Holocephali
E389321
Holocephali is a subclass of cartilaginous fishes that includes the chimaeras, deep-sea relatives of sharks and rays characterized by a single gill opening and distinctive tooth plates.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Holocephali canonical | 2 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
clade
ⓘ
taxonomic subclass ⓘ |
| class | Chondrichthyes ⓘ |
| commonName | holocephalans ⓘ |
| diet |
crustaceans
ⓘ
echinoderms ⓘ hard_shelled_invertebrates ⓘ molluscs ⓘ |
| distinguishedFrom |
Elasmobranchii_by_fused_upper_jaw
ⓘ
Elasmobranchii_by_single_gill_opening ⓘ |
| eggType | leathery_egg_cases ⓘ |
| etymology | from_Greek_holos_entire_and_kephale_head ⓘ |
| extant | true ⓘ |
| feedingType | durophagous ⓘ |
| firstAppearance |
Devonian Period
ⓘ
surface form:
Devonian_period
|
| geologicTimeRange | Devonian_to_Recent ⓘ |
| hasCharacteristic |
cartilaginous_skeleton
ⓘ
four_internal_gill_pouches_covered_by_soft_tissue_operculum ⓘ holostylic_jaw_suspension ⓘ internal_fertilization ⓘ lack_of_scales_in_adults_except_for_placoid_spines ⓘ large_pectoral_fins_used_for_undulatory_swimming ⓘ long_tapering_tail_in_many_species ⓘ males_with_additional_cephalic_claspers_in_some_species ⓘ males_with_claspers ⓘ reduced_or_absent_spiracle ⓘ relatively_large_head ⓘ single_external_gill_opening_on_each_side ⓘ tooth_plates_instead_of_replacing_individual_teeth ⓘ upper_jaw_fused_to_cranium ⓘ venomous_dorsal_spine_in_many_species ⓘ |
| hasFossilRecord | rich_Paleozoic_fossil_record ⓘ |
| hasSensorySystem |
electroreception
ⓘ
lateral_line_system ⓘ |
| includes |
Chimaeriformes
ⓘ
chimaeras ⓘ ghost sharks ⓘ ratfishes ⓘ |
| kingdom | Animalia ⓘ |
| partOf | Chondrichthyes ⓘ |
| phylum | Chordata ⓘ |
| reproduction | oviparous ⓘ |
| sisterGroupOf | Elasmobranchii ⓘ |
| subphylum | Vertebrata ⓘ |
| taxonRank | subclass ⓘ |
| typicalHabitat |
benthic_environments
ⓘ
continental_slopes ⓘ deep_sea ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.