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{{Short description|Extinct species of bird}}
{{Italic title}}{{Taxobox
{{Italic title}}
{{Speciesbox
| name=''Regulus bulgaricus''
| name=''Regulus bulgaricus''
| extinct=yes
| regnum = [[Animal]]ia
⚫
| taxon = Regulus bulgaricus
| phylum = [[Chordate|Chordata]]
⚫
| authority=[[Zlatozar Boev|Boev]], 1999
| classis = [[Aves]]
| ordo = [[Passeriformes]]
| subordo = [[Passeri]]
| familia = [[Regulidae]]
| genus = ''[[Regulus (genus)|Regulus]]''
| species = [[extinction|†]]'''''R. bulgaricus'''''
⚫
| binomial= ''Regulus bulgaricus''
⚫
| binomial_authority=[[Zlatozar Boev|Boev]], 1999
}}
}}

'''''Regulus bulgaricus''''' is a fossil [[passerine]] from the Middle [[Villafranchian]] (upper [[Pliocene]] to lower [[Pleistocene]] ) of [[Bulgaria]]. This bird is a member of the [[kinglet]] family and genus, and is the only fossil kinglet found so far. It is known from a single [[ulna]], which is 13.3 mm long.<ref name="Boev111"/> The fossil was discovered in 1991 near [[Varshets, Bulgaria]], and described by [[Zlatozar Boev]].
'''''Regulus bulgaricus''''' is a fossil [[passerine]] from the Middle [[Villafranchian]] (upper [[Pliocene]] to lower [[Pleistocene]] ) of [[Bulgaria]]. This bird is a member of the [[kinglet]] family and genus, and is the only fossil kinglet found so far. It is known from a single [[ulna]], which is 13.3&nbsp;mm long.<ref name="Boev111"/> The fossil was discovered in 1991 near [[Varshets, Bulgaria]], and described by [[Zlatozar Boev]].


== Taxonomy ==
== Taxonomy ==


The only known specimen of ''Regulus bulgaricus'' is a complete left ulna, 13.3 mm in length. It was collected on 20 September 1991 in a [[ponor]] near Varshets, Bulgaria. It was first described by its collector, the Bulgarian paleornithologist Zlatozar Boev. Its species name, ''bulgaricus'', was given after the country in which the fossil was found.<ref name="Boev111">Boev (1999), p. 111</ref> Boev diagnosed it as an extinct species of the genus ''Regulus''. The ulna is smaller than that of most passerines, and the shape of the articular surfaces identify it as a kinglet. It is distinguished from ''[[Regulus regulus|R. regulus]]'' by a thicker base, a longer [[olecranon]], a larger [[upper extremity of ulna|cotyla dorsalis]], and smaller [[quill knob]]s (papillae remigales caudales). Compared to ''[[Regulus ignicapilla|R. ignicapilla]]'', ''R. bulgaricus'' has a narrower proximal part of the [[diaphysis]], a shorter olecranon, and smaller [[peroneus muscles|tuberculum retinaculi]]. Although Boev was unable to compare the fossil ulna with ''[[Regulus goodfellowi|R. goodfellowi]]'', it can be excluded from this taxonomical comparison due to it sharing a superspecies with ''R. regulus''.<ref>Boev (1999), p. 112</ref>
The only known specimen of ''Regulus bulgaricus'' is a complete left ulna, 13.3&nbsp;mm in length. It was collected on 20 September 1991 in a [[ponor]] near Varshets, Bulgaria. It was first described by its collector, the Bulgarian paleornithologist Zlatozar Boev. Its species name, ''bulgaricus'', was given after the country in which the fossil was found.<ref name="Boev111">Boev (1999), p. 111</ref> Boev diagnosed it as an extinct species of the genus ''Regulus''. The ulna is smaller than that of most passerines, and the shape of the articular surfaces identify it as a kinglet. It is distinguished from ''[[Regulus regulus|R. regulus]]'' by a thicker base, a longer [[olecranon]], a larger [[upper extremity of ulna|cotyla dorsalis]], and smaller [[quill knob]]s (papillae remigales caudales). Compared to ''[[Regulus ignicapilla|R. ignicapilla]]'', ''R. bulgaricus'' has a narrower proximal part of the [[diaphysis]], a shorter olecranon, and smaller [[peroneus muscles|tuberculum retinaculi]]. Although Boev was unable to compare the fossil ulna with ''[[Regulus goodfellowi|R. goodfellowi]]'', it can be excluded from this taxonomical comparison due to it sharing a superspecies with ''R. regulus''.<ref>Boev (1999), p. 112</ref>


''Regulus bulgaricus'' is the only fossil kinglet, and is possibly the ancestor of ''R. ignicapillus''. This was speculated based on the postglacial origin of a coniferous forest belt in the [[Holarctic]],<ref>Boev (2002), p. 38</ref> which means that its avifauna is of a more recent origin.<ref>Boev (1999), p. 113</ref>
''Regulus bulgaricus'' is the only fossil kinglet, and is possibly the ancestor of ''R. ignicapillus''. This was speculated based on the postglacial origin of a coniferous forest belt in the [[Holarctic]],<ref>Boev (2002), p. 38</ref> which means that its avifauna is of a more recent origin.<ref>Boev (1999), p. 113</ref>
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== Literature cited ==
== Literature cited ==


* {{cite journal |last1=Boev|first1=Zlatozar|year=1999|title=Regulas bulgaricus sp. n.-the first fossil Kinglet (Aves: Sylviidae) from the Late Pliocene of Varshets, Western Bulgaria|journal=Historia Naturalis Bulgarica|publisher=Bulgarian Academy of Sciences|volume=10|pages=109–115|url=https://archive.org/stream/historianaturali10bulg#page/109/|doi= }}
* {{cite journal |last1=Boev|first1=Zlatozar|year=1999|title=Regulas bulgaricus sp. n.-the first fossil Kinglet (Aves: Sylviidae) from the Late Pliocene of Varshets, Western Bulgaria|journal=Historia Naturalis Bulgarica|publisher=Bulgarian Academy of Sciences|volume=10|pages=109–115|url=https://archive.org/stream/historianaturali10bulg#page/109/}}
* {{cite journal |last1=Boev|first1=Zlatozar|year=2002|title=Neogene avifauna of Bulgaria|journal=Proceedings of the 5th Symposium of the Society of Avian Palaeontology and Evolution |publisher= Science Press, Beijing|pages=29–40|url=http://haltakov.com/8group/zb/sci/164_boev_2002_neogene_avifauna_bg_vp.pdf|doi= }}
* {{cite journal|last1=Boev|first1=Zlatozar|year=2002|title=Neogene avifauna of Bulgaria|journal=Proceedings of the 5th Symposium of the Society of Avian Palaeontology and Evolution|publisher=Science Press, Beijing|pages=29–40|url=http://haltakov.com/8group/zb/sci/164_boev_2002_neogene_avifauna_bg_vp.pdf}}{{dead link|date=April 2018 |bot=InternetArchiveBot |fix-attempted=yes }}

{{Taxonbar|from=Q7309717}}


[[Category:Regulus (genus)]]
[[Category:Regulus (bird)]]
[[Category:Fauna of Bulgaria]]
[[Category:Fossils of Bulgaria]]
[[Category:Fossil taxa described in 1999]]
[[Category:Fossil taxa described in 1999]]
[[Category:Extinct birds of Europe]]
[[Category:Extinct birds of Europe]]

Latest revision as of 02:32, 28 March 2024

Regulus bulgaricus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Regulidae
Genus: Regulus
Species:
†R. bulgaricus
Binomial name
†Regulus bulgaricus
Boev, 1999

Regulus bulgaricus is a fossil passerine from the Middle Villafranchian (upper Pliocene to lower Pleistocene ) of Bulgaria. This bird is a member of the kinglet family and genus, and is the only fossil kinglet found so far. It is known from a single ulna, which is 13.3 mm long.[1] The fossil was discovered in 1991 near Varshets, Bulgaria, and described by Zlatozar Boev.

Taxonomy

[edit]

The only known specimen of Regulus bulgaricus is a complete left ulna, 13.3 mm in length. It was collected on 20 September 1991 in a ponor near Varshets, Bulgaria. It was first described by its collector, the Bulgarian paleornithologist Zlatozar Boev. Its species name, bulgaricus, was given after the country in which the fossil was found.[1] Boev diagnosed it as an extinct species of the genus Regulus. The ulna is smaller than that of most passerines, and the shape of the articular surfaces identify it as a kinglet. It is distinguished from R. regulus by a thicker base, a longer olecranon, a larger cotyla dorsalis, and smaller quill knobs (papillae remigales caudales). Compared to R. ignicapilla, R. bulgaricus has a narrower proximal part of the diaphysis, a shorter olecranon, and smaller tuberculum retinaculi. Although Boev was unable to compare the fossil ulna with R. goodfellowi, it can be excluded from this taxonomical comparison due to it sharing a superspecies with R. regulus.[2]

Regulus bulgaricus is the only fossil kinglet, and is possibly the ancestor of R. ignicapillus. This was speculated based on the postglacial origin of a coniferous forest belt in the Holarctic,[3] which means that its avifauna is of a more recent origin.[4]

References

[edit]
  1. ^ a b Boev (1999), p. 111
  2. ^ Boev (1999), p. 112
  3. ^ Boev (2002), p. 38
  4. ^ Boev (1999), p. 113

Literature cited

[edit]
  • Boev, Zlatozar (1999). "Regulas bulgaricus sp. n.-the first fossil Kinglet (Aves: Sylviidae) from the Late Pliocene of Varshets, Western Bulgaria". Historia Naturalis Bulgarica. 10. Bulgarian Academy of Sciences: 109–115.
  • Boev, Zlatozar (2002). "Neogene avifauna of Bulgaria" (PDF). Proceedings of the 5th Symposium of the Society of Avian Palaeontology and Evolution. Science Press, Beijing: 29–40.[permanent dead link‍]
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