Glaucostegus cemiculus (Geoffroy Saint-Hilaire, 1817)
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
The blackchin guitarfish (Glaucostegus cemiculus, formerly Rhinobatos cemiculus) is a species of cartilaginous fish in the family Rhinobatidae. It is native to the eastern Atlantic Ocean and the Mediterranean Sea. It is a bottom-dwelling fish feeding on crustaceans, other invertebrates and fish. The females give birth to live young. Its lifestyle makes it vulnerable to trawling and other fishing methods, populations seem to be declining and it is subject to intensive fishing pressure, with its fins being sold into the Asian market. The International Union for Conservation of Nature has assessed its conservation status as being "critically endangered".
Wikipedia contributors, Blackchin guitarfish; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:36:57.064110+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Glaucostegus cemiculus (Geoffroy Saint-Hilaire, 1817)
- Name authority
- (Geoffroy Saint-Hilaire, 1817)
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Elasmobranchii
- Order
- Rhinopristiformes
- Family
- Glaucostegidae
- Genus
- Glaucostegus
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: yes · Freshwater: no · Terrestrial: no. These do not form a complete habitat description.
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumChondrichthyes
- classElasmobranchii
- subclassNeoselachii
- infraclassBatoidea
- orderRhinopristiformes
- familyGlaucostegidae Last, Séret & Naylor, 2016
- genusGlaucostegus Bonaparte, 1846
- speciesGlaucostegus cemiculus (Geoffroy Saint-Hilaire, 1817)
Close classified relatives
These entries share the source’s genus, Glaucostegus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Granulated guitarfishGlaucostegus granulatus (Cuvier, 1829) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus halavi (Forsskål, 1775) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus younholeei Habib & Islam, 2001 | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus microphthalmus (Teng, 1959) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus obtusus (Müller & Henle, 1841) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus thouin (Anonymous [Lacepède], 1798) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
| Glaucostegus typus (Anonymous [Bennett], 1830) | GlaucostegidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Rhinobatos cemiculus Geoffroy Saint-Hilaire, 1817 Geoffroy Saint-Hilaire, 1817 | synonym |
| Rhinobatos congolensis Giltay, 1928 Giltay, 1928 | synonym |
| Rhinobatos rasus Garman, 1908 Garman, 1908 | synonym |
| Rhinobatus congolensis Giltay, 1928 Giltay, 1928 | synonym |
| Rhinobatus petiti Chabanaud, 1929 Chabanaud, 1929 | synonym |
| Rhinobatos cemiculus rasus Garman, 1908 Garman, 1908 | synonym |
| Glaucostegus petiti (Chabanaud, 1929) (Chabanaud, 1929) | synonym |
| Rhinobathos cemiculus Geoffroy Saint-Hilaire, 1817 Geoffroy Saint-Hilaire, 1817 | synonym |
| Rhinobatos petiti Chabanaud, 1929 Chabanaud, 1929 | synonym |
| Rhinobatus cemiculus Geoffroy Saint-Hilaire, 1817 Geoffroy Saint-Hilaire, 1817 | synonym |
| Rhinobatus rasus Garman, 1908 Garman, 1908 | synonym |
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.marinespecies.org/aphia.php?p=taxdetails&id=1016062 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:3G6MS. Classification follows source parent identifiers. English common names may vary by region.