 | Acanthodii or acanthodians is an extinct class of gnathostomes (jawed fishes). They are currently considered to represent a paraphyletic grade of various... 18 KB (1,392 words) - 17:03, 26 January 2024 |
 | lampreys) Gnathostomata or jawed vertebrates, which include: †Placodermi †Acanthodii Chondrichthyes or cartilaginous fish, (sharks, rays and ratfish) Osteichthyes... 77 KB (7,023 words) - 02:52, 10 April 2024 |
(chimaeras and extinct relatives) Class Placodermi (armoured fish) † Class Acanthodii ("spiny sharks", sometimes classified under Actinopterygii) † Superclass... 4 KB (526 words) - 12:20, 7 February 2024 |
 | extinct (armored gnathostomes) └Eugnathostomata (true jawed vertebrates) ├─Acanthodii (stem cartilaginous fish) └─Chondrichthyes (true cartilaginous fish) ├─Holocephali... 44 KB (2,435 words) - 04:21, 21 March 2024 |
 | gnathostomes) Class Chondrichthyes (cartilaginous fish; 900+ species) Class †Acanthodii (Paleozoic "spiny sharks"; paraphyletic in relation to Chondrichthyes)... 51 KB (4,719 words) - 06:08, 14 April 2024 |
 | List of chordate orders (section Class Acanthodii †) This article contains a list of all of the classes and orders that are located in the Phylum Chordata. Order Amphioxiformes Genus Pikaia † Order Enterogona... 14 KB (945 words) - 16:45, 25 April 2024 |
 | fish known as placoderms, which evolved from the ostracoderms; and the Acanthodii (or spiny sharks). The jawed fish that are still extant in modern days... 46 KB (4,511 words) - 16:55, 25 April 2024 |
Climatiiformes (category Acanthodii) The Climatiiformes is an order of extinct fish belonging to the class Acanthodii. Like most other "spiny sharks", the Climatiiformes had sharp spines.... 3 KB (248 words) - 16:15, 25 March 2024 |
 | Females attain a larger size than males. The largest of the now-extinct Acanthodii was Xylacanthus grandis, an ischnacanthiform based on a ~35 cm (14 in)... 75 KB (8,256 words) - 12:48, 28 April 2024 |
 | ? †Acanthodii... 101 KB (10,032 words) - 03:01, 24 April 2024 |
 | during evolution (e.g. additional dorsal fins, adipose fin). In some †Acanthodii ("spiny sharks"), one or more pairs of "intermediate" or "prepelvic" spines... 89 KB (7,622 words) - 11:43, 18 April 2024 |
 | Clade: Eugnathostomata Clade: Teleostomi C. L. Bonaparte, 1836 Subgroups †Acanthodii Euteleostomi ("Osteichthyes") Actinopterygii (majority of all fish) Sarcopterygii... 6 KB (458 words) - 12:56, 14 April 2024 |
 | Gavin F. (2008). "Promesacanthus eppleri n. gen., n. sp., a mesacanthid (Acanthodii, Acanthodiformes) from the Lower Devonian of northern Canada" (PDF). Geodiversitas... 2 KB (150 words) - 11:15, 18 April 2024 |
| Chondrichthyes †"Acanthodii" Elasmobranchii Holocephali... 32 KB (2,205 words) - 06:49, 24 April 2024 |
 | Cyclostomata, which includes lampreys and hagfishes. Paleontology portal Acanthodii Placoderm Benton, Michael (2009) Vertebrate Palaeontology Edition 3, page... 16 KB (1,032 words) - 00:26, 25 April 2024 |
| classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: †Acanthodii Order: †Ischnacanthiformes Family: †Acritolepidae Genus: †Nerepisacanthus... 2 KB (160 words) - 18:50, 17 April 2024 |
 | updated cladogram (Zhu et al., 2016): Paleontology portal Fish portal Acanthodii List of placoderms Ostracoderm Chondrichthyes Entelognathus If paraphyletic... 42 KB (4,235 words) - 16:47, 25 April 2024 |
 | †Placodermi (paraphyletic) Eugnathostomata Total group Chondrichthyes †Acanthodii (paraphyletic) Chondrichthyes (cartilaginous fishes) Osteichthyes (bony... 29 KB (1,984 words) - 12:20, 25 March 2024 |
 | List of acanthodian genera (category Acanthodii) comprehensive listing of all genera that have ever been included in the subclass Acanthodii, excluding purely vernacular terms. The list includes all commonly accepted... 84 KB (4,434 words) - 23:12, 11 April 2024 |
 | Gyracanthides (category Acanthodii genera) redescription and reinterpretation of Gyracanthides murrayi Woodward 1906 (Acanthodii, Gyracanthidae) from the Lower Carboniferous of the Mansfield Basin, Victoria... 3 KB (267 words) - 20:31, 28 March 2024 |
 | †Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii †Acanthodiformes †"Climatiiformes" †Diplacanthiformes †Ischnacanthiformes... 73 KB (6,359 words) - 11:44, 23 April 2024 |
 | †Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii †Acanthodiformes †"Climatiiformes" †Diplacanthiformes †Ischnacanthiformes... 96 KB (10,012 words) - 05:33, 7 April 2024 |
 | †Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii †Acanthodiformes †"Climatiiformes" †Diplacanthiformes †Ischnacanthiformes... 7 KB (500 words) - 11:23, 14 February 2024 |
 | Parameteoraspis reached up to 1 m (3.3 ft). The largest of the now-extinct Acanthodii was Xylacanthus grandis, an ischnacanthiform based on a ~35 cm (14 in)... 394 KB (40,005 words) - 06:03, 24 April 2024 |
 | Ischnacanthus is an extinct genus of jawed fish in the class Acanthodii. It lived during Pridoli to Lochkovian, type species I. gracilis is only known... 3 KB (308 words) - 20:59, 18 April 2024 |
 | the bony and cartilaginous fishes, and their extinct descendants, the Acanthodii (without cartilaginous fishes), are not included here. This list includes... 46 KB (951 words) - 16:52, 25 April 2024 |
 | Tetanopsyrus is a genus of Acanthodii. There are two species of this genus that lived through the lower Devonian (Lochkovian), some 416 to 359 million... 3 KB (215 words) - 20:43, 18 April 2024 |
 | †Ptyctodontida †Rhenanida †Acanthothoraci †Pseudopetalichthyida? †Stensioellida? †Acanthodii †Acanthodiformes †"Climatiiformes" †Diplacanthiformes †Ischnacanthiformes... 24 KB (2,477 words) - 17:23, 13 March 2024 |
 | Diplacanthus (category Acanthodii) Diplacanthus is an extinct genus of Mid to Late Devonian fish in the class Acanthodii, known as spiny sharks. The genus was named by Louis Agassiz in 1843.... 5 KB (479 words) - 20:27, 28 March 2024 |
 | fishes, ganoine or ganoine-like tissues are also found on the extinct acanthodii. It has been suggested that ganoine is homologous to tooth enamel in vertebrates... 4 KB (354 words) - 20:04, 20 July 2023 |