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crevicedwelling · 4 months

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I met some relatives of my beloved leatherleaf slugs in the mangroves of Singapore, the onch slugs! they’re perhaps some of the slowest-moving animals I’ve ever encountered; this is one in a hurry:

the species pictured is a Platevindex, which are particularly interesting to me since their backs are studded with extra eyes! the dorsal papillae each have a little black dot that’s a photoreceptor, which helps the slug detect changes in light exposure.

onchidiids are marine animals, living on costal rocks and in mangroves, but breathe air and spend much of their time out of the water. like the leatherleafs, they’ve got a dry, tough hide that maintains water balance, but Platevindex takes that to an extreme—when I picked one up, it felt like a vulcanized rubber tire!

#bugs #slug #onch slug #Gastropoda #systellommatophora

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taxonomytournament · 3 months

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Taxonomy Tournament: Gastropods

Stylommatophora. This order is made up of air-breathing land snails and slugs, including the garden snail, great grey slug, Roman snail and banana slug

Systellommatophora. This clade is made up of primitive air-breathing slugs, which may be marine or terrestrial

#animals #biology #polls #poll tournament #zoology #slugs #snails #gastropods #molluscs #spiralia #Stylommatophora #Systellommatophora #0x39v0xc6 #animal tournament #Animal Tournament Round 1

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animalids · 5 years

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Tropical leatherleaf slug (Eleutherocaulis alte)

Photo by Yuji Ohara

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sivaprasad · 3 years

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Belocaulus🐌🐛(గుల్ల లేకుండా నత్త వలె ఉండే జంతువు) . #Belocaulus #landslugs #terrestrial #pulmonate #gastropod #mollusks #Veronicellidae #slugs # Veronicelloidea # Systellommatophora #Gastropoda #Mollusca #Animalia #gastropod #natuerphotography #indianslug #natureisbeautiful #animals #smallanimal #zoology #biology #bioorga #microbiology #bioorganism (at Cherlapalli) https://www.instagram.com/p/CVQhs6cvzFf/?utm_medium=tumblr

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wonderoflandsnails · 4 years

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Florida Leatherleaf (Leidyula floridana)

While the vast majority of land slugs and snails that many people are familiar with are in the order Stylommatophora, leatherleaf slugs (and pancake slugs) are in a different order. The order they are in is the order Systellommatophora. There are some key differences between these groups. Gastropods in the order Stylommatophora have the ability to invert their tentacles (turn them inside out when they retract) and they also undergo a process called torsion when they are embryos. Torsion results in the internal organs of the slug/snail getting twisted around, resulting in the anus being near the head. Systellommatophora slugs instead have their anus in the conventional place at the end of the body and they also lack the ability to turn their tentacles inside out.   The Florida leatherleaf is a type of leatherleaf slug. These slugs are called leatherleaf slugs because they are leathery to the touch rather than slimy (an adaption that helps them avoid drying out). They also have a flattened appearance and the mantle runs the length of the body. Consequently, they look a bit like a leaf or a pancake.

Etsy | DeviantArt | Instagram

#slug #invertebrate #invert #exotic #Gastropod #my art

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nopizzaaftermidnight · 7 years

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"Systellommatophora Veronicelloidea Gastropod Adventures" 😂😂😂

Perfect!

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teadeoska · 6 years

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Systellommatophora sp

Chape. (babosa)

#systellommatophora #babosa #chape

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crevicedwelling · 1 year

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your slugs don't look like the slugs i'm used to, which just look like snails without shells. what's up with that? (i could google it but it's fun to ask questions)

it’s correct that most land slugs you see come from the same stock as the land snails you see! for the ease of language I will refer to all of these molluscs as “snails,” since a slug is just a snail whose shell has evolved to be absent or vestigial (leopard slug pictured has a tiny flat internal shell). there are even semi-slugs with a shell they can’t retract into! these snails all belong to the group Stylommatophora. I don’t really feel like going over all their distinctive traits, but I think most people are pretty familiar with these guys. there are a lot of them and they exist almost everywhere.

veronicellids like mine belong to the order Systellommatophora, a smaller group of snails that I believe evolved to live on land independently from the stylommatophorans. the two orders both make up the superorder Pulmonata, so they’re about as closely related as hedgehogs are to goats.

systellommatophorans comprise the semi-marine onch slugs, the veronicellid slugs, and the carnivorous rathouisiid slugs. all living systellommatophorans have no shells are are commonly called slugs.

however, a relic of their shelled past is still visible on their undersides:

see that little orifice on the right of their belly?

that’s the genital pore. since gastropods’ shells typically coil to the right, their anuses, sexual organs, and breathing holes typically are also always rightwards-oriented. veronicellids’ anuses are towards the tail end (bizarre for a once-shelled gastropod) but also are slightly to the right of center.

leatherleafs might be symmetrical from a top view, but their bellies hide evidence of a time when their ancestors had hard shells to coil up in!

#bugs #cw bugs #slugs #snails #taxonomy

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crevicedwelling · 1 year

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Do you have a post that lists all your creatures with their names, and species (or the common name of their species)?

I’ll make a List of Notable Individuals here! unlisted species exist in large colonies and are not names. most of these species have no common name, so I won’t use any.

ARACHNIDA

Amblypygi

Phrynus longipes - Stella

Phrynus whitei - Alfonso, Marco, Francisco, Marina, 20 nameless babies

Paraphrynus cubensis - Jeanne and Zero

Araneae - spiders

Aphonopelma chalcodes - Cassandra

Atypus karschi - Stapler

Scorpiones

Centruroides gracilis - Graciela, Gabriel

CHILOPODA

Scutigeromorpha - house centipedes

Scutigera coleoptrata - numbered. largest male is the “Old Moseley.” might give the others titles as well

Thereuonema tuberculata - numbered

Scolopendromorpha - giant or bark centipedes

Scolopendra hainanum - Mercédès

Scolopendra mutilans - Agatha

Scolopendra multidens - Élise

Scolopendra viridis

Ethmostigmus trigonopodus

Rhysida longipes

GASTROPODA

Systellommatophora - leatherleafs and allies

Leidyula sp. - Beeftongue

Sarasinula plebia - Bupkis, brood of ~30 buplets

PLATYHELMINTHES

Geoplanidae - terrestrial flatworms

Anisorhynchodemus sp. - The Worm

dumb creatures with bones

Eublepharis macularius - Victoria

#crevice #all my beasts

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animalids · 5 years

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Tropical leatherleaf slug (Eleutherocaulis alte)

Photo by Yuji Ohara

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