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Histionotus
Taxonomy
Histionotus was named by Egerton (1854) [Sepkoski's age data: J Kimm K l Sepkoski's reference number: 452].
It was assigned to Macrosemiidae by Woodward (1895), Woodward (1918), Bartram (1977); and to Macrosemiiformes by Sepkoski (2002).
It was assigned to Macrosemiidae by Woodward (1895), Woodward (1918), Bartram (1977); and to Macrosemiiformes by Sepkoski (2002).
Species
Entered
by J. Sepkoski on 2003-01-23; modified by D. Sinopoli on 2026-06-10
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Histionotus Egerton 1854
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†Histionotus angularis Egerton 1854
†Histionotus falsani Thiollière 1873
†Histionotus oberndorferi Wagner 1863
†Histionotus parvus Vetter 1881
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. S. Woodward 1918 | Head large , snout acute ; dorsal margin of trunk rising above the head to an angulation from which the body gradually tapers backwards . Styliform marginal teeth very slender and closely arranged . Slime - canals on head and preoperculum comparatively large . Notochord surrounded by ring - vertebræ ; ribs ossified . Fins consisting of distally bifurcating rays , all with A - shaped fulcra ; pectoral fins much larger than the pelvic pair ; dorsal fin arising at the angulation of the back , extending to the caudal pedicle , high in front , low behind ; anal fin small ; caudal fin forked . Scales covering the whole of the trunk , in regular series , united by peg - and - socket articulation , and more or less pectinated at the hinder border ; scales of middle of flank and some of dorsal region deeper than broad , the flank - scales with more or less convex hinder border ; ventral scales at least as broad as deep ; postclavicular scales very large ; caudal ridge - scales not much enlarged | |
| A. W. H. Bartram 1977 | Medium to large, deep-bodied macrosemiid fishes; dorsal profile of trunk bent at
first dorsal fin-ray; ganoine present on frontals and parietals, frontoparietal suture straight; supraorbitals large; gape very small, the jaw articulation lying anterior to the orbit; dentigerous expansion of maxilla pierced by small foramen, upper and lower borders concave, posterior edge convex, teeth absent or greatly reduced; dentary with closely-set styliform teeth; anterior edge of preopercular forming a smooth curve, sensory canal with many pores in dorsal arm; opercular, subopercular, interopercular and uppermost branchiostegal ray with radiating ridges of ganoine; leading ray of pectoral fin bearing long ridges of ganoine, probably fused fringing fulcra; base of anal fin compact, leading ray extending below caudal fin and bearing fringing fulcra; caudal fin deeply forked; dorsal fin divided, extending from dorsal angulation to the caudal peduncle, rays bifurcating profusely, leading ray bearing deeply overlapping fringing fulcra and greatly elongated, remaining rays of anterior dorsal decreasing rapidly in height to form a concave upper profile; posterior dorsal fin low, convex; vertebral centra forming thick cylinders; squamation forming pattern of deepened hexagons on trunk, scales adjoining dorsal fin each extended posteriorly along their dorsal edges and bearing pits of dorsal lateral line; postcleithral scales large, bearing ganoine ridges |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, p = phylum | |||||
| References: Hendy et al. 2009, Bambach et al. 2007, Kiessling 2004, Carroll 1988 | |||||
Age range: Berriasian or 143.10000 to 137.05000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Berriasian | United Kingdom (England) | H. angularis (52301 131852 131980) |