Difference between revisions of "Travisia"

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{{Publication to wiki notice
 
{{Publication to wiki notice
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  | author = Wiklund, Helena AND Neal, Lenka AND Glover, Adrian G. AND Drennan, Regan AND Muriel Rabone, AND Dahlgren, Thomas G.
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  | author = Gunton, Laetitia M. AND Kupriyanova, Elena K. AND Alvestad, Tom AND Avery, Lynda AND Blake, James A. AND Biriukova, Olga AND Böggemann, Markus AND Borisova, Polina AND Budaeva, Nataliya AND Burghardt, Ingo AND Capa, Maria AND Georgieva, Magdalena N. AND Glasby, Christopher J. AND Hsueh, Pan-Wen AND Hutchings, Pat AND Jimi, Naoto AND Kongsrud, Jon A. AND Langeneck, Joachim AND Meißner, Karin AND Murray, Anna AND Nikolic, Mark AND Paxton, Hannelore AND Ramos, Dino AND Schulze, Anja AND Sobczyk, Robert AND Watson, Charlotte AND Wiklund, Helena AND Wilson, Robin S. AND Zhadan, Anna AND Zhang, Jinghuai
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  | author_abbreviated = Wiklund H AND Neal L AND Glover A AND Drennan R AND Muriel Rabone AND Dahlgren T
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  | author_abbreviated = Gunton L AND Kupriyanova E AND Alvestad T AND Avery L AND Blake J AND Biriukova O AND Böggemann M AND Borisova P AND Budaeva N AND Burghardt I AND Capa M AND Georgieva M AND Glasby C AND Hsueh P AND Hutchings P AND Jimi N AND Kongsrud J AND Langeneck J AND Meißner K AND Murray A AND Nikolic M AND Paxton H AND Ramos D AND Schulze A AND Sobczyk R AND Watson C AND Wiklund H AND Wilson R AND Zhadan A AND Zhang J
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  | year = 2019
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  | year = 2021
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  | title = Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae
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  | title = Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage
 
  | journal = ZooKeys
 
  | journal = ZooKeys
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  | volume = 883
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  | volume = 1020
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  | pages = 1--82
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  | pages = 1--198
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  | doi = 10.3897/zookeys.883.36193
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  | doi = 10.3897/zookeys.1020.57921
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  | citationurl = https://zookeys.pensoft.net/articles.php?id=36193&element_type=9  
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  | citationurl = https://zookeys.pensoft.net/articles.php?id=57921&element_type=9  
−
  | url = https://zookeys.pensoft.net/articles.php?id=36193
+
  | url = https://zookeys.pensoft.net/articles.php?id=57921
 
  | publisher = Pensoft Publishers
 
  | publisher = Pensoft Publishers
 
  | publisherurl = http://www.pensoft.net/
 
  | publisherurl = http://www.pensoft.net/
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{{Treatment start
 
{{Treatment start
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  | Ordo = Capitellida
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  | Ordo = Phyllodocida
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  | Familia = Capitellidae
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  | Familia = Travisiidae
 
  | Genus = Travisia
 
  | Genus = Travisia
 
  | Specific name =  
 
  | Specific name =  
 
  | Infraspecific name =  
 
  | Infraspecific name =  
 
  | Taxon rank =
 
  | Taxon rank =
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  | Taxon authority = Johnston, 1840
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  | Taxon authority = sp. 1
 
  | Taxon status =  
 
  | Taxon status =  
 
  | Wikispecies page name = Travisia
 
  | Wikispecies page name = Travisia
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}}
 
}}
  
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==Notes==
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==Diagnosis==
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These distinctive, grub-like polychaetes with rugose epidermis were first described by Johnston (1840)<ref name="B50">{{aut|Johnston G}} (1840) Miscellanea Zoologica. British Annelids.Annals and Magazine for Natural History London1(4): 368–375. https://doi.org/10.1080/00222934009512507</ref > with the discovery of ''{{Taxon name|Travisia forbesii}}'' Johnston, 1840. Later, Kinberg (1866) established the genus ''{{Taxon name|Dindymenes}}'' and Chamberlin (1919)<ref name="B16">{{aut|Chamberlin R}} (1919) The {{Taxon name|Annelida}}{{Taxon name|Polychaeta}}.Memories of the Museum of Comparative Zoology at Harvard College48: 1–514.</ref > established the genus ''{{Taxon name|Kesun}}'', which he differentiated from ''{{Taxon name|Travisia}}'' by the complete absence of branchiae. Following a cladistic analysis of morphological characters, Dauvin and Bellan (1994)<ref name="B19">{{aut|Dauvin J}}, {{aut|Bellan G}} (1994) Systematics, ecology and biogeographical relationships in the sub-family {{Taxon name|Travisiinae}} ({{Taxon name|Polychaeta}}, {{Taxon name|Opheliidae}}).Mémoires du Muséum national d'histoire naturelle162: 169–184.</ref > synonymized ''{{Taxon name|Kesun}}'' and ''{{Taxon name|Dindymenides}}'' with ''{{Taxon name|Travisia}}'' and recognized at least 27 species. Important species-level characters include the presence of lobes, the position and relative size of the nephridiopores, and the total number of chaetigers, which appears to be stable in most, but not all, species (Dauvin and Bellan 1994<ref name="B19">{{aut|Dauvin J}}, {{aut|Bellan G}} (1994) Systematics, ecology and biogeographical relationships in the sub-family {{Taxon name|Travisiinae}} ({{Taxon name|Polychaeta}}, {{Taxon name|Opheliidae}}).Mémoires du Muséum national d'histoire naturelle162: 169–184.</ref >).<br />
+
Body of 22–25 chaetigers. Prostomium conical, longer than maximum width. Chaetae present from segment 2, one achaetous posterior segment (smallest specimens with chaetae only visible on anterior segments 2–5). Mouth located between chaetigers 1 and 2. Segment 1 uniannulate; anterior and posterior segments, starting at segment 2 triannulate (no obvious differentiation between anterior and posterior regions). Branchiae present, first on chaetiger 3–6, continue for 8–11 chaetigers. Branchiae much shorter than body diameter. Branchiae absent on specimens less than ~ 9.5 mm long, but present on an increasing number of segments on the largest specimens collected. Epidermal papillae are low and sparse at the anterior margin of each segment, becoming larger towards the posterior margin of each segment. Notopodial and neuropodial lobes commencing on chaetiger 3 (in small specimens either absent or difficult to distinguish from adjacent epidermal papillae). Parapodial lobes continuous with an encircling row of papillae, remaining epidermis of each segment low tessellation. Interramal pores first present chaetiger 1, last on chaetiger 20. Pre-pygidial 8–12 segments forming deep lateral grooves within which parapodia and chaetae located (only on the largest specimens). Pygidial tube with six or seven blunt lobes equal in length to the last two chaetigers. The last six dorsal posterior chaetigers crenulated.
−
The higher taxonomic position of ''{{Taxon name|Travisia}}'' has been in dispute for some time. While usually placed in {{Taxon name|Opheliidae}}, its relationship with {{Taxon name|Scalibregmatidae}} has also been long suggested (Ashworth 1902<ref name="B2">{{aut|Ashworth J}} (1902) The anatomy of ''{{Taxon name|Scalibregma inflatum}}'' Rathke.Quarterly Journal of Microscopical Science, London45: 237–309.</ref >), mainly due to possession of rugose epidermis. Hartmann-Schröder (1971)<ref name="B45">{{aut|Hartmann-Schröder G}} (1971) {{Taxon name|Annelida}}, borstenwurmer, {{Taxon name|polychaeta}}.Die Tierwelt Deutschlands und der angrenzenden Meeresteile nach ihren Merkmalen und nach ihrer Lebensweise58: 1–594. https://doi.org/10.1086/407180</ref > created a subfamily, {{Taxon name|Travisiinae}}, in {{Taxon name|Opheliidae}} to accommodate ''{{Taxon name|Travisia}}''. More recently, phylogenetic analyses were employed to answer this question. Persson and Pleijel (2005)<ref name="B77">{{aut|Persson J}}, {{aut|Pleijel F}} (2005) On the phylogenetic relationships of ''{{Taxon name|Axiokebuita}}'', ''{{Taxon name|Travisia}}'' and ''{{Taxon name|Scalibregmatidae}}'' ({{Taxon name|Polychaeta}}).Zootaxa998: 1–14. https://doi.org/10.11646/zootaxa.998.1.1</ref > used molecular data to recover ''{{Taxon name|Travisia}}'' nested within the {{Taxon name|Scalibregmatidae}}, and molecular analysis of Paul et al. (2010)<ref name="B71">{{aut|Paul C}}, {{aut|Halanych K}}, {{aut|Tiedemann R}}, {{aut|Bleidorn C}} (2010) Molecules reject an opheliid affinity for {{Taxon name|Travisia}} ({{Taxon name|Annelida}}).Systematics and Biodiversity8(4): 507–512. https://doi.org/10.1080/14772000.2010.517810</ref > rejected affinity with {{Taxon name|Opheliidae}} and found strong support sister-group relationship of ''{{Taxon name|Travisia}}'' and {{Taxon name|Scalibregmatidae}}. Law et al. (2014)<ref name="B56">{{aut|Law C}}, {{aut|Dorgan K}}, {{aut|Rouse G}} (2014) Relating divergence in polychaete musculature to different burrowing behaviors: A study using {{Taxon name|Opheliidae}} ({{Taxon name|Annelida}}).Journal of Morphology42: 548–571. https://doi.org/10.1002/jmor.20237</ref > again placed ''{{Taxon name|Travisia}}'' within {{Taxon name|Scalibregmatidae}} using molecular data. However, Blake and Maciolek (2016)<ref name="B13">{{aut|Blake J}}, {{aut|Maciolek N}} (2016) {{Taxon name|Travisiidae}} Hartmann-Schröder, 1971, new family status. In: Purschke G, Böggemann M, Westheide W (Eds) Handbook of Zoology. De Gruyter, Berlin.</ref > proposed a new family, {{Taxon name|Travisiidae}}, to accommodate ''{{Taxon name|Travisia}}''.<br />
+
−
''{{Taxon name|Travisia}}'' species have predominantly deep-water distribution (Blake and Maciolek 2016<ref name="B13">{{aut|Blake J}}, {{aut|Maciolek N}} (2016) {{Taxon name|Travisiidae}} Hartmann-Schröder, 1971, new family status. In: Purschke G, Böggemann M, Westheide W (Eds) Handbook of Zoology. De Gruyter, Berlin.</ref >) and two species, one of them very abundant, were found in UKSR material.
+
  
−
==Taxon Treatment==
+
==Remarks==
−
*{{aut|Wiklund, H}}; {{aut|Neal, L}}; {{aut|Glover, A}}; {{aut|Drennan, R}}; {{aut|Muriel Rabone, }}; {{aut|Dahlgren, T}}; 2019: Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae [https://zookeys.pensoft.net/ ''ZooKeys'',] '''883''': 1-82. {{doi|10.3897/zookeys.883.36193}}
+
Initially the smallest specimens were treated as a distinct OTU (in these the chaetae are sparse, papillae are less distinct and branchiae and parapodial lappets are not observable) but it seems more likely that this represents size-related variation. Other than having branchiae, ''{{Taxon name|Travisia}}'' sp. 1 is strikingly similar to abranchiate species ''{{Taxon name|Travisia glandulosa}}'' McIntosh, 1879 (e.g., see Wiklund et al. 2019<ref name="B443">{{aut|Wiklund H}}, {{aut|Neal L}}, {{aut|Glover A}}, {{aut|Drennan R}}, {{aut|Rabone M}}, {{aut|Dahlgren T}} (2019) Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: {{Taxon name|Annelida}}: {{Taxon name|Capitellidae}}, {{Taxon name|Opheliidae}}, {{Taxon name|Scalibregmatidae}}, and {{Taxon name|Travisiidae}}.ZooKeys883: 1–82. https://doi.org/10.3897/zookeys.883.36193</ref >: fig. 31D) and ''{{Taxon name|Travisia gravieri}}'' McIntosh, 1908 (see Kirkegaard 1996<ref name="B237">{{aut|Kirkegaard J}} (1996) Bathyal and abyssal polychaetes (sedentary species I).Galathea Report17: 57–77.</ref >). As noted above, branchiae are reduced and difficult to observe, or apparently absent in several small specimens of ''{{Taxon name|Travisia}}'' sp. 1 but branchiae have never been reported in ''{{Taxon name|T. glandulosa}}'' or ''{{Taxon name|T. gravieri}}''. ''{{Taxon name|T. glandulosa}}'' appears to have a disjunct distribution at abyssal depths, with isolated groups of records at ~ 60°N and 60°S in the Atlantic, plus several isolated records in the Kermadec and Sunda Trenches. ''{{Taxon name|Travisia gravieri}}'' is also widely reported in the North Atlantic at abyssal and bathyal depths in addition to a single record off Angola in the South Atlantic; however, the Angola specimen was only 4×1.5 mm (Kirkegaard 1996<ref name="B237">{{aut|Kirkegaard J}} (1996) Bathyal and abyssal polychaetes (sedentary species I).Galathea Report17: 57–77.</ref >) and we were not able to observe branchiae in specimens of ''{{Taxon name|Travisia}}'' sp. 1 from this study of similar size. It seems that ''{{Taxon name|T. glandulosa}}'', ''{{Taxon name|T. gravieri}}'', and ''{{Taxon name|Travisia}}'' sp. 1 may belong to a single species or species complex but re-evaluation of these taxa is beyond the scope of this study.<br />
 +
Among species with branchiae, only four other species along with ''{{Taxon name|Travisia}}'' sp. 1 have branchiae commencing at chaetiger 3 (''{{Taxon name|Travisia carnea}}'' Verrill, 1873; ''{{Taxon name|Travisia filamentosa}}'' León-González, 1998; ''{{Taxon name|Travisia hobsonae}}'' Santos, 1977 and ''{{Taxon name|Travisia profundi}}'' Chamberlin, 1919) but none of these have all chaetigers triannulate. ''{{Taxon name|T. profundi}}'' is similar in having 12 chaetigers with branchiae (''{{Taxon name|Travisia}}'' sp. 1 has 8–11 chaetigers with branchiae), but in ''{{Taxon name|T. profundi}}'' there is a transition to biannulate and uniannulate posterior chaetigers, and ten or 11 anal lobes compared with six or seven in ''{{Taxon name|Travisia}}'' sp. 1. This species differs from the two ''{{Taxon name|Travisia}}'' OTUs reported from 141–375 m in the GAB (MacIntosh et al. 2018<ref name="B273">{{aut|MacIntosh H}}, {{aut|Althaus F}}, {{aut|Williams A}}, {{aut|Tanner J}}, {{aut|Alderslade P}}, {{aut|Ahyong S}}, {{aut|Bax N}}, {{aut|Criscione F}}, {{aut|Crowther A}}, {{aut|Farrelly C}}, {{aut|Finn J}}, {{aut|Goudie L}}, {{aut|Gowlett-Holmes K}}, {{aut|Hosie A}}, {{aut|Kupriyanova E}}, {{aut|Mah C}}, {{aut|McCallum A}}, {{aut|Merrin K}}, {{aut|Miskelly A}}, {{aut|Mitchell M}}, {{aut|Molodtsova T}}, {{aut|Murray A}}, {{aut|O’Hara T}}, {{aut|O’Loughlin P}}, {{aut|Paxton H}}, {{aut|Reid A}}, {{aut|Sorokin S}}, {{aut|Staples D}}, {{aut|Walker-Smith G}}, {{aut|Whitfield E}}, {{aut|Wilson R}} (2018) Invertebrate diversity in the deep Great Australian Bight (200–5000 m). Marine Biodiversity Records 11(1): e23. https://doi.org/10.1186/s41200-018-0158-x</ref >: additional file 2).
  
 +
==Records==
 +
6 specimens. Suppl. material 1: ops. 4, 16, 31, 54, 56 (AM).
  
 +
==Taxon Treatment==
 +
*{{aut|Gunton, L}}; {{aut|Kupriyanova, E}}; {{aut|Alvestad, T}}; {{aut|Avery, L}}; {{aut|Blake, J}}; {{aut|Biriukova, O}}; {{aut|Böggemann, M}}; {{aut|Borisova, P}}; {{aut|Budaeva, N}}; {{aut|Burghardt, I}}; {{aut|Capa, M}}; {{aut|Georgieva, M}}; {{aut|Glasby, C}}; {{aut|Hsueh, P}}; {{aut|Hutchings, P}}; {{aut|Jimi, N}}; {{aut|Kongsrud, J}}; {{aut|Langeneck, J}}; {{aut|Meißner, K}}; {{aut|Murray, A}}; {{aut|Nikolic, M}}; {{aut|Paxton, H}}; {{aut|Ramos, D}}; {{aut|Schulze, A}}; {{aut|Sobczyk, R}}; {{aut|Watson, C}}; {{aut|Wiklund, H}}; {{aut|Wilson, R}}; {{aut|Zhadan, A}}; {{aut|Zhang, J}}; 2021: Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage [https://zookeys.pensoft.net/ ''ZooKeys'',] '''1020''': 1-198. {{doi|10.3897/zookeys.1020.57921}}
 +
 +
==Images==
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{{Gallery | lines=5 | width=250
 +
|1= File:zookeys-1020-001-g032.jpg|2= '''Figure 32.''' {{Taxon name|Sternaspidae}}. {{Taxon name|Travisiidae}}'''A'''''{{Taxon name|Sternaspis}}'' sp., ventral view (op. 40) '''B'''''{{Taxon name|Sternaspis}}'' sp., dorsal view (op. 40) '''C'''{{Taxon name|Sternaspis cf. annenkovae}}, ventral view (op. 40) '''D'''{{Taxon name|Sternaspis cf. annenkovae}}, ventral view (op. 40) '''E'''''{{Taxon name|Travisia}}'' sp. 1 (AM W.52547). Scale bars: 1 mm ('''A, B'''); 3 mm ('''C, D'''); 5 mm ('''E''').
 +
}}
  
 
==Other References==
 
==Other References==
  
 
<references />
 
<references />

Revision as of 21:51, 24 February 2021

Notice: This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.

If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly.

This page should be cited as follows (rationale):
Gunton L, Kupriyanova E, Alvestad T, Avery L, Blake J, Biriukova O, Böggemann M, Borisova P, Budaeva N, Burghardt I, Capa M, Georgieva M, Glasby C, Hsueh P, Hutchings P, Jimi N, Kongsrud J, Langeneck J, Meißner K, Murray A, Nikolic M, Paxton H, Ramos D, Schulze A, Sobczyk R, Watson C, Wiklund H, Wilson R, Zhadan A, Zhang J (2021) Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage. ZooKeys 1020 : 1–198, doi. Versioned wiki page: 2021-02-24, version 189508, https://species-id.net/w/index.php?title=Travisia&oldid=189508 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Gunton2021ZooKeys1020,
author = {Gunton, Laetitia M. AND Kupriyanova, Elena K. AND Alvestad, Tom AND Avery, Lynda AND Blake, James A. AND Biriukova, Olga AND Böggemann, Markus AND Borisova, Polina AND Budaeva, Nataliya AND Burghardt, Ingo AND Capa, Maria AND Georgieva, Magdalena N. AND Glasby, Christopher J. AND Hsueh, Pan-Wen AND Hutchings, Pat AND Jimi, Naoto AND Kongsrud, Jon A. AND Langeneck, Joachim AND Meißner, Karin AND Murray, Anna AND Nikolic, Mark AND Paxton, Hannelore AND Ramos, Dino AND Schulze, Anja AND Sobczyk, Robert AND Watson, Charlotte AND Wiklund, Helena AND Wilson, Robin S. AND Zhadan, Anna AND Zhang, Jinghuai},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage},
year = {2021},
volume = {1020},
issue = {},
pages = {1--198},
doi = {10.3897/zookeys.1020.57921},
url = {https://zookeys.pensoft.net/articles.php?id=57921},
note = {Versioned wiki page: 2021-02-24, version 189508, https://species-id.net/w/index.php?title=Travisia&oldid=189508 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage
A1 - Gunton L
A1 - Kupriyanova E
A1 - Alvestad T
A1 - Avery L
A1 - Blake J
A1 - Biriukova O
A1 - Böggemann M
A1 - Borisova P
A1 - Budaeva N
A1 - Burghardt I
A1 - Capa M
A1 - Georgieva M
A1 - Glasby C
A1 - Hsueh P
A1 - Hutchings P
A1 - Jimi N
A1 - Kongsrud J
A1 - Langeneck J
A1 - Meißner K
A1 - Murray A
A1 - Nikolic M
A1 - Paxton H
A1 - Ramos D
A1 - Schulze A
A1 - Sobczyk R
A1 - Watson C
A1 - Wiklund H
A1 - Wilson R
A1 - Zhadan A
A1 - Zhang J
Y1 - 2021
JF - ZooKeys
JA -
VL - 1020
IS -
UR - http://dx.doi.org/10.3897/zookeys.1020.57921
SP - 1
EP - 198
PB - Pensoft Publishers
M1 - Versioned wiki page: 2021-02-24, version 189508, https://species-id.net/w/index.php?title=Travisia&oldid=189508 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.1020.57921

Wikipedia/ Citizendium:

<ref name="Gunton2021ZooKeys1020">{{Citation
| author = Gunton L, Kupriyanova E, Alvestad T, Avery L, Blake J, Biriukova O, Böggemann M, Borisova P, Budaeva N, Burghardt I, Capa M, Georgieva M, Glasby C, Hsueh P, Hutchings P, Jimi N, Kongsrud J, Langeneck J, Meißner K, Murray A, Nikolic M, Paxton H, Ramos D, Schulze A, Sobczyk R, Watson C, Wiklund H, Wilson R, Zhadan A, Zhang J
| title = Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage
| journal = ZooKeys
| year = 2021
| volume = 1020
| issue =
| pages = 1--198
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.1020.57921
| url = https://zookeys.pensoft.net/articles.php?id=57921
| pmc =
| accessdate = 2025-04-03

}} Versioned wiki page: 2021-02-24, version 189508, https://species-id.net/w/index.php?title=Travisia&oldid=189508 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Phyllodocida
Familia: Travisiidae

Name

Travisia sp. 1 – Wikispecies link – Pensoft Profile

Diagnosis

Body of 22–25 chaetigers. Prostomium conical, longer than maximum width. Chaetae present from segment 2, one achaetous posterior segment (smallest specimens with chaetae only visible on anterior segments 2–5). Mouth located between chaetigers 1 and 2. Segment 1 uniannulate; anterior and posterior segments, starting at segment 2 triannulate (no obvious differentiation between anterior and posterior regions). Branchiae present, first on chaetiger 3–6, continue for 8–11 chaetigers. Branchiae much shorter than body diameter. Branchiae absent on specimens less than ~ 9.5 mm long, but present on an increasing number of segments on the largest specimens collected. Epidermal papillae are low and sparse at the anterior margin of each segment, becoming larger towards the posterior margin of each segment. Notopodial and neuropodial lobes commencing on chaetiger 3 (in small specimens either absent or difficult to distinguish from adjacent epidermal papillae). Parapodial lobes continuous with an encircling row of papillae, remaining epidermis of each segment low tessellation. Interramal pores first present chaetiger 1, last on chaetiger 20. Pre-pygidial 8–12 segments forming deep lateral grooves within which parapodia and chaetae located (only on the largest specimens). Pygidial tube with six or seven blunt lobes equal in length to the last two chaetigers. The last six dorsal posterior chaetigers crenulated.

Remarks

Initially the smallest specimens were treated as a distinct OTU (in these the chaetae are sparse, papillae are less distinct and branchiae and parapodial lappets are not observable) but it seems more likely that this represents size-related variation. Other than having branchiae, Travisia sp. 1 is strikingly similar to abranchiate species Travisia glandulosa McIntosh, 1879 (e.g., see Wiklund et al. 2019[1]: fig. 31D) and Travisia gravieri McIntosh, 1908 (see Kirkegaard 1996[2]). As noted above, branchiae are reduced and difficult to observe, or apparently absent in several small specimens of Travisia sp. 1 but branchiae have never been reported in T. glandulosa or T. gravieri. T. glandulosa appears to have a disjunct distribution at abyssal depths, with isolated groups of records at ~ 60°N and 60°S in the Atlantic, plus several isolated records in the Kermadec and Sunda Trenches. Travisia gravieri is also widely reported in the North Atlantic at abyssal and bathyal depths in addition to a single record off Angola in the South Atlantic; however, the Angola specimen was only 4×1.5 mm (Kirkegaard 1996[2]) and we were not able to observe branchiae in specimens of Travisia sp. 1 from this study of similar size. It seems that T. glandulosa, T. gravieri, and Travisia sp. 1 may belong to a single species or species complex but re-evaluation of these taxa is beyond the scope of this study.
Among species with branchiae, only four other species along with Travisia sp. 1 have branchiae commencing at chaetiger 3 (Travisia carnea Verrill, 1873; Travisia filamentosa León-González, 1998; Travisia hobsonae Santos, 1977 and Travisia profundi Chamberlin, 1919) but none of these have all chaetigers triannulate. T. profundi is similar in having 12 chaetigers with branchiae (Travisia sp. 1 has 8–11 chaetigers with branchiae), but in T. profundi there is a transition to biannulate and uniannulate posterior chaetigers, and ten or 11 anal lobes compared with six or seven in Travisia sp. 1. This species differs from the two Travisia OTUs reported from 141–375 m in the GAB (MacIntosh et al. 2018[3]: additional file 2).

Records

6 specimens. Suppl. material 1: ops. 4, 16, 31, 54, 56 (AM).

Taxon Treatment

  • Gunton, L; Kupriyanova, E; Alvestad, T; Avery, L; Blake, J; Biriukova, O; Böggemann, M; Borisova, P; Budaeva, N; Burghardt, I; Capa, M; Georgieva, M; Glasby, C; Hsueh, P; Hutchings, P; Jimi, N; Kongsrud, J; Langeneck, J; Meißner, K; Murray, A; Nikolic, M; Paxton, H; Ramos, D; Schulze, A; Sobczyk, R; Watson, C; Wiklund, H; Wilson, R; Zhadan, A; Zhang, J; 2021: Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage ZooKeys, 1020: 1-198. doi

Images

Figure 32. Sternaspidae. TravisiidaeASternaspis sp., ventral view (op. 40) BSternaspis sp., dorsal view (op. 40) CSternaspis cf. annenkovae, ventral view (op. 40) DSternaspis cf. annenkovae, ventral view (op. 40) ETravisia sp. 1 (AM W.52547). Scale bars: 1 mm (A, B); 3 mm (C, D); 5 mm (E).
Figure 32. Sternaspidae. TravisiidaeASternaspis sp., ventral view (op. 40) BSternaspis sp., dorsal view (op. 40) CSternaspis cf. annenkovae, ventral view (op. 40) DSternaspis cf. annenkovae, ventral view (op. 40) ETravisia sp. 1 (AM W.52547). Scale bars: 1 mm (A, B); 3 mm (C, D); 5 mm (E). 

Other References

  1. ↑ Wiklund H, Neal L, Glover A, Drennan R, Rabone M, Dahlgren T (2019) Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae.ZooKeys883: 1–82. https://doi.org/10.3897/zookeys.883.36193
  2. ↑ 2.0 2.1 Kirkegaard J (1996) Bathyal and abyssal polychaetes (sedentary species I).Galathea Report17: 57–77.
  3. ↑ MacIntosh H, Althaus F, Williams A, Tanner J, Alderslade P, Ahyong S, Bax N, Criscione F, Crowther A, Farrelly C, Finn J, Goudie L, Gowlett-Holmes K, Hosie A, Kupriyanova E, Mah C, McCallum A, Merrin K, Miskelly A, Mitchell M, Molodtsova T, Murray A, O’Hara T, O’Loughlin P, Paxton H, Reid A, Sorokin S, Staples D, Walker-Smith G, Whitfield E, Wilson R (2018) Invertebrate diversity in the deep Great Australian Bight (200–5000 m). Marine Biodiversity Records 11(1): e23. https://doi.org/10.1186/s41200-018-0158-x
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