi. org / 10.5962 / bhl. title. 140762"]} |
format |
Text |
author |
Souza, Leonardo Santos De Pimenta, Alexandre Dias Barros, José Carlos Nascimento De |
author_facet |
Souza, Leonardo Santos De Pimenta, Alexandre Dias Barros, José Carlos Nascimento De |
author_sort |
Souza, Leonardo Santos De |
title |
Melanella sp. 1 Bowdich 1822 |
title_short |
Melanella sp. 1 Bowdich 1822 |
title_full |
Melanella sp. 1 Bowdich 1822 |
title_fullStr |
Melanella sp. 1 Bowdich 1822 |
title_full_unstemmed |
Melanella sp. 1 Bowdich 1822 |
title_sort |
melanella sp. 1 bowdich 1822 |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://dx.doi.org/10.5281/zenodo.4557507 https://zenodo.org/record/4557507 |
long_lat |
ENVELOPE(-62.167,-62.167,-64.717,-64.717) ENVELOPE(-66.867,-66.867,-68.167,-68.167) |
geographic |
Barros Nordeste |
geographic_facet |
Barros Nordeste |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
http://zenodo.org/record/4542923 http://publication.plazi.org/id/FFDFFFDAFFBEFFDEFFC88420FF8F4468 http://zoobank.org/AED51D9E-1751-4010-A8E1-B72AE428821A https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4927.4.1 http://zenodo.org/record/4542923 http://publication.plazi.org/id/FFDFFFDAFFBEFFDEFFC88420FF8F4468 https://dx.doi.org/10.5281/zenodo.4542971 http://zoobank.org/AED51D9E-1751-4010-A8E1-B72AE428821A https://dx.doi.org/10.5281/zenodo.4557506 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.4557507 https://doi.org/10.11646/zootaxa.4927.4.1 https://doi.org/10.5281/zenodo.4542971 https://doi.org/10.5281/zenodo.4557506 |
_version_ |
1766143563757780992 |
spelling |
ftdatacite:10.5281/zenodo.4557507 2023-05-15T17:41:48+02:00 Melanella sp. 1 Bowdich 1822 Souza, Leonardo Santos De Pimenta, Alexandre Dias Barros, José Carlos Nascimento De 2021 https://dx.doi.org/10.5281/zenodo.4557507 https://zenodo.org/record/4557507 unknown Zenodo http://zenodo.org/record/4542923 http://publication.plazi.org/id/FFDFFFDAFFBEFFDEFFC88420FF8F4468 http://zoobank.org/AED51D9E-1751-4010-A8E1-B72AE428821A https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4927.4.1 http://zenodo.org/record/4542923 http://publication.plazi.org/id/FFDFFFDAFFBEFFDEFFC88420FF8F4468 https://dx.doi.org/10.5281/zenodo.4542971 http://zoobank.org/AED51D9E-1751-4010-A8E1-B72AE428821A https://dx.doi.org/10.5281/zenodo.4557506 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Mollusca Gastropoda Caenogastropoda Eulimidae Melanella Melanella sp. 1 Text Taxonomic treatment article-journal ScholarlyArticle 2021 ftdatacite https://doi.org/10.5281/zenodo.4557507 https://doi.org/10.11646/zootaxa.4927.4.1 https://doi.org/10.5281/zenodo.4542971 https://doi.org/10.5281/zenodo.4557506 2021-11-05T12:55:41Z Melanella sp. 1 (Figure 17 A–G) Material examined. Brazil: Off Pernambuco, REVIZEE Nordeste (08°46′00″S 34°44′00″O, 690 m), coll. RV Natureza , 18/xi/2000: MNRJ 35251 † [1 dd]. Description. Shell subcylindrical, straight, reaching about 3.6 mm long, 1.0 mm wide. Larval shell vitreous, cylindrical, with about 2.0 whorls, 370 µm wide; smooth, except for microscopic striations close to suture, transition to teleoconch marked by an almost indistinct incremental scar. Teleoconch with about 7.0 whorls, flat outline; suture almost indistinct, sloping; subsutural zone about 20% of the whorl height; surface polished, sculptured by straight axial lines spaced every 10–15 μm (Figure 17D); incremental scars slightly demarcated, appearing at irregu-lar intervals. Last whorl about 40% of the shell length; base rounded. Aperture short, pear shaped, acute posteriorly and rounded anteriorly; outer lip thin, opisthocline, sinuous, slightly retracting near the suture and after projecting, maximum projection in the lowermost third of the height, retracted in distal region; inner lip sinuous, sloping, reflected, well demarcated. Not umbilicate. Shell colourless. Measurements. MNRJ 35251†, 9 whorls, SL= 3.6 mm; BWL= 1.4 mm; AL= 0.9 mm; SW= 1.0 mm; AW= 0.5 mm. Remarks. The species that most resembles Melanella sp. 1 (Figure 17 A–G) is Melanella jeffreysi (Tryon, 1886) (Figure 17 H–J), with the subcylindrical shape, dome shaped apex, similar outline of the outer lip and similar dimensions of the protoconch (~ 370–380 µm wide) and teleoconch. According to Jeffreys (1884), the shell surface of M. jeffreysi (as “ Eulima solida ”) is covered by longitudinal, extremely thin axial lines, but Bouchet & Warén (1986) disagree with Jeffrey’s description. The latter authors commented that there are “only a few scattered, indistinct, very thin axial lines”, and that Jeffrey’s description is possibly related to a specimen collected in the PORCUPINE 1869 Expedition stn. 23. Bouchet & Warén (1986) identified the latter specimen as M. orphanensis despite uncertainties. We examined the lectotype of E. solida (USNM 133126) under SEM and verified that the teleoconch surface is almost entirely smooth, marked only by strong incremental scars (Figure 17J). Melanella sp. 1 has thin axial lines, distributed over the whole teleoconch in extremely small intervals (Figure 17D). Melanella sp. 1 differs from M. orphanensis (Figure 17K) by the straight spire, with shallower sutures and a slower increasing diameter. Despite the differences mentioned above, we refrain to describe Melanella sp. 1 as new because there are several Melanella s.l. with a subcylindrical shape currently known or awaiting description (Bouchet & Warén 1986; Personal observation). We prefer to wait for new material to become available. Geographical distribution. Brazil: Pernambuco. Bathymetric distribution. 690 m. : Published as part of Souza, Leonardo Santos De, Pimenta, Alexandre Dias & Barros, José Carlos Nascimento De, 2021, Revision of the deep-sea Eulimidae (Gastropoda, Caenogastropoda) from off Northeast Brazil, pp. 451-504 in Zootaxa 4927 (4) on page 482, DOI: 10.11646/zootaxa.4927.4.1, http://zenodo.org/record/4542923 : {"references": ["Tryon, G. W. (1886) Manual of Conchology. Vol. 8. Philadelphia, Pennsylvania, 461 pp., 79 pls.", "Jeffreys, J. G. (1884) On the Mollusca procured during the ' Lightning' and ' Porcupine' expeditions, 1868 - 70. Part VII. Proceedings of the Zoological Society of London, 52 (3), 341 - 372. https: // doi. org / 10.1111 / j. 1096 - 3642.1884. tb 02837. x", "Bouchet, P. & Waren, A. (1986) Revision of the northeast Atlantic bathyal and abyssal Aclididae, Eulimidae, Epitoniidae (Mollusca, Gastropoda). Bollettino Malacologico, Supplemento 2, 299 - 576. https: // doi. org / 10.5962 / bhl. title. 140762"]} Text Northeast Atlantic DataCite Metadata Store (German National Library of Science and Technology) Barros ENVELOPE(-62.167,-62.167,-64.717,-64.717) Nordeste ENVELOPE(-66.867,-66.867,-68.167,-68.167) |