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ostracartderms · 1 year

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Acanthotelson stimpsoni, a syncarid crustacean from the Mazon Creek formation feeds on a dead Rhabdoderma coelacanth. In the background acanthodians and Bandringa are visible. Behind the coelacanth and syncarids there are rhacophyllum plants and horsetail stems.

#syncarid #crustacean #paleoart #mazon creek #coelacanth #Acanthotelson #Rhabdoderma #fish #skeleton #cw animal death #palaeoart #syncaridae #syncarida

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dykegeology · 1 year

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Watercolour of syncarids from On the Anaspidacea, Living and Fossil, 1909

Anaspides tasmaniae

Paranaspides lacustris

Liverwort Yungermannia with 2 Anaspides tasmaniae eggs

#Anaspides #syncarida #syncaridea #syncarid #crustacean #art #scientific illustration #sciart #biological illustration #watercolour #(at least I think it's watercolour)#animals #(usually don't use this many tags but you know. I've got to spread the syncarid art image)#vintage art #liverwort #Paranaspides #Anaspides tasmaniae #Paranaspides lacustris

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kathleenseiber · 3 years

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Blind shrimps, translucent snails

By Jenny Davis, Charles Darwin University; Daryl Nielsen, CSIRO; Gavin Rees, CSIRO, and Stefanie Oberprieler, Charles Darwin University

There aren’t many parts of the world where you can discover a completely new assemblage of living creatures. But after sampling underground water in a remote, arid region of northern Australia, we discovered at least 11, and probably more, new species of stygofauna.

Stygofauna are invertebrates that have evolved exclusively in underground water. A life in complete darkness means these animals are often blind, beautifully translucent and often extremely localised – rarely living anywhere else but the patch they’re found in.

The species we discovered live in a region earmarked for fracking by the Northern Territory and federal government. As with any mining activity, it’s important future gas extraction doesn’t harm groundwater habitats or the water that sustains them.

Our findings, published today, show the importance of conducting comprehensive environmental assessments before extraction projects begin. These assessments are especially critical in Australia’s north, where many plants and animals living in surface and groundwater have not yet been documented.

When the going gets tough, go underground

Stygofauna were first discovered in Western Australia in 1991. Since then, these underground, aquatic organisms have been recorded across the continent. Today, more than 400 Australian species have been formally recognised by scientists.

The subterranean fauna we collected from NT aquifers, including a range of species unknown to science. A–C: Atyid shrimps, including Parisia unguis; D-F: Amphipods in Melitidae family; G: The syncarid species Brevisomabathynella sp.; H-J: members of the Candonidae family of ostracods; K: the harpacticoid species Nitokra lacustris; L: a new species of snail in the Caenogastropoda: M-N: Members of the Cyclopidae family of copepods; O: The worm species Aeolosoma sp. GISERA, Author provided

Stygofauna are the ultimate climate change refugees. They would have inhabited surface water when inland Australia was much wetter. But as the continent started drying around 14 million years ago, they moved underground to the relatively stable environmental conditions of subterranean aquifers.

Today, stygofauna help maintain the integrity of groundwater food webs. They mostly graze on fungal and microbial films created by organic material leaching from the surface.

A thriving stygofauna ecosystem lies beneath the surface of northern Australia’s arid outback. We sampled water through bores to measure their presence. Credit: Jenny Davis, Author provided

In 2018, the final report of an independent inquiry called for a critical knowledge gap regarding groundwater to be filled, to ensure fracking could be done safely in the Northern Territory. We wanted to determine where stygofauna and microbial assemblages occurred, and in what numbers.

Our project started in 2019, when we carried out a pilot survey of groundwater wells (bores) in the Beetaloo Sub-basin and Roper River region. The Beetaloo Sub-basin is potentially one of the most important areas for shale gas in Australia.

What we found

The stygofauna we found range in size from centimetres to millimetres and include:

two new species of ostracod: small crustaceans enclosed within mussel-like shells

a new species of amphipod: this crustacean acts as a natural vacuum cleaner, feeding on decomposing material

multiple new species of copepods: tiny crustaceans which form a major component of the zooplankton in marine and freshwater systems

a new syncarid: another crustacean entirely restricted to groundwater habitats

a new snail and a new worm.

These species were living in groundwater 400 to 900 kilometres south of Darwin. We found them mostly in limestone karst habitats, which contain many channels and underground caverns.

Perhaps most exciting, we also found a relatively large, colourless, blind shrimp (Parisia unguis) previously known only from the Cutta Cutta caves near Katherine. This shrimp is an “apex” predator, feeding on other stygofauna — a rare find for these kinds of ecosystems.

A microscopic image of Parisia unguis, a freshwater shrimp. Credit: Stefanie Oberprieler, Author provided

Protecting groundwater and the animals that live there

The Beetaloo Sub-basin in located beneath a major freshwater resource, the Cambrian Limestone Aquifer. It supplies water for domestic use, cattle stations and horticulture.

Surface water in this dry region is scarce, and it’s important natural gas development does not harm groundwater.

The Beetaloo Basin is part of the federal government’s gas expansion strategy. Credit: Department of Industry, Science, Energy and Resources

The stygofauna we found are not the first to potentially be affected by a resource project. Stygofauna have also been found at the Yeelirrie uranium mine in Western Australia, approved by the federal government in 2019. More research will be required to understand risks to the stygofauna we found at the NT site.

The discovery of these new NT species has implications for all extractive industries affecting groundwater. It shows the importance of thorough assessment and monitoring before work begins, to ensure damage to groundwater and associated ecosystems is detected and mitigated.

Where to from here

Groundwater is vital to inland Australia. Underground ecosystems must be protected – and not considered “out of sight, out of mind”.

Our study provides the direction to reduce risks to stygofauna, ensuring their ecosystems and groundwater quality is maintained.

Comprehensive environmental surveys are needed to properly document the distribution of these underground assemblages. The new stygofauna we found must also be formally recognised as a new species in science, and their DNA sequence established to support monitoring programs.

Different species of copepods from various parts of the world. Credit: Andrei Savitsky/Wikimedia, CC BY-SA

Many new tools and approaches are available to support environmental assessment, monitoring and management of resource extraction projects. These include remote sensing and molecular analyses.

Deploying the necessary tools and methods will help ensure development in northern Australia is sustainable. It will also inform efforts to protect groundwater habitats and stygofauna across the continent.

Jenny Davis, Professor, Research Institute for Environment & Livelihoods, Charles Darwin University, Charles Darwin University; Daryl Nielsen, Principal Research Scientist, CSIRO; Gavin Rees, Principal Research Scientist, CSIRO, and Stefanie Oberprieler, Research associate, Charles Darwin University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Blind shrimps, translucent snails published first on https://triviaqaweb.weebly.com/

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dykegeology · 1 year

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Love cave creature compilation images

#all the more reason to google syncarid. the results that aren't syncarids are other great creatures

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dykegeology · 1 year

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THERE'S A SYNCARID THAT LIVES IN STREAMS KIND OF NEAR MY CITY

#reading syncarid papers and apparently one of the cave genuses has a non cave species that was just. swimming around in a creek.#kept seeing sites saying 'syncarids live in caves and alpine pools in tasmania' but um a mainland one I don't have to go cave diving to see #haha yes.#I have like 4 weeks of holidays left surely that's enough time to.

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dykegeology · 1 year

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If syncarida has million number of fans I am one of them. If syncarida has ten fans I am one of them. If syncarida has only one fan and that is me. If syncarida has no fans, that means I am no longer on earth

#'cave diving is a bad idea' umm haha but what if there is a syncarid

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dykegeology · 1 year

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Fabric paint I love you

#about to start the syncarids shirt

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dykegeology · 1 year

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Annoys me so much that creatures are viewed as having to be 'useful' in some way for it to, you know, be bad to wipe out their species entirely. Like beloved (judgmental) have you considered the inherent value of biodiversity.

#like maybe syncarids do nothing but have you considered that um they're amazing and we should all love them

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dykegeology · 1 year

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As soon as I get polls I'm going to make an unusual malacostracan subclasses one.