Eratigena atrica
(C.L.Koch, 1843) · speciesAt a glance
Sources11 archives
Databases and archives Eratigena atrica's data was compiled from.
WikipediaWikimedia Foundation8 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility13 885 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI130 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics121 specimens↗
World Spider Trait DBMasaryk University59 traits · 35 refs↗
World Spider CatalogNaturhist. Museum Bernworld catalog↗
Open Tree of LifeOpenTreephylogeny backbone↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
NCBIUS National Library of Medicinegenome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
The giant house spider has been treated as either one species, under the name Eratigena atrica, or as three species, E. atrica, E. duellica and E. saeva. , the three species view was accepted by the World Spider Catalog. They are among the largest spiders of Central and Northern Europe. They were previously placed in the genus Tegenaria. In 2013, they were moved to the new genus Eratigena as the single species Eratigena atrica. In 2018, the three separate species were restored. The bite of these species does not pose a threat to humans or pets, and they are generally reluctant to bite, preferring instead to hide or escape.
No narrative description available for this taxon yet.
Compiled from 35 sources
Morphometry42
Predation5
Ecology7
Physiology2
Biomechanics1
Anatomy1
Morphology1
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 Eratigena atrica 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.
The complete instruction manual Eratigena atrica 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).
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
2n 421×GoaT · Animal Chromosome Counts Database
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.
Record type13 885 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.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions16 of 35 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Helsinki, FI | 157 |
| Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)location not on record | 89 |
| Frankfurt am Main | 74 |
| Paro, BT | 73 |
| Bern, CH | 47 |
| Bonn, DE | 27 |
| 24 | |
| Copenhagen, DK | 11 |
| SLU Artdatabankenlocation not on record | 7 |
| Tartu, EE | 7 |
| Museum of Zoology at the University of Bergen, Invertebrate Collectionlocation not on record | 7 |
| Denver, US | 6 |
| South Kensington, GB | 5 |
| Zoologisches Museum Hamburglocation not on record | 4 |
| MZLUlocation not on record | 4 |
| Washington, US | 3 |
| Adam Mickiewicz University in Poznańlocation not on record | 3 |
| SNSB-Zoologische Staatssammlung Münchenlocation not on record | 3 |
| Geneva, CH | 3 |
| Uniwersytet w Białymstokulocation not on record | 3 |
| NTNU-VMlocation not on record | 3 |
| Musee d'Histoire Naturallelocation not on record | 2 |
| Radicondoli, IT | 1 |
| Essig Museum of Entomologylocation not on record | 1 |
| Centre for Biodiversity Genomicslocation not on record | 1 |
| Royal British Columbia Museumlocation not on record | 1 |
| neflocation not on record | 1 |
| SGAV-and-NHMDlocation not on record | 1 |
| University of Guelph, Centre for Biodiversity Genomicslocation not on record | 1 |
| Naturalis Biodiversity Centerlocation not on record | 1 |
| BioFokuslocation not on record | 1 |
| Ekaterinburg, RU | 1 |
| University of Lodz, Department of Invertebrate Zoology and Hydrobiologylocation not on record | 1 |
| Albuquerque, US | 1 |
| Philadelphia, US | 1 |
Where the DNA of Eratigena atrica 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?
Modelled climatemodelled
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.