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Questions tagged [taxonomy]

Questions on the classification of biological organisms, and the methods used for classifying them.

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2answers
44 views

What does it mean to share similarities among living organisms “both horizontally and vertically”?

I came across the following lines in a textbook (NCERT biology for class 11). Systematic and monumental description of life forms, brought in, out of necessity, detailed systems of identification, ...
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1answer
38 views

Why are Excavata called “Excavata”?

The explanation given in my textbook is: Some members of this diverse group also have an “excavated” feeding groove on one side of the cell body. (Campbell Biology) This still isn't clear, ...
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Taxonomic hierarchy VS Hierarchical classification?

What are the differences between the two terms? I'm asked to identify the taxonomic hierarchy of an animal based on the hierarchical classification. Are they talking about the pyramid of "domain, ...
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1answer
91 views

Helix aspersa or Cornu aspersum

The common garden snail was originally assigned as Helix aspersa and stayed that way for over 200 years. Recently, some biologists assigned it to the genus or subgenus Cornu renaming it to Cornu ...
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1answer
141 views

Looking for the closest example of life forms similar to some mathematical patterns

Caveat: this is my first question here, it is quite interdisciplinary, but I hope to be in the correct place to ask. I am a user of Mathematics Stack Exchange since some years ago, and this question ...
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2answers
264 views

Why are bovines different genera if they can interbreed?

Why are bovinae a "subfamily", above Genus, when members can interbreed? Some like the beefalo are fertile, which is the normal defining characteristic of a species. And Genus are groups more ...
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4answers
1k views

Skull mystery on beach

The skull was found on a beach on the Sechelt inlet on Canada's pacific coast. A marine environment. What species is this skull from?
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1answer
1k views

Family tree for edible plants?

I am looking for a family tree for plants, particularly veg / herbs / fruit. Something similar to: If it could be slightly less technical than all the Latin ...
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32 views

What is the current status of the taxon Crocodylus raninus?

What is the current status of the taxon Crocodylus raninus, the Borneo Crocodile? See Wikipedia Is it now a valid species, a subspecies of Crocodylus porosus (The Saltwater Crocodile) or merely a ...
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5answers
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Is there a downloadable list of all species along with their traditional classification?

I'm looking for a downloadable list of all known (or better said, online documented) species in this straightforward format, as an example the European Frog: Kingdom: Animalia Division: Chordata ...
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1answer
15k views

Can prawns be classified as fish, or is their position ambiguous?

Today a zoologist told me that prawns and fish are very similar, but zoologists/taxonomists have put them in different categories because their distinction is unclear (like hydrogen in the periodic ...
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1answer
738 views

Is a lion a bony fish?

If you ask Wikidata "Does the species lion (Q140) have a parent taxon line up to the Osteichthyes (Q27207, bony fishes)?", it answers yes: ...
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How does taxonomy work? The case of the Avian Dinosaurs

I recently discovered that the class Aves (or Birds) has been renamed Avian Dinosaurs. My question is when this taxonomic denomination achieved the consensus of the scientific community and through ...
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2answers
58 views

What is a “Valid Species”?

I read in a reference book on Google Books (Biology of Termites: a Modern Synthesis, eds. Bignell, Roisin, and Lo) that the termite Heterotermes perfidus found on the South Atlantic island of St ...
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0answers
71 views

What are the sufficient criteria that make an entity a living homo sapiens? [closed]

When I say criteria I mean like x biological functions or y genetics. If it were to be appearance,anatomy. A corpse completely looks like a man. Moreover a person who has had their 4 limbs amputated, ...
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Laurasia and Gondwana [closed]

The Cambrian explosion was 540 mya. Laurasia and Gondwana didnt collide until 330 mya. So for 210 million years the land was divided into two large continents. Plants and insects had already colonized ...
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1answer
43 views

Are there species which is debatable if they should be classified as animals or plants?

I'm watching a sci fi series and a character who is a biologist claims "even on Earth there are species which is debatable if they should be classified as animals or plants". I looked for examples of ...
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Database for Macroinvertebrate Taxonomy

I compiled different data sets of invertebrate occurrences across some countries and now I want to ensure that all the taxonomic information is homogenized and correct. To this end, I am looking for a ...
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2answers
75 views

Is there a way tell apart dinosaurs from similar extinct reptiles?

When I was a child, I thought I knew what a dinosaur was. But, as I grew older, I was told that many of the extinct species that I thought were dinosaurs (dimetrodons, pterosaurs, plesiosaurs, etc.) ...
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12 views

What type of beetle is this? (Black, with long “mouth”)

I need to identify this beetle specimen. It is found in Malaysia
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1answer
175 views

Do Osteichthyes fishes have any cartilage?

Higher vertebrates, such as mammals, birds, reptiles and amphibians have both bone and cartilage. But do Osteichthyes fish (Bony fish) have any cartilage? Or do they only have bones? I've searched ...
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6answers
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Do humans have enough biological differences to be grouped into races or subspecies?

After my online research on the subject, I learnt that, biologically speaking, many scientists believe that there is no such thing as a race. Homo sapiens as a species is only 200,000 years old, which ...
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1answer
56 views

What are the differences between insects and spiders?

I have always been told that a spider is not an insect, since the former has 8 legs and the latter 6 legs. Is it just a matter of definition and spiders could have been defined as "8-legged insects"? ...
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1answer
44 views

What sauropod genera had a double row of chevron bones in the tail?

I know that Diplodocus is marked by the feature of having a double row of or "double-beamed" chevron bones in the tail, but how diagnostic is this feature if several other sauropods have it? I mean, ...
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1answer
31 views

How to define ammonites?

I miss the definition of ammonite. In my opinion, many authors confuse the term "Ammonite" and "Ammonoid". Ammonoids (Ammonoidea) are large group of cephalopods including for example goniatites (...
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How do we know that ammonites are a kind of cephalopod rather than another type of mollusc?

On a recent fossil hunting trip, I found a small fossil that an expert identified for me as an ammonite beak. He told me such fossils are not uncommon, but are not normally found with their parent ...
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How are asexual species classified?

Are there multiple distinct genetic lineages of asexual species that are closely enough related to not be considered distinct or does any genetic change result in a new species? I would assume there'...
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1answer
57 views

Why is Cannabis Sativa considered a distinct form of Cannabis?

My understanding is that the word Sativa is Latin and means "cultivated." See here: https://en.wikipedia.org/wiki/Sativum Since all cannabis consumed by people is cultivated and grown from seed, ...
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1answer
62 views

Did Plant Cells Evolve from Animal, Protist, or Fungal Cells?

I know protists and animals preceded plants but I am unaware of when fungi arose in relation to plants. At the moment, I cannot find a resource stating how plants evolved from existing kingdoms, or ...
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2answers
251 views

What is (probably) the closest living relative of the trilobite?

The trilobites vanished from the fossil record many millions of years ago, but they were obviously arthropods of some sort. Do we know which animals are their closest living relatives? I've heard both ...
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1answer
3k views

If birds are dinosaurs, then are mammals reptiles?

I'm just curious - it seems generally accepted that birds are dinosaurs. If that's the case, then can we call all mammals reptiles? Can we go even further and call humans amphibians? And since single-...
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27 views

Is Wikipedia a good source of taxonomy? [duplicate]

I have been quite interested in biology lately,and I would like to know whether it is a good choice to look up taxonomic information there.
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7answers
9k views

Why isn't a virus “alive”?

The recent news about a new supermassive virus being discovered got me thinking about how we define viruses as non-living organisms whilst they are bigger than bacteria, and much more complex than we ...
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2answers
134 views

Why aren't mammals and reptiles considered amphibians?

We've all heard it: birds descend from dinosaurs, so they're dinosaurs too. But this got me thinking: doesn't this mean that, for instance, all terrestrial vertebrates – including humans – are ...
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0answers
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Using spp. for taxa other than Genus

Can spp. be used for taxa other than genus ? For example Noctuidae spp. meaning certain genera in the Noctuidae family.
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24 views

How many proteins are common to all species? [duplicate]

Are there any proteins that are common to every Species in Earth's biosphere? If so, how many? If not, are there any proteins common to every species of an entire Kingdom? If so, how many? If not, ...
2
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1answer
81 views

Taxonomy problems on algae: Is Cryptophyta a Phylum or a Class rank?

I am currently interested in algae taxonomy (I am not an expert in the field). I retrieved the taxonomy of my sequences with their NCBI access number via the taxonkit software (https://bioinf....
3
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1answer
66 views

Identifying flying insect from southern Poland / Upper Silesia area

Yesterday evening, I spotted this quite huge insect at my home in southern Poland (the exact location of the place). Unfortunately, I have only a very low quality pictures available at the moment: ...
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2answers
450 views

Can two different species in the same genus generally succeed in the same habitat?

This plant-care website writes In the context of plant care, usually most plants within the same genus need the same environmental conditions suitable for plant growth. If the genus of a plant is ...
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2answers
148 views

Are Triceratops and Eotriceratops similar enough to be considered as the same genus?

Everybody knows Triceratops, the horned dinosaur from Late Cretaceous North America, who lived 68-66 MYA. In 2007, Eotriceratops xerinsularis was named and described (Wikipedia). It lived in (what is ...
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0answers
35 views

Pre-linnaean names, where can I ask about current IDs?

I run a large website with lots of historical herb books. For the older ones, finding out current botanical names is very difficult. Can I ask here? If not, does anybody know where I could ask what ...
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1answer
50 views

Are All Taxonomic Groups Uniquely Named?

The Linnaean classification system classifies and groups organisms into taxonomic groups: Kingdom, Phylum, Class, etc. Obviously, a clade at any taxonomic level is uniquely determined by its ...
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1answer
85 views

Why is “VOLVOX” not considered to be in PROTOZA?

Volovox is an Algae, but it moves with the help of Flagella. Protozoa has members that move by Flagella. Why is Volovox taxonomically in the Algae instead of Protozoa?
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5answers
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Are mature erythrocytes prokaryotic?

Mature mammalian erythrocytes have all the characteristics of a eukaryotic cell except that they don't have a nucleus, they don't have any cell organelles. Does this mean that erythrocytes are ...
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How related do life forms need to be to produce hybrids?

Specifically, I'm asking about infertile hybrids like ligers, mules, camas, etc. How closely related do animals need to be?
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1answer
263 views

Are bears related to dogs in a similar way to how cats are related to 'panthers'?

I've tried searching on Wikipedia but I couldn't find what family dogs belonged to. Ursidae is 'bears' and Canis is 'dogs' ; Panthera is big cats like:- tigers and jaguars is what I know.
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1answer
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Why is the spirit bear/Kermode bear a subspecies of the American black bear Ursus americanus?

The Kermode bear Ursus americanus kermodei is only found in British Columbia,Canada. The Kermode bear has single nucleotide polymorphism at the melanocortin 1 receptor gene (mc1r) locus which cause ...
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4answers
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Why do both the mango and the bee have “Indica” in their binomial name?

In my textbook, it is written that the binomial name of mango is Mangifera indica and the binomial name of a bee is Apis indica. Now in the name the second part is the name of species. But mango and ...
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2answers
200 views

Did Carl Linnaeus ever name a species he never saw?

According to this post Carl Linnaeus named more than 13,000 species which is definitely quite impressive. If we consider a 50 years career it makes about 5 species per week! It would feel impressive ...