Questions tagged [species]

The basic unit of taxonomic classification.

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82
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5answers
27k views

How could humans have interbred with Neanderthals if we're a different species?

To be clear, I'm not doubting that homo sapiens and homo neanderthalensis did interbreed: of that much I'm convinced. Within the past few years I've seen an upcropping of pop-sci articles discussing ...
36
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1answer
7k views

Does it make sense to classify all humans in a single species?

For what biological reasons do we consider that all human beings belong to the same species? A Thai and a Nigerian share a common ancestor that is 140,000 years old (see Gravel et al. 2010 and this ...
20
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2answers
1k views

Have we ever observed two drosophila lineages that evolved reproductive isolation in labs?

Background The standard definition of species refers to the concept of reproductive isolation. If two lineages are found to be reproductively isolated, then we consider these two lineages to belong ...
19
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1answer
6k views

What is this black and white worm in a white case?

The case is very small and it's an off white color. The thing living inside can come out of either end. It's a black and white looking worm. It will poke its head out and move everywhere! They are ...
17
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2answers
2k views

Identify this insect, found in Central Vietnam, with long antennae, black wings, and red body [duplicate]

Last year this insect landed on my hand when visiting the My Son city ruins in Central Vietnam. I've been trying to identify the insect, but until now without result. Can you help me? Or do you know ...
15
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3answers
2k views

Is the size of the genome across species roughly the same?

Chromosome number differs across species. Is the amount of DNA comparable between organisms, just being split into smaller chunks in those species with more chromosomes, or do species have different ...
15
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4answers
2k views

Where can I get a file/list of the common and scientific names of species?

I am searching for an un-encoded data file with common and scientific names for example of a few hundred species or tens of thousands, where I can search the common and scientific labels of organisms.
14
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2answers
2k views

What is the term for “technical extinction” of yet alive animals?

What is the term for an event in which a species is still alive, but has no chance of future reproduction and the species will be considered extinct once the current generation dies out? For example ...
10
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3answers
4k views

Are there species that occupy several roles in the food hierarchy?

Are there species that occupy several roles in the food hierarchy? By role, I am referring to producer, primary consumer, secondary consumer, tertiary consumer, quaternary consumer and so on. ...
10
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1answer
777 views

Can scientists name themselves in the scientific name when they discover a new taxon?

There are sometimes people names in taxonomy, like Myotis keenii was names after Mr. Keen who contributed to discover the species. So, if you discover a species and someone else is constructing the ...
10
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2answers
209 views

Acknowledging differentiation of species, in historical times

This is at least partly an historical question, and I am not even remotely a biologist of any sort, so apologies beforehand if it's a little obscure. I often wonder how many distinctions were made in ...
9
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0answers
229 views

Do ring species exist?

In trying to understand evolution better, I have been looking at examples of speciation, and have thus come across the topic of ring species. I have tried to find concrete examples of how these work, ...
8
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2answers
2k views

Reasons why living fossils exist?

A living fossil is a living species (or clade) that appears to be similar to another species otherwise known only from fossils, typically with no close living relatives. A living fossil is ...
8
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2answers
631 views

Can someone tell me the species of this lizard?

It's a green lizard with a silver tail, and it has pretty, bluish eyes. I saw it today, July 26th, trying to get some shade on a hot, sunny day (32 degrees) at around 18:00 in Austin, TX USA. It's ...
8
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2answers
5k views

Why can't we call dog breeds different species?

I understand this question might fall into opinion based, but I'm trying to write it so that it meets the "Many good questions generate some degree of opinion based on expert experience" part and not ...
7
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1answer
2k views

Can I compare Shannon-Wiener diversity indices between plots of different sizes (area)?

Can I compare the Shannon-Wiener (a.k.a. Shannon-Weaver) Index of diversity ($H'$) of plots (communities) with varying sizes (areas)? If not, what steps do I need to take and/or which tests should ...
7
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2answers
163 views

Example of species that went extinct because of excessive hunting by non-humanoid predators?

I was wondering if there were any species that went extinct for being excessively hunted/eaten by predators? I don't mean human hunting. For example, I wish to know if there's a species of frog that ...
6
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2answers
457 views

Which species were first described by Charles Darwin?

There are many plants and animals named for the naturalist Charles Darwin, such as Darwin's Frog (Rhinoderma darwinii), but which were named by him? I'm finding it difficult to find such a list.
6
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1answer
33k views

Examples of animals with 12-28 legs?

Many commonly known animals' limbs usually number between 0 and 10. For example, a non-exhaustive list: snakes have 0 Members of Bipedidae have 2 legs. Birds and humans have 2 legs (but 4 limbs) Most ...
6
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1answer
589 views

What kind of snake is this

Found this outside on patio in northern Virginia, Ashburn area, September 2018. It's about 12 inches. Is it a water snake or rattlesnake?
6
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2answers
118 views

Why was the cackling goose split off as a distinct species from the Canada goose in 2004?

According to Wikipedia, in 2004 the American Ornithologists' Union made the cackling goose a new species, splitting it away from the Canada goose. The British followed suit in 2005. What was the ...
6
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1answer
431 views

What kind of spider is this (reddish spider)?

I just saw this spider on my door and was wondering what kind of spider this is. information Country: The Netherlands (Europe) Color: quite reddish (maybe an idea why this one is reddish?) pictures
6
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1answer
457 views

Cross-integration of puma subspecies populations

A major concern of conservationists in south Florida is the population of native Pumas, the Florida Panther. Until recently, it was thought that the Pumas were a genetically distinct subspecies, ...
6
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1answer
71 views

Where should I go for online information on animals endemic specifically in Mozambique?

I've been involved with the citizen science project "Wildcam Gorongosa" for over half a year now (website, forum). As there are lots of unexperienced volunteers, many questions are being asked. Often ...
6
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1answer
100 views

Plural of “dibamus”

Migrated from English site. Dibamus is a genus of legless lizards in the family Dibamidae, of the infraorder Dibamia. Genera are usually given in singular, so what is the correct plural of Dibamus? ...
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2answers
1k views

Living intermediate species?

Hypothetical question regarding three animals 'species' {A, B, C}. Are there any examples in nature where {A and B} cannot regularly produce viable offspring, however {A and C} and {B and C} can ...
5
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1answer
15k views

Complete list of touch sensitive plants

I am not sure whether the word "touch sensitive" is precise enough. What I am looking for is a list of plants that respond to touch noticably like Mimosa Pudica. I only know of Mimosa Pudica example. ...
5
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1answer
113 views

Is transplantation of neurons between species possible?

Can brain tissue from one species be implanted into the brain of another species? Because the brain is tolerant to the introduction of antigens (it is said to be immuno-privileged), I was wondering ...
5
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2answers
1k views

Is it possible there were multiple origins of life? And, if so, why did the one which became the common ancestor between all organisms prevail?

I have learned that all currently-living organisms come from a common ancestor, which I theoretically understand. However, my professor in a class mentioned that there is a chance that there were ...
5
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1answer
475 views

What kind of spider is this and is it dangerous?

Found this spider on my couch the other day in Steubenville, Ohio. The spider is about 1 - 1.5'' (2.5 - 4 cm) long. The spider looks brownish in the image, but tends to a pale yellow color in reality.
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0answers
83 views

How do similar looking carps, but belonging to different species, differ from each other?

There are some carps which differ in colour, or has some easily noticeable morphological differences. But apart from that, most of the carps look "almost" the same. How does one differentiate one ...
4
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4answers
485 views

Biodiversity is restricted by genome combinatorics?

Me and some friends are interested in opinions for the following: Conjecture The maximum number of species must be limited by the maximum combinatorial/permutational space that can be occupied ...
4
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1answer
321 views

Was Darwin aware of the difficulties behind the concept of species?

Introduction The concept of species is a very old concept that suffers from not being a natural category. There exists no single definition that would categorize living beings into groups and that ...
4
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2answers
92 views

Looking for a database of plant features

To perform some private data science experiments I am looking for accessible information on morphological plant features (tabular information would be best). Crawling the web I found many websites ...
4
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1answer
141 views

Can anyone identify this bird - small flock in ireland?

I saw small birds in a flock of about 6 or 8. Here are details that can be seen on my best photo - The beak looks pointed and also the legs are quite long and the eye has a bar across it. I have a ...
4
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1answer
432 views

How do cats survive falling from great heights?

Among mammals, cats are able to land safely when falling from great heights. For example, when compared to dogs or humans they can survive drops from relative large heights. How do they manage? A ...
4
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1answer
133 views

Which requirements are needed for 2 different species to be able to have offsprings?

Sometimes different species mate and they are able to have offsprings, usually with anomalies. Are there known requirements for 2 different species to produce offsprings? Why species like the lion and ...
4
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2answers
259 views

Is there a definition of species where Lions and Tigers are the same species?

According to Species concepts There are at least 26 recognized species concepts And according to Why are lions and tigers considered different species (not sure how reliable this source is though, ...
4
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3answers
149 views

What makes an E.coli an E.coli, genotype or phenotype?

According to this paper, among 61 strains of E. coli they studied only 6% of the genes are common in all. Which means that the overwhelming majority of the genes are not shared. And wikipedia ...
4
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1answer
169 views

Minor differences in morphology of a snake: Why designate it a different species?

I was motivated to ask based on an answer to another question that I read on SE-Biology: You can differentiate this species [Ashok's Bronzeback (Dendrelaphis ashoki)] from closely related D. ...
4
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1answer
131 views

Insect identification, Bangalore India

Can anyone identify this insect? It was sitting on my refrigerator. Size: approximately 1 cm height, 1 inch across My location: Bangalore, India
4
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1answer
415 views

Are there examples of now-living species where one is descended from the other?

I'm not a biology person so please forgive me if this question is formulated badly :) I'm curious. Are there any species that has an ancestor species that is still alive today?
4
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1answer
361 views

Is this a variety of banana slug (Ariolimax columbianus)? (California)

These very dark (dark grey to black) banana slugs are an anomaly. I live on the north coast of California and see many slugs every day. These particular slugs I find only on the west-facing headlands ...
4
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1answer
54 views

Besides X. morgani praedicta, are there any species whose existence was predicted before they were discovered?

The orchid A. sesquipedale has a spur so long that at the time of its discovery, no insect was known that could pollinate it. This led Charles Darwin to predict the existence of an undiscovered moth ...
4
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1answer
9k views

What is the difference between a species tree, a gene tree and a phylogenetic tree?

I have found websites and text books disagreeing over this. For example, Phylogenies are also known as “species trees”... http://biologos.org/blogs/dennis-venema-letters-to-the-duchess/evolution-...
4
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1answer
174 views

Confusion regarding niches in evolution theory

This is the definition of a niche from Crash Course: An area of the environment that requires a special set of skills or traits to extract food and reproduce. Obviously, this version of the ...
4
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1answer
91 views

Interbreedability between current humans and his ancestors

I want to know the first point of time in the past when genomes have diverged so far from modern human genomes so that they both (human and ancestors) are not interbreeadable anymore and can be seen ...
4
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1answer
205 views

How does one confirm the discovery of a new species of plant/animal

Hearing from the National Geographic and the news about the discoveries of new species of plants/animals, I was wondering how can a person confirm when they have actually discovered a new species of ...
4
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1answer
469 views

How can I calculate Shannon-Wiener diversity index in caves with different kind of habitats and different sampling methods?

I would like to start a monitoring in different caves, compare caves of different age and length, and find out if there are any correlations between these factors and their diversity. I was thinking ...
4
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0answers
36 views

Is this an Eastern Banjo Frog?

[ I found this little guy in my orchid on the upstairs balcony. I live at Sanctuary Point which is on the south coast NSW