Strange Days Indeed

Variable Reed Snake (Calamaria lumbricoidea), family Colubridae, Malaysia

Above: Fastosarion brazieri, commonly known as the chameleon semi-slug, and an unidentified species of semi-slug from the genus Sheldonia

The term "semi-slug" is used to describe an intermediate stage of evolution as snails evolve into slugs. Nearly 1,000 different species of semi-slugs are known to exist, and these bizarre little creatures can be found on at least four continents.

Above: Fastosarion brazieri and Varadia amboliensis

Each species of semi-slug is technically still classified as a snail, but its shell is noticeably reduced, becoming more internalized as the species evolves. A semi-slug officially becomes a regular-slug once its shell is no longer visible at all.

As this article explains:

If life were simple, there would be snails and slugs. Snails carry their homes on their backs; slugs are naked and embarrassed. But life isn’t simple, so of course there’s secret option #3 – the semi-slug, a bizarre creature that sits exactly between the snail and the slug.

Above: genus Satiella and genus Euaustenia

This article also adds:

In contrast to snails that have an external shell large enough to accommodate the body, or slugs in which the shell is completely internal or absent, semi-slugs have an external shell, but the shell is too small to accommodate the animal’s entire body.

Above: Megaustenia siamensis

This process is known as limacization, and it's especially common in moist, low-calcium environments where a snail's shell may be more of a burden than a benefit:

Terrestrial slugs are not a monophyletic group, but a case of convergent evolution in which the slug form evolved from different lineages of land snails that gradually lost their shell through a process called limacization. Limacization resulted in adaptive radiation in land snail lineages, as slugs became adapted to diverse moist and protected spaces, such as crevices in rocks and wood debris. The loss of the shell also allowed for more movement and less calcium dependence, making slugs more successful as pests.

Above: Gaeotis nigrolineata, also known as the Puerto Rican semi-slug, has a neon green shell that is almost completely internalized, but the shell is clearly visible through the semi-slug's translucent body

Some semi-slugs have shells that are still opaque and largely visible, with the mantle (a patch of flesh) covering only the outer edges of the shell, while others have shells that are more significantly reduced, transparent, and/or concealed.

Above: Ibycus rachelae, commonly known as the green-shelled semi-slug, and a species of semi-slug from the genus Durgella

This topic was mentioned in my previous post about Ibycus rachelae, but I wanted to write a more detailed post about semi-slugs, because they're just so fascinating and weird.

Above: a black-and-white semi-slug from subfamily Sheldoniinae

Above: Fastosarion brazieri again, but this one is especially spiky for some reason

Sources & More Info:

Australian Geographic: Meet the Semi-Slug, a Snail without a Home

Carnegie Museum of Natural History: What's So Good about Being a Slug?

Frontiers: Terrestrial Slugs in Neotropical Agroecosystems (PDF)

iNaturalist: Photos 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, & 12

The Shell-Makers (Introducing Molluscs): On Becoming Sluggish

Land Snails and Slugs of Sabah and Labuan, Malaysia: Semi-Slugs

Earless Monitor Lizard (Lanthanotus borneensis), family Lanthanotidae, endemic to Borneo

ENDANGERED.

Semi-aquatic.

Closely related to the true monitor lizards in the family Varanidae.

The only member of its family.

They do have inner ears, and are capable of hearing, despite the lack of ear openings and tympana.

Have you ever seen a tufted pygmy squirrel (Exilisciurus whiteheadi)? Found only in Borneo’s mountain forests—at elevations of more than 3,280.8 ft (1,000 m)—this tiny critter is one of the world’s smallest squirrels. It grows up to 3.4 in (8.6 cm) long. And at about 0.8 oz (22.7 g), adults typically weigh less than half a stick of butter! Easily recognizable thanks to its ear tufts, this species feeds primarily on moss and lichens.

Sun Glassfrog or Atrato Glassfrog (Hyalinobatrachium aureoguttatum), male with eggs on the underside of a leaf, family Centrolenidae, Colombia

She played bass on 10,000 songs, including the most-played track of the twentieth century. She was paid $55 per session. Her name never appeared on the albums.

Gold Star Studios, Los Angeles, 1964. A woman in a cardigan walks past the receptionist, a Fender Precision bass in her hand like a briefcase. She doesn’t sign autographs. She signs a timesheet.

Her name is Carol Kaye. In three hours, she will record what will become the most-played track of the twentieth century. She’ll pocket fifty-five dollars and head to another studio, on the other side of town, for the next session.

The record label will never put her name on the album.

Between 1957 and 1973, Carol Kaye took part in roughly 10,000 recording sessions. Not as the featured artist, not as a guest, but as a hired hand. She was part of an anonymous collective nicknamed The Wrecking Crew—elite studio musicians who actually played the instruments on your favorite records while the famous bands posed for promotional photos.

The work was relentless. Three albums before the day was over. Stale coffee in paper cups. No rehearsal. The charts arrived minutes before the tape rolled. If you couldn’t read a chart and nail the take in two tries, you didn’t get called for the next session.

Carol could do it on the first try.

She started playing guitar in grimy bars at fourteen because her family couldn’t pay the electric bill. Music wasn’t a romantic dream for her. It was survival. It was a job—factory work with better acoustics and lower pay.

But she was faster and sharper than almost everyone else. She corrected charts in pencil while the producer was still explaining what he wanted. In one session in 1968, she told a famous producer his arrangement sounded like a dying dog. She chose her own line. They kept her version.

That descending bass line that drives the Beach Boys’ “Wouldn’t It Be Nice”? Carol Kaye. The propulsive groove of “These Boots Are Made for Walkin’”? Carol Kaye. The acoustic-guitar intro to “La Bamba”? Carol Kaye. The iconic theme from Mission: Impossible? Carol Kaye.

She invented techniques on the spot, out of sheer necessity. When the bass sound was too muddy for AM radio, she stuck felt under the strings and used a hard pick instead of her fingers. The tone cut through the static like a blade. It became the sonic signature that defined 1960s pop.

Bassists spent years—decades—trying to crack the secret of the Beach Boys’ gear to get that sound. They were studying the wrong people. They should have been studying Carol.

She received no royalties. No residuals. No gold-record ceremony. No credit on the album sleeves. When “You’ve Lost That Lovin’ Feelin’” hit number one, Carol was already back in a studio cutting a soap jingle.

The biggest bands mimed her bass lines on TV variety shows. New York marketing departments decided a mom in classic clothes didn’t fit the rebellious-youth image they were selling. So they simply left her name off the album credits.

For thirty years, almost no one cared. The truth only began to surface in the late 1990s, when music researchers found the same union contract numbers on thousands of hit records. The very documents meant to preserve studio musicians’ anonymity betrayed them.

Think about it. Every time you heard “Good Vibrations,” “River Deep – Mountain High,” the Righteous Brothers, Nancy Sinatra, or Sonny and Cher, you were hearing Carol Kaye. She composed the soundtrack of an entire generation’s youth.

And yet the records still say nothing. She’s now over eighty. She wrote instructional books. She trained countless bassists. She is finally starting to be recognized by music historians who uncovered the truth about The Wrecking Crew.

But she never got what she deserved: her name on those albums. Credit for the music that defined an era. Recognition that those bass lines everyone associates with the “Beach Boys” were, in fact, Carol Kaye’s.

Fifty-five dollars a session. Ten thousand sessions. The most-played track of the twentieth century.

Malayan Slug-Snake (Asthenodipsas malaccanus), family Pareidae, Yala, Thailand

Schaefer's Spiny-jawed Snake (Xenophidion schaeferi), family Xenophidiidae, central highlands mountain range of Peninsular Malaysia

This individual is only the 7th ever documented.

First described in 1995.

The species is endemic to Malaysia.

Black Ice and White Knuckles: Braving the Elements on Iceland’s Ring Road - Jeff Östberg , 2022.

Swedish , b. 1988 -