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Within New Species

Cryptic Species Are Not Cryptids

Cryptic species are real lookalikes separated by expert evidence, not legendary animals supported mainly by sightings.

On this page

  • What cryptic species means in biology
  • How DNA and anatomy reveal lookalikes
  • Why the term is misused in cryptid debates
Preview for Cryptic Species Are Not Cryptids

Introduction

One of the most persistent misunderstandings in discussions of cryptozoology is the assumption that a “cryptic species” is simply a scientific term for a cryptid. In biology, however, the word cryptic has a very specific meaning. A cryptic species is a real, existing species that closely resembles another species and is only recognised as distinct through careful scientific investigation. A cryptid, by contrast, is a proposed animal whose existence remains unconfirmed and is usually supported primarily by sightings, folklore, anecdotes or ambiguous evidence.[Nature+2PMC]nature.comCryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…Cryptic Species illustration 1 This distinction matters because discoveries of cryptic species are sometimes cited as evidence that famous cryptids might also exist. Yet the two phenomena involve fundamentally different kinds of uncertainty. Cryptic species are uncovered through specimens, genetics, anatomy, behaviour and taxonomy. Cryptids remain hypothetical until comparable evidence exists.

What Cryptic Species Means in Biology

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How DNA and Anatomy Reveal Hidden Lookalikes

Modern molecular techniques have transformed species identification. DNA barcoding, genome sequencing and multi-gene analyses allow researchers to compare populations at a level impossible for earlier generations of taxonomists. These methods frequently reveal deep genetic divisions among animals that look nearly identical.[Nature+2PMC]nature.comCryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…

A famous example involves the Neotropical skipper butterfly Astraptes fulgerator. Once treated as a single species, DNA barcoding revealed that it actually represented at least ten distinct species that differed in genetics and ecology despite their similar appearance.[PMC]pmc.ncbi.nlm.nih.govPMCTen species in one: DNA barcoding reveals crypticby PDN Hebert · 2004 · Cited by 4975 — Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly…

The process rarely relies on DNA alone. Researchers typically combine several lines of evidence:<div class="content-enhancement content-enhancement--insight-grid" markdown="1">

  • Genetic differences between populations.
  • Anatomical traits that become visible after detailed examination.
  • Distinct mating behaviours or calls.
  • Ecological specialisations.
  • Evidence that populations do not exchange genes in nature.[PMC+2Nature]pmc.ncbi.nlm.nih.govHow we study cryptic species and their biological implicationsby CP Shin · 2023 · Cited by 53 — This study reviews how cryptic species…</div>

Giraffes provide a useful illustration. For many years they were treated as a single species with multiple subspecies. Genetic analyses later indicated that several giraffe lineages experience little or no gene flow and have been evolving separately for hundreds of thousands of years, leading many researchers to recognise four species rather than one. The animals were always known to science; the discovery concerned their true evolutionary relationships, not their existence.[Giraffe Conservation Foundation+3Cell+3Senckenberg Naturforschung]cell.comMulti-locus Analyses Reveal Four Giraffe Species Instead…by J Fennessy · 2016 · Cited by 326 — Two previously recognized subspecie…

Similar findings have occurred across insects, fish, reptiles, mammals and plants, demonstrating that hidden biodiversity often exists in plain sight.[National Geographic]nationalgeographic.comNational GeographicHiding in plain sight, 'cryptic species' may be all around us14 Feb 2022 — Scientists have discovered cryptic fish, bu…Cryptic Species illustration 2

Why Cryptic Species Are Not Evidence for Cryptids

The confusion arises because both cryptic species and cryptids involve something previously unknown. Yet the unknown element is very different.

With cryptic species, scientists begin with physical organisms already collected, photographed, observed or preserved in museums. The question is whether those organisms belong to one species or several. With cryptids, the question is usually whether the organism exists at all.[Nature+2PMC]nature.comCryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…

Consider the contrast:

Cryptic SpeciesCryptidExistence already confirmedExistence unconfirmedSupported by specimens and scientific analysisOften supported mainly by sightings or folkloreTaxonomic problemExistence problemUsually resembles known speciesOften proposed as a large, unusual or legendary animalResolved through genetics, anatomy and reproduction studiesRequires physical evidence before scientific acceptance

10 Cryptids That Turned Out To Actually Exist

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Why the Term Is Misused in Cryptid Debates

The misuse often stems from a rhetorical shortcut. Someone notes that scientists continue discovering new species and then argues that famous cryptids could therefore be real. This skips over the crucial question of what kind of species are being discovered.[National Geographic]nationalgeographic.comNational GeographicHiding in plain sight, 'cryptic species' may be all around us14 Feb 2022 — Scientists have discovered cryptic fish, bu…

Many newly recognised species are cryptic species uncovered through laboratory analysis, museum research or detailed field studies. They are not giant animals repeatedly observed by the public but somehow never documented conclusively. The discovery process usually involves refining existing knowledge rather than overturning it.[Nature+2PMC]nature.comCryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…

Another source of confusion is the similarity of the words cryptic and cryptid. In biology, cryptic refers to hidden identity. In cryptozoology, cryptid refers to an animal whose existence remains disputed. The terms sound related, but they describe different concepts.[Nature+2PMC]nature.comCryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…Cryptic Species illustration 3

What Cryptic Species Actually Tell Us About Unknown Animals

DNA Barcoding

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Endnotes

1. Source: nature.com
Link:https://www.nature.com/nature-index/topics/l4/cryptic-species-diversity-and-taxonomy

<summary>Source snippet</summary><p>Cryptic Species Diversity and TaxonomyCryptic species are genetically distinct lineages that exhibit minimal or no diagnosable morp…</p>

2. Source: pmc.ncbi.nlm.nih.gov
Link:https://pmc.ncbi.nlm.nih.gov/articles/PMC10480071/

<summary>Source snippet</summary><p>How we study cryptic species and their biological implicationsby CP Shin · 2023 · Cited by 53 — This study reviews how cryptic species…</p>

3. Source: Wikipedia
Title: List of cryptids
Link:https://en.wikipedia.org/wiki/List_of_cryptids

4. Source: openpress.wheatoncollege.edu
Link:https://openpress.wheatoncollege.edu/molecularecologyv1/chapter/cryptic-species/

<summary>Source snippet</summary><p>Cryptic Species – Molecular Ecology & EvolutionFor example, in the butterfly genus Astraptes, what was once thought to be a single specie…</p>

5. Source: pmc.ncbi.nlm.nih.gov
Title: PMCTen species in one: DNA barcoding reveals cryptic
Link:https://pmc.ncbi.nlm.nih.gov/articles/PMC522015/

<summary>Source snippet</summary><p>by PDN Hebert · 2004 · Cited by 4975 — Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly…</p>

6. Source: nature.com
Link:https://www.nature.com/articles/s41598-017-02938-z

<summary>Source snippet</summary><p>The importance of naming cryptic species and…by T Delić · 2017 · Cited by 247 — Molecular taxonomy often uncovers cryptic specie…</p>

7. Source: cell.com
Link:https://www.cell.com/fulltext/S0960-9822%2816%2930787-4

<summary>Source snippet</summary><p>Multi-locus Analyses Reveal Four Giraffe Species Instead…by J Fennessy · 2016 · Cited by 326 — Two previously recognized subspecie…</p>

8. Source: senckenberg.de
Title: giraffe genomics support four species
Link:https://www.senckenberg.de/en/press-releases/giraffe-genomics-support-four-species/

<summary>Source snippet</summary><p>Senckenberg NaturforschungGiraffe genomics support four species | Press Releases5 May 2021 — The analysis of about 200,000 positions on D…</p>
Published: May 2021

9. Source: pmc.ncbi.nlm.nih.gov
Link:https://pmc.ncbi.nlm.nih.gov/articles/PMC6206193/

<summary>Source snippet</summary><p>camelopardalis) and nine subspecies. However, multi‐locus analyses of all subspecies have…Read more…</p>

10. Source: youtube.com
Title: TEDx Adelaide
Link:https://www.youtube.com/watch?v=M_qzYHfeDac

<summary>Source snippet</summary><p>DNA Barcoding…</p>

11. Source: youtube.com
Title: DNA Barcoding
Link:https://www.youtube.com/watch?v=9YGM6L8bzxg

<summary>Source snippet</summary><p>Seminar: Patterns and processes of cryptic species: understanding hidden diversity in the ocean…</p>

12. Source: nationalgeographic.com
Link:https://www.nationalgeographic.com/animals/article/hiding-in-plain-sight-cryptic-species-may-be-all-around-us

<summary>Source snippet</summary><p>National GeographicHiding in plain sight, 'cryptic species' may be all around us14 Feb 2022 — Scientists have discovered cryptic fish, bu…</p>

13. Source: giraffeconservation.org
Title: genetic analysis uncovers four species giraffe not just one
Link:https://giraffeconservation.org/genetic-analysis-uncovers-four-species-giraffe-not-just-one/

<summary>Source snippet</summary><p>Giraffe Conservation FoundationGenetic Analysis Uncovers Four Species of Giraffe, Not…8 Sept 2016 — Those four species include (1) nor…</p>

14. Source: dragonflyissuesinevolution13.fandom.com
Title: Cryptic species
Link:https://dragonflyissuesinevolution13.fandom.com/wiki/Cryptic_species

<summary>Source snippet</summary><p>In 2001 a study revealed that there are two non-interbreeding, genetically distinct species: the…Read more…</p>

15. Source: ebsco.com
Link:https://www.ebsco.com/research-starters/science/cryptozoology

Additional References

16. Source: bohrium.com
Link:https://www.bohrium.com/en/sciencepedia/feynman/keyword/cryptic_species

<summary>Source snippet</summary><p>Cryptic Species: Unmasking Hidden BiodiversityCryptic species are two or more distinct species that are classified as a single species be…</p>

17. Source: aktuelles.uni-frankfurt.de
Link:https://aktuelles.uni-frankfurt.de/en/english/comprehensive-genetic-analyses-confirm-four-different-giraffe-species-and-seven-subspecies/

<summary>Source snippet</summary><p>genetic analyses confirm four different giraffe…6 May 2021 — The analysis of about 200,000 positions on DNA from a total of 50 giraffe…</p>
Published: May 2021

18. Source: theguardian.com
Title: discovery of cryptic species shows earth is even more biologically diverse aoe
Link:https://www.theguardian.com/environment/2020/dec/25/discovery-of-cryptic-species-shows-earth-is-even-more-biologically-diverse-aoe

<summary>Source snippet</summary><p>Discovery of 'cryptic species' shows Earth is even more…25 Dec 2020 — The revelation of the butterfly as a cryptic species could mean…</p>

19. Source: youtube.com
Link:https://www.youtube.com/watch?v=fTcJ2YeAwN0

<summary>Source snippet</summary><p>10 Cryptids That Turned Out To Actually ExistIn this video, we're taking a look at 10 species that were once considered Cryptids…. The…</p>

20. Source: a-z-animals.com
Title: scientists reveal hidden species hiding in plain sight around the world
Link:https://a-z-animals.com/articles/scientists-reveal-hidden-species-hiding-in-plain-sight-around-the-world/

<summary>Source snippet</summary><p>Scientists Reveal Hidden Species Hiding in Plain Sight…18 Mar 2026 — New research suggests that for every known vertebrate species, tw…</p>

21. Source: opwall.com
Link:https://www.opwall.com/article/how-is-a-new-species-described/

<summary>Source snippet</summary><p>, birds, reptiles, and a diverse range of invertebrates, plants, and fungi.Read more…</p>

22. Source: facebook.com
Link:https://www.facebook.com/NatGeoHistory/posts/cryptic-species-look-identical-but-are-genetically-or-otherwise-distinct-the-loo/10160883392148336/

<summary>Source snippet</summary><p>The look-alikes are everywhere, even among the most intensely studied…Read more…</p>

23. Source: researchgate.net
Link:https://www.researchgate.net/publication/342295491_Anthropology_and_Cryptozoology_Exploring_Encounters_with_Mysterious_Creatures_edited_by_Samantha_Hurn_and_Chris_Wilbert_in_the_series_Multispecies_Encounters

<summary>Source snippet</summary><p>ited by Samantha Hurn and Chris Wilbert (in the series Multispecies Encounters)…</p>

24. Source: rcannon992.com
Link:https://rcannon992.com/2022/12/17/hidden-in-plain-sight-cryptic-insect-species/

<summary>Source snippet</summary><p>y morphologically indistinguishable, biological groups that are…Read more…</p>

25. Source: facebook.com
Title: cryptic species look identical but are genetically or otherwise distinct the loo
Link:https://www.facebook.com/NatGeoHistory/posts/cryptic-species-look-identical-but-are-genetically-or-otherwise-distinct-the-loo/10160098131253336/

<summary>Source snippet</summary><p>Just like all taxa, species are explanatory hypotheses. Concrete things can be cryptic…</p>

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