Copepoda taxon details

Monstrilla scotti Isaac, 1975 in Grygier & Suárez-Morales, 2018

364457  (urn:lsid:marinespecies.org:taxname:364457)

accepted
Species
marine, brackish, fresh, terrestrial
Isaac, M.J. (1974). Studies on planktonic arthropods. Ph.D. Thesis, University College of Swansea, Wales, United Kingdom 146pp. [details]   
Taxonomic remark Strilloma scotti Isaac, sp. nov. The specific name has never been made available since its original proposal as a...  
Taxonomic remark Strilloma scotti Isaac, sp. nov. The specific name has never been made available since its original proposal as a disclaimed “nomen nudum” by Isaac (1975b) in the form “Strilloma scotti (T. Scott, 1904) sp. n.” Suárez-Morales & Gasca (2004) cited Isaac (1975b) and transferred this species to Monstrilla along with all other nominal species of Strilloma, as a “comb. nov.”, but in attributing scotti to both Isaac, 1975 (abstract and p. 292) and to Scott, 1904 (p. 297) instead of explicitly proposing it as new, they failed to meet the conditions of Article 16.1 of the Code for availability of the name. We do so herein by quoting, with authorization, from Isaac’s (1974b: 70–71) unpublished description of the species. We thereby validly publish this text in the sense of the Code while also allowing Isaac to retain sole authorship of this name under Article 50.1.1 of the Code. He wrote as follows (with originally underlined scientific names here rendered in italics):

‘In his 1904 paper, Scott describes a pair of monstrillids as Monstrilla grandis Giesbrecht. Neither of the sexes

500 · Zootaxa 4486 (4) © 2018 Magnolia Press

GRYGIER & SUÁREZ-MORALES are Giesbrecht’s species, so the name Strilloma scotti is here proposed instead. The female is 4 mm in length (S. grandis is 2.3–3.75 mm), and the fifth legs differ from those of S. grandis. There are three setae on the outer ramus, the innermost being much shorter than the other two. “The inner lobe appears to be furnished with only a single apical seta, but our dissection shows what appears to be the base of a seta on the inner margin of this lobe, the seta itself having probably been broken off”. There is also no indication in Scott’s drawing or description of the knoblike process which S. grandis bears on the outer ramus. Scott’s specimens have six furcal setae, as do Giesbrecht’s species, but in S. scotti, the sixth accessory seta on the dorsal surface is very much shorter than the other setae, whereas in Giesbrecht’s species, this sixth seta is only slightly shorter, though it is rather narrower than the others.

‘The male S. scotti has the same arrangement of furcal setae as the female, and differs from S. grandis in the shape of the cephalic segment. Its length is 2 mm, that of S. grandis being 1.7–1.9 mm.’

This text as transcribed herein is sufficient to make the specific name scotti available from the present work under Isaac’s authorship in that it provides a differential diagnosis with respect to Strilloma (currently Monstrilla) grandis, thus fulfilling Article 13.1.1 of the Code, and it accomplishes the fixation of Scott’s (1904) two specimens as syntypes, thus fulfilling Article 16.4.1 (the conditions for fixation of syntypes are more clearly explained in Articles 72.3 and 73.2.1.1). Article 16.4.2 concerning deposition of the syntypes in a collection only pertains to extant specimens, and while part of Scott’s (1904) material is extant in London, as was noted above (Natural History Museum, 2014), the mentioned specimens of supposed M. grandis were not among those accessioned in 1911 as part of the Norman Collection. Their whereabouts are unknown, and we presume them lost. While Isaac has proposed to classify this new species in the genus Strilloma, in current thinking it actually belongs to Monstrilla (see Suárez-Morales & Gasca 2004) and should be cited as Monstrilla scotti (Isaac in Grygier & SuárezMorales), with the present authors, not Suárez-Morales & Gasca, being responsible for the change in generic assignment. The type locality, i.e. the site of collection of the syntypes, was not specified in the text quoted above, but Scott (1904) noted that both specimens were from the head of Loch Fyne (Firth of Clyde), in western Scotland. [details]
Walter, T.C.; Boxshall, G. (2024). World of Copepods Database. Monstrilla scotti Isaac, 1975 in Grygier & Suárez-Morales, 2018. Accessed at: https://www.marinespecies.org/copepoda/aphia.php?p=taxdetails&id=364457 on 2024-03-19
Date
action
by
2008-08-04 10:38:45Z
created
2008-10-07 23:31:33Z
changed
2021-01-18 21:25:12Z
changed
2021-01-19 17:10:57Z
changed

original description Isaac, M.J. (1974). Studies on planktonic arthropods. Ph.D. Thesis, University College of Swansea, Wales, United Kingdom 146pp. [details]   

basis of record Walter, T. Chad. The World of Copepods. International online database. , available online at http://www.marinespecies.org/copepoda [details]   

additional source Isaac, M.J. (1975). Monstrilla intermedia Krichagin, 1877 (Copepoda: Monstrilloida): proposal for suppression. Z.N.(S.) 2098. <em>Bulletin of Zoological Nomenclature.</em> 32(3):171-172. (22-ix-1975). [details]  Available for editors  PDF available 

new combination reference Suárez-Morales, E. & R. Gasca. (2004). On the invalidity of Strilloma Isaac (Copepoda: Monstrilloida): observations from the type species. <em>In: Hwang, J.S., J.S. Ho & C.T. Shih, (eds). Proceedings of the 8th International Conference on Copepoda, Special Issue: Contemporary Studies on Copepoda, Zoological Studies.</em> 43(2):292-299. [details]  Available for editors  PDF available 

new combination reference Grygier, M.J. & E. Suárez-Morales. (2018). Recognition and partial solution of nomenclatural issues involving copepods of the family Monstrillidae (Crustacea: Copepoda: Monstrilloida). Zootaxa, 4486(4):497-509., available online at https://doi.org/10.11646/zootaxa.4486.4.5 [details]  Available for editors  PDF available 

ecology source Brun, P., M.R. Payne & T. Kiørboe. (2017). A trait database for marine copepods. <em>Earth System Science Data.</em> 9(1):99-113., available online at https://doi.org/10.5194/essd-9-99-2017 [details]  Available for editors  PDF available 
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
From editor or global species database
Taxonomic remark Strilloma scotti Isaac, sp. nov. The specific name has never been made available since its original proposal as a disclaimed “nomen nudum” by Isaac (1975b) in the form “Strilloma scotti (T. Scott, 1904) sp. n.” Suárez-Morales & Gasca (2004) cited Isaac (1975b) and transferred this species to Monstrilla along with all other nominal species of Strilloma, as a “comb. nov.”, but in attributing scotti to both Isaac, 1975 (abstract and p. 292) and to Scott, 1904 (p. 297) instead of explicitly proposing it as new, they failed to meet the conditions of Article 16.1 of the Code for availability of the name. We do so herein by quoting, with authorization, from Isaac’s (1974b: 70–71) unpublished description of the species. We thereby validly publish this text in the sense of the Code while also allowing Isaac to retain sole authorship of this name under Article 50.1.1 of the Code. He wrote as follows (with originally underlined scientific names here rendered in italics):

‘In his 1904 paper, Scott describes a pair of monstrillids as Monstrilla grandis Giesbrecht. Neither of the sexes

500 · Zootaxa 4486 (4) © 2018 Magnolia Press

GRYGIER & SUÁREZ-MORALES are Giesbrecht’s species, so the name Strilloma scotti is here proposed instead. The female is 4 mm in length (S. grandis is 2.3–3.75 mm), and the fifth legs differ from those of S. grandis. There are three setae on the outer ramus, the innermost being much shorter than the other two. “The inner lobe appears to be furnished with only a single apical seta, but our dissection shows what appears to be the base of a seta on the inner margin of this lobe, the seta itself having probably been broken off”. There is also no indication in Scott’s drawing or description of the knoblike process which S. grandis bears on the outer ramus. Scott’s specimens have six furcal setae, as do Giesbrecht’s species, but in S. scotti, the sixth accessory seta on the dorsal surface is very much shorter than the other setae, whereas in Giesbrecht’s species, this sixth seta is only slightly shorter, though it is rather narrower than the others.

‘The male S. scotti has the same arrangement of furcal setae as the female, and differs from S. grandis in the shape of the cephalic segment. Its length is 2 mm, that of S. grandis being 1.7–1.9 mm.’

This text as transcribed herein is sufficient to make the specific name scotti available from the present work under Isaac’s authorship in that it provides a differential diagnosis with respect to Strilloma (currently Monstrilla) grandis, thus fulfilling Article 13.1.1 of the Code, and it accomplishes the fixation of Scott’s (1904) two specimens as syntypes, thus fulfilling Article 16.4.1 (the conditions for fixation of syntypes are more clearly explained in Articles 72.3 and 73.2.1.1). Article 16.4.2 concerning deposition of the syntypes in a collection only pertains to extant specimens, and while part of Scott’s (1904) material is extant in London, as was noted above (Natural History Museum, 2014), the mentioned specimens of supposed M. grandis were not among those accessioned in 1911 as part of the Norman Collection. Their whereabouts are unknown, and we presume them lost. While Isaac has proposed to classify this new species in the genus Strilloma, in current thinking it actually belongs to Monstrilla (see Suárez-Morales & Gasca 2004) and should be cited as Monstrilla scotti (Isaac in Grygier & SuárezMorales), with the present authors, not Suárez-Morales & Gasca, being responsible for the change in generic assignment. The type locality, i.e. the site of collection of the syntypes, was not specified in the text quoted above, but Scott (1904) noted that both specimens were from the head of Loch Fyne (Firth of Clyde), in western Scotland. [details]