Ameiurus melas
(Rafinesque, 1820) · speciesAt a glance
Sources11 archives
Databases and archives Ameiurus melas's data was compiled from.
WikipediaWikimedia Foundation11 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility47 431 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI6 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics189 specimens↗
Open Tree of LifeOpenTreephylogeny backbone↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
NCBIUS National Library of Medicinegenome & karyotype↗
WikidataWikimedia Foundationstructured facts↗
Catalogue of LifeCOLtaxonomy↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
The black bullhead or black bullhead catfish (Ameiurus melas) is a species of bullhead catfish. Like other bullhead catfish, it has the ability to thrive in waters that are low in oxygen, brackish, turbid and/or very warm.Black Bullhead Detailed Information – Montana Animal Field Guide It also has barbels located near its mouth, a broad head, spiny fins, and no scales. It can be identified from other bullheads as the barbels are black, and it has a tan crescent around the tail. Its caudal fin is truncated (squared off at the corners). Like virtually all catfish, it is nocturnal, preferring to feed at night, although young feed during the day. It generally does not get as large as the channel or blue catfish, with average adult weights are in the 1- to 2-lb range, and almost never as large as 4 lb. It has a typical length of 8-14 in, with the largest specimen being 24 in, making it the largest of the bullheads. It is typically black or dark brown on the dorsal side of its body and yellow or white on the ventral side. Like most of the bullheads (and even flathead catfish), it has a squared tail fin, which is strikingly different from the forked tail of channel and blue catfish. It is a bottom-rover fish, meaning it is well-adapted for bottom living. It is typically dorsoventrally flattened, and has a slightly humped back. Its color depends on the area where it is taken, but it generally is darker than brown or yellow bullheads. It can be distinguished from a flathead in that the black bullhead's lower lip does not protrude past the upper lip. Distinguishing it from the brown bullhead is a bit more difficult, depending on the area where it is caught, but a distinguishing detail between the two includes a nearly smooth pectoral spine on the black bullhead with the brown being strongly barbed. The anal fin also has a gray base, and the tail also has a pale bar. Also, the brown bullhead generally has 21 to 24 soft rays through its anal fin as opposed to the black bullhead's 17 to 21. The brown bullhead is also typically mottled brown and green on top instead of the darker black. Both the black and brown bullheads can easily be distinguished from the yellow bullhead as the yellow bullhead has white barbels under its mouth.Phillips, G.L, Schmid, W.D, & Underhill, J.C. (1991). Fishes of the Minnesota region. Minneapolis: University of Minnesota Press.
No narrative description available for this taxon yet.
Size & morphology2
Life cycle & reproduction5
Habitat & environment2
Uses & economy1
Other traits2
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Ameiurus melas has left across the world's sequence archives.
At a glance
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
Besides the big genome in the nucleus, cells carry a small, circular loop of DNA inside the cell's energy factories — the mitochondria. It is inherited almost only from the mother and is a leftover from ancient bacteria that moved into the cell. The mitochondrial markers above (ND*, COX, CYTB…) are read from exactly this loop. Outer ring = one strand, inner ring = the other.
The complete instruction manual Ameiurus melas carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
Record type47 431 records
Origin
Range
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions23 of 54 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| University of Texas Biodiversity Collections (UTBC)location not on record | 1 964 |
| Champaign, US | 804 |
| München, DE | 729 |
| Ann Arbor, US | 570 |
| Sam Noble Oklahoma Museum of Natural Historylocation not on record | 525 |
| University of Minnesota, James Ford Bell Museum of Natural Historylocation not on record | 398 |
| Texas Memorial Museum, Texas Natural History Collectionlocation not on record | 351 |
| Ohio State University - Fish Division, Columbus, OH (OSUM)location not on record | 233 |
| Chicago, US | 220 |
| University of Nebraska State Museumlocation not on record | 188 |
| Texas Cooperative Wildlife Collectionlocation not on record | 178 |
| Washington, US | 174 |
| Fort Hays State University, Sternberg Museumlocation not on record | 171 |
| University of Alabamalocation not on record | 145 |
| Toronto, CA | 117 |
| ASUlocation not on record | 90 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 82 |
| ISUAlocation not on record | 74 |
| Montgomery, US | 66 |
| Southeastern Louisiana University, Vertebrate Museumlocation not on record | 45 |
| Louisiana State University, Museum of Zoologylocation not on record | 43 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 42 |
| Cambridge, US | 34 |
| North Carolina Museum of Natural Scienceslocation not on record | 34 |
| University of Wyoming Museum of Vertebrateslocation not on record | 32 |
| San Nicolás de los Garza, MX | 19 |
| Tempe, US | 18 |
| Geneva, CH | 16 |
| Bonn, DE | 14 |
| Hermosillo, MX | 14 |
| Vancouver, CA | 13 |
| CASlocation not on record | 13 |
| APSUlocation not on record | 13 |
| New Haven, US | 11 |
| Los Angeles, US | 10 |
| Morelia, MX | 10 |
| Oregon State Universitylocation not on record | 9 |
| Museo civico di Storia naturale Giacomo Doria di Genova | Giacomo Doria Natural History Museum in Genoalocation not on record | 8 |
| Mexico City, MX | 7 |
| CEFElocation not on record | 6 |
| Iowa City, US | 5 |
| 4 | |
| South African Institute for Aquatic Biodiversitylocation not on record | 3 |
| University of California San Diegolocation not on record | 3 |
| University of Alberta Museumslocation not on record | 3 |
| Mexico City, MX | 2 |
| Royal Saskatchewan Museumlocation not on record | 2 |
| Western New Mexico University Museumlocation not on record | 2 |
| Paro, BT | 2 |
| Universidad de Navarra, Museum of Zoologylocation not on record | 1 |
| UCOCVlocation not on record | 1 |
| University of Nevada, Museum of Biologylocation not on record | 1 |
| UWFClocation not on record | 1 |
| Paris, FR | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Ameiurus melas was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Where its DNA was found
How strong is each trace?
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.