Tag: smaragdinus

#DidYouAnole – Anolis smaragdinus

On July 16, 2020

Photo by: Jake Scott

Howdy y’all!

This week we’re going green again with probably one of the best anole names ever (next to apletophallus maybe). It is the trunk-crown anole, Anolis smaragdinus, the Bahamian Green anole.

Quick side note: It appears that some of the authors on this site (Jonathan), disagree about how awesome the name is.

Now it’s name translates to “emerald” from Latin, which is entirely fitting because it is a gorgeous green anole, with a GREEN (sometimes yellow-green) belly. Please forgive me for the gratuitous pictures of smaragdinus. I love a good green anole.

Photo by: Cleo Falvey

Species coexistence in landscapes of fear | Nature Research ...

Like all its cousins it can change that green to drab brown, but it’s face is a bit more pointy and it has a red-orange or deep peach colored dewlap.

Photo by: Emily Powell

And as the name implies, this lizard is from and is endemic to The Bahamas.

There are two recognised subspecies, A. s. smaragdinus and A. s. lerneri. The main differences between them being an axillary (“armpit”) spot that A. s. smaragdinus has, and occasional chin spotting, and then their size. Anolis s. lerneri males are larger, with an SVL of up to 64mm and have a pointier head.

Photo by: Cleo Falvey

The Bahamian Green anole was observed in a study by Dr. Losos and colleagues where they were introduced to a small uninhabited islet that is occasionally (due to the tide) connected to a larger one by a strip of rock. These trunk-crown anoles are rarely found on the ground, but when Dr. Losos and his colleagues returned to the islet, the lizards had dispersed to and colonised the larger islet. This is a really interesting note because arboreal anoles aren’t often, if at all, observed going to ground and traveling to colonise such vegetation.

Bonus! Here’s a very yellow smaragdinus found by James T. Stroud and some more posts about this anole!

James T. Stroud on Twitter: "Bahamian green anole (Anolis ...

Anole Eyespots

By Jerry Husak

On June 22, 2011

In Natural History Observations

Anoles have served as great model organisms in studies of adaptive radiation and how form and function are molded by selection, but they have also been the center-piece for some of the most interesting (and classic) research on how the brain modulates aggression to determine dominance. For example, work by Cliff Summers and his laboratory (among others) over the years has provided great detail concerning how adrenal catecholamines and glucocorticoids, produced during “stressful” aggressive interactions, interact with serotonergic activity in the hippocampus to determine social rank. These neuroendocrine processes are outwardly expressed, in a sense, by the familiar eyespot seen prominently during male green anole (Anolis carolinensis) interactions. The formation of the eyespot is stimulated by catecholamines, and the latency of eyespot formation is dependent on serotonergic activity, which is influenced by glucocorticoid secretion. Males that develop the eyespot sooner tend to be dominant, and once eyespots have appeared in one combatant, aggression in the rival tends to be inhibited. At least that’s the way it seems to work in A. carolinensis.

Return to Staniel Cay

By Jonathan Losos

On May 21, 2011

In Notes from the Field

Staniel Cay is one of the quaint Caribbean backwaters, populated by yachtsmen, expats, scalawags, locals and…scientists. For more than 30 years, Tom Schoener, David Spiller and associates have worked here, producing a series of textbook studies on food web ecology (most recently here).

Having finished our work in Marsh Harbour, we have relocated to Staniel, marking a return for me after a 19 year absence. As our plane wended its way down the Exuma

: Headin’ south down the Exumas.

chain, the memories of my previous visits and their results came flooding back. While a graduate student in the 80’s, I read Schoener and Schoener’s 1983 Nature paper reporting the results of introductions of brown anoles (A. sagrei) to very small islands (approx. the size of a baseball diamond) around Staniel Cay. S&S, noting that islands of this size do not normally harbor anoles, decided to introduce lizards to watch the populations wither away, and thus learn something about the process of extinction. But to their surprise, the populations did not go quietly into the night. Instead, they thrived and some downright exploded in numbers, one island going from 10 introduced lizards to 98 the next year.