Filellum Hincks, 1868
publication ID |
https://doi.org/ 10.5281/zenodo.206783 |
publication LSID |
lsid:zoobank.org:pub:40E72DFB-36AA-4A5B-B269-E8D99B332FDB |
DOI |
https://doi.org/10.5281/zenodo.6190980 |
persistent identifier |
https://treatment.plazi.org/id/0389B761-B710-AD3C-FF2E-C4AA18DA35B1 |
treatment provided by |
Plazi |
scientific name |
Filellum Hincks, 1868 |
status |
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Genus Filellum Hincks, 1868 View in CoL
Capsularia: Gray 1848: 151 View in CoL (in part); Naumov 1960: 280; Naumov 1969: 303 [non Capsularia Cuvier, 1798: 665 View in CoL = Coryne Gaertner View in CoL , in Pallas, 1774; after Lamouroux et al. 1824: 224; Bedot 1901: 434, 437; Cornelius 1975: 378].
? Conchella Gray, 1848: 88 View in CoL [discussion in Cornelius & Calder 1986: 338; Cornelius 1995: 253; Calder 1991: 35].
Coppinia Hassall, 1848: 2223 [discussion in Cornelius & Calder 1986: 335–337; Calder 1991: 35].
Reticularia Thomson, 1853: 443 ; Ralph 1958: 311; Rees and Thursfield 1965: 85 –88 (in part) [preoccupied by a name for a brachiopod described by McCoy, in Griffith 1844; after Vervoort 1972: 50; Cornelius 1975: 378; Calder 1991: 35 – Stechow 1923: 144 considered Reticularia as a mollusk].
Halia Hincks, 1855: 128 [preoccupied by a name for a gastropod described by Risso 1826; after Stechow 1923: 144 (quoting Scudder 1882, Nomenclator Zoologicus: 152); Calder 1991: 35; Cornelius 1995: 253].
Thalia L. Agassiz, 1862: 355 View in CoL [incorrect subsequent spelling of Halia Hincks, 1855 , after Bedot 1910: 308].
Filellum Hincks, 1868: 214 View in CoL ; Nutting 1901: 179; 1905: 946; Stechow 1913b: 44; Stechow 1923: 137 (comparative table of lafoeid genera), 144–145; Naumov 1960: 280; Naumov 1969: 303; Vervoort 1972: 50; Cornelius 1975: 378; Millard 1975: 175; Cornelius and Calder 1986: 335 –339; Calder 1991: 35 –36; Cornelius 1995: 253; Hirohito 1995: 110; Peña Cantero et al. 1998: 298 –299; Vervoort and Watson 2003: 57.
Fillelum Billard, 1906: 166 View in CoL [incorrect subsequent spelling].
Grammaria: Vervoort 1946: 194 View in CoL (in part) cf. Hirohito 1995: 110 [not Grammaria Stimpson, 1854 View in CoL ].
Corystolona Watson, 2002: 333 View in CoL –334.
Type species. Campanularia serpens Hassall, 1848 , by monotypy in Hincks (1868: 214).
Description. Lafoeidae with young and adult colonies stolonal; hydrorhiza filiform, branched, creeping on substratum. Hydrorhizal stolons giving rise directly to hydrothecae. Hydrothecae tubular, sessile; basal portion adherent to substratum, usually parallel to hydrorhizal stolon; distal free portion directed upwards at varying degrees and extension. Hydranth long, one distal whorl of filiform tentacles; hypostome short, dome-shaped. Hydrothecal diaphragm, hydrothecal operculum, nematothecae and nematophores absent. Gonophores as fixed sporosacs, in gonothecae forming coppiniae. Gonothecae either closely set, with lateral walls juxtaposed each other, or weakly aggregated, gonothecae being isolated. Coppinia with or without defensive tubes (modified hydrothecae). Cnidome consisting basically of heterotrichous microbasic mastigophores and/or microbasic euryteles.
Distribution. Based on literature, some species of Filellum are distributed worldwide, usually epibiotic on other hydroids ( Cornelius & Calder 1986: 335; Cornelius 1995: 253).
Remarks. Several generic names were proposed prior to Filellum Hincks, 1868 , but they were dismissed either by ICZN decision or because they were preoccupied (ICZN 1999, art. 60). The nomenclatural history of the group may be found in Stechow (1923: 144–145), Vervoort (1972: 50), Cornelius (1975: 378), Cornelius and Calder (1986: 335–341), Calder (1991: 35–36), and Peña Cantero et al. (1998: 299). A summary of the nomenclatural issues is given below.
Conchella Gray, 1848 View in CoL and Coppinia Hassall, 1848 are two generic names used in specific combinations of taxa presently referred to the generic name Filellum View in CoL . The identification of the type species of Conchella View in CoL , Campanularia intertexta Couch, 1844 , whose type specimen is not existent (see Couch, 1844: 41–42), is doubtful. The species may refer to Filellum serpens ( Hassall, 1848) View in CoL , Lafoea dumosa ( Fleming, 1820) View in CoL , Orthopyxis integra ( Macgillivray, 1842) View in CoL , or even to all of them ( Cornelius & Calder 1986: 338). The last of these three was excluded as type of C. intertexa by designation as lectotype of an illustration by Couch of a specimen having coppiniae ( Cornelius 1982: 122). The generic name Conchella View in CoL was never used subsequently (see Cornelius & Calder 1986). Conversely, the generic name Coppinia Hassall, 1848 was based on a lafoeid reproductive structure that had been confused as a distinct taxon, presently known in the literature as “coppinia”. The type species of the genus, Coppinia mirabilis Hassall, 1848, was eventually found to be the widely known species Filellum serpens ( Hassall, 1848) View in CoL , as it is considered today. The generic name Coppinia, although rarely used during the 20th century, remained valid and threatened the more widely used name Filellum View in CoL ( Cornelius & Calder 1986: 335–336). A case was submitted to the ICZN requesting suppression, for the purposes of the Principle of Priority, of the obscure and infrequently used names Conchella Gray, 1848 View in CoL and Coppinia Hassall, 1848. In Opinion 1485 (ICZN 1988), both names were placed on the Official Index of Rejected and Invalid Generic Names in Zoology.
Campanularia serpens Hassall, 1848 was transferred to the genus Reticularia Thomson, 1853 by Totton (1930: 160–161), based on its hypothesized conspecificity with the type species of the genus, Reticularia immersa Thomson, 1853 . The generic name Reticularia has been used by a series of authors in combination with many specific names presently referred to Filellum View in CoL , such as Reticularia annulata Watson, 1973 ( Watson 1973: 164) ; Reticularia antarctica ( Hartlaub, 1904) ( Totton 1930: 160 –161; Briggs 1938: 26; Rees & Thursfield 1965: 85 –86; Watson 1973: 163 –164); Reticularia serpens ( Hassall, 1848) ( Hastings 1943: 394; Millard 1957: 203; Rees & Thursfield 1965: 87 –88); and Reticularia serrata ( Clarke, 1879) ( Ralph 1958: 312; Rees & Thursfield 1965: 86 –87). Hincks (1868) believed that the generic name Reticularia Thomson, 1853 was preoccupied by Reticularia Bulliard, 1791 , a name applied to a fungus, and founded Filellum View in CoL as a replacement for it. Bulliard’s usage of the name is excluded from, and does not become a homonym in, zoological nomenclature ( Vervoort 1972: 49; Calder 1991: 35; see ICZN 1999, art. 1.4). However, the name is preoccupied by Reticularia McCoy , in Griffith 1844, a fossil brachiopod. As the oldest available and valid synonym of Reticularia Thomson, 1853 , Filellum View in CoL becomes the name of the genus.
The genus name Halia Hincks, 1855 , and the binomen Halia praetenuis Hincks, 1855 , were applied to what was originally thought to have been a bryozoan. The species was transferred to Hydrozoa by Hincks (1856), who held Halia to be a congener of Reticularia Thomson, 1853 . In fact, the name Halia Hincks, 1855 is an invalid junior homonym of the gastropod genus Halia Risso, 1826 (see Calder 1991: 35). The generic name Thalia View in CoL , as used by L. Agassiz (1862: 355), is a misspelling of Halia ; as such it does not constitute a threat to Filellum View in CoL .
Within the family Lafoeidae View in CoL , Filellum View in CoL was previously considered to be related to Grammaria View in CoL , either as: (1) the subgenus of Grammaria (Filellum) View in CoL (e.g., Broch 1913, 1928a, 1928b, 1933; Leloup 1933; Berezina 1948); (2) the genus Filellum (Grammaria) View in CoL (e.g., Leloup 1935); or (3) directly as a junior synonym (e.g., Kramp 1913; Broch 1918; Mathisen 1928; Remane 1933; Leloup 1938, 1947; Vervoort 1942, 1946, 1959; da Cunha 1950; Arndt 1964; Fey 1970; Füller 1970; Castric-Fey 1973). Evidence against this relationship was given by Vervoort (1972: 50), and re-affirmed by Calder (1991: 35). Similarly, the genus Filellum View in CoL has also incorrectly been considered as including the subgenus Lafoea View in CoL , such as in the use of Filellum (Lafoea) adhaerens ( Stechow 1913b: 30) View in CoL .
Filellum View in CoL was considered a junior synonym of Capsularia Modeer, 1793 ( Cornelius 1975: 378) View in CoL . The generic name was used by Naumov (1960: 280; 1969: 303), probably following Gray (1848: 151, as in the binomen Capsularia serpens ). Capsularia Cuvier, 1798 View in CoL was considered a synonym of Coryne Gaertner View in CoL , in Pallas 1774 by Lamouroux et al. (1824: 220, 224), Bedot (1901: 437), Cornelius (1975: 378, who provided the historical account on the case), and Calder (1991: 35–36).
Although the genus Filellum View in CoL is herein described as lacking nematothecae and nematophores, Calder (1991: 35) described the genus with “nematothecae usually absent”. As far as we know, based on all specimens of Filellum View in CoL we have studied, there is no trace of nematothecae in the members of the genus.
As stated above, most authors have based their identifications and descriptions exclusively on characters of the trophosome. Nevertheless, the paramount taxonomical importance of the reproductive structures (coppiniae) is evident, as illustrated by F. disaggregatum View in CoL and F. serpens (see Peña Cantero et al. 1998), species with indistinguishable trophosome, but easily recognized by their coppinia. As already stated, this fact makes unreliable all previous identifications of species of Filellum View in CoL exclusively based on non-reproductive characters ( Peña Cantero et al. 1998: 297).
The following species were described as belonging to, or subsequently referred to, the genus Filellum View in CoL . Nevertheless, to our knowledge, only the species listed in bold belong to Filellum View in CoL . The remaining species belong to other genera of Lafoeidae View in CoL ( Grammaria View in CoL , Lafoea View in CoL ) or to other phyla.
Filellum adnatum ( Fraser, 1925) species inquirenda (from Lafoea adnata Fraser, 1925 View in CoL )
Filellum adhaerens ( Nutting, 1901) View in CoL (from Lafoea adhaerens Nutting, 1901 View in CoL )
Filellum annulatum ( Watson, 1973) View in CoL
Filellum antarcticum ( Hartlaub, 1904) View in CoL (from Lafoea antarctica Hartlaub, 1904 View in CoL )
Filellum bouvieri Jullien, 1880 species inquirenda (from Filellum Bouvieri Jullien, 1880 View in CoL )
Filellum conopeum Watson, 2003 View in CoL
Filellum contortum ( Nutting, 1905) View in CoL species inquirenda (from Lafoea contorta Nutting, 1905 View in CoL )
Filellum disaggregatum Peña Cantero et al., 1998 View in CoL
Filellum expansum Levinsen, 1893 = Folliculina gigantea ( Dons, 1910) (Ciliophora) , after Dons (1910) and Vannucci (1955)
Filellum gabriellae Vannucci, 1949 = Folliculina gigantea ( Dons, 1910) (Ciliophora) , after Vannucci (1955)
Filellum magnificum Peña Cantero et al., 2004b View in CoL
Filellum minimum García Corrales et al., 1979 = Folliculina gigantea ( Dons, 1910) (Ciliophora) , after Peña Cantero et al. 1998
Filellum nitidum Watson, 2005 View in CoL
Filellum parasiticum ( Antsulevich, 1987) View in CoL (from Lineolaria parasitica Antsulevich, 1987 )
Filellum plicatum ( Hartlaub, 1904) species inquirenda (from Lafoea plicata Hartlaub, 1904 )
Filellum serpens ( Hassall, 1848) View in CoL (from Campanularia serpens Hassall, 1848 )
Filellum serratum ( Clarke, 1879) View in CoL (from Lafoea serrata Clarke, 1879 View in CoL )
Filellum tubiforme Schydlowsky, 1902 View in CoL = Filellum serpens ( Hassall, 1848) View in CoL
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Filellum Hincks, 1868
Marques, Antonio C., Peña, Álvaro L., Miranda, Thaís P. & Migotto, Alvaro E. 2011 |
Corystolona
Watson 2002: 333 |
Campanularia serpens
Calder 1991: 35 |
Watson 1973: 164 |
Watson 1973: 163 |
Vervoort 1972: 49 |
Rees 1965: 85 |
Rees 1965: 87 |
Rees 1965: 86 |
Ralph 1958: 312 |
Millard 1957: 203 |
Hastings 1943: 394 |
Briggs 1938: 26 |
Totton 1930: 160 |
Grammaria:
Hirohito 1995: 110 |
Vervoort 1946: 194 |
Fillelum
Billard 1906: 166 |
Filellum
Vervoort 2003: 57 |
Pena 1998: 298 |
Cornelius 1995: 253 |
Hirohito 1995: 110 |
Calder 1991: 35 |
Cornelius 1986: 335 |
Cornelius 1975: 378 |
Millard 1975: 175 |
Vervoort 1972: 50 |
Naumov 1969: 303 |
Naumov 1960: 280 |
Stechow 1923: 137 |
Stechow 1913: 44 |
Nutting 1901: 179 |
Hincks 1868: 214 |
Thalia
Bedot 1910: 308 |
Agassiz 1862: 355 |
Halia
Cornelius 1995: 253 |
Calder 1991: 35 |
Stechow 1923: 144 |
Hincks 1855: 128 |
Reticularia
Calder 1991: 35 |
Cornelius 1975: 378 |
Vervoort 1972: 50 |
Rees 1965: 85 |
Ralph 1958: 311 |
Stechow 1923: 144 |
Thomson 1853: 443 |
Capsularia:
Cornelius 1975: 378 |
Naumov 1969: 303 |
Naumov 1960: 280 |
Bedot 1901: 434 |
Gray 1848: 151 |
Lamouroux 1824: 224 |
Cuvier 1798: 665 |
Conchella
Cornelius 1995: 253 |
Calder 1991: 35 |
Cornelius 1986: 338 |
Gray 1848: 88 |