The Groundbreaking Discovery of Latrunculia atkinsonae

In a remarkable advancement for South African marine science, researchers have formally described a new sponge species, Latrunculia (Latrunculia) atkinsonae, named in tribute to Dr. Lara Atkinson, a dedicated biodiversity scientist at the National Research Foundation-South African Environmental Observation Network (NRF-SAEON) Egagasini Node. This discovery, part of a comprehensive study published in January 2026 in the Journal of the Marine Biological Association of the United Kingdom, uncovers hidden diversity in the Namaqua ecoregion along South Africa's west coast. The study not only introduces this new species but also three others, highlighting the untapped richness of the Benguela Current Large Marine Ecosystem (BCLME).

The naming honors Dr. Atkinson's 15 years of pioneering work in offshore benthic research—benthic referring to organisms living on the ocean floor—and marine taxonomy, the science of classifying species. Her efforts in monitoring invertebrate bycatch from Department of Forestry, Fisheries and the Environment (DFFE) demersal research trawl surveys have been instrumental. Demersal trawls target bottom-dwelling fish, often capturing sponges as unintended bycatch, which scientists like Atkinson analyze to build biodiversity inventories.

Lead researchers Dr. Toufiek Samaai from DFFE's Oceans and Coasts unit and Dr. Robyn Payne from Anchor Environmental Consultants spearheaded the effort, collaborating with Blessing Kamwi. Their work combined traditional morphological analysis—examining physical structures like spicules, the silica skeletons of sponges—with modern DNA barcoding using cytochrome c oxidase subunit I (COI) and 28S ribosomal RNA genes. This integrated approach confirmed the species' novelty, revealing cryptic diversity in heavily trawled areas.

Dr. Lara Atkinson's Trailblazing Contributions to Marine Science

Dr. Lara Atkinson stands as a key figure in South Africa's marine research landscape. As an offshore biodiversity scientist at NRF-SAEON's Egagasini Node, based in Cape Town, she focuses on deep-sea and shelf ecosystems. Her career includes leading explorations like the OceanX and OceanQuest expeditions around Africa, diving in submersibles to 500 meters at Walters Shoal seamount, and advocating for women in STEM.

A research associate at the University of Cape Town's (UCT) Department of Biological Sciences, Atkinson bridges government research with higher education. Her projects involve partnerships with UCT, South African National Biodiversity Institute (SANBI), and the deep-sea trawl industry. She has contributed to field guides on offshore marine invertebrates and emphasized the need for sustained monitoring amid a shortage of marine taxonomists in South Africa.

"We know there are many species still waiting to be discovered, highlighting the necessity of ongoing monitoring," Atkinson noted. Her work exemplifies how dedicated researchers drive biodiversity knowledge, inspiring students pursuing marine biology degrees at South African universities like UCT, Stellenbosch, and Nelson Mandela University.

Unpacking the Scientific Paper: Methods and Findings

The paper, titled "Revealing hidden diversity: new Latrunculia and Iophon species (Porifera, Demospongiae, Poecilosclerida) from the continental shelf of the Namaqua ecoregion," details four new species: two in the genus Latrunculia (L. namaquaensis and L. atkinsonae) and two Iophon species. It also documents a northward range extension for Latrunculia (Aciculatrunculia) biformis.

Specimens were collected from 2009–2024 surveys using the research vessel FRS Africana for trawls and DP Star for Van Veen grabs, at depths of 50–500 meters on the continental shelf. Preservation in 96% ethanol allowed spicule preparation via acid dissolution, examined under light and scanning electron microscopes. DNA extraction, PCR amplification, and phylogenetic analysis using RAxML confirmed taxonomy.

• Holotype of L. atkinsonae: Collected at 29.3620°S, 16.5312°E, 133 m depth on soft sediment.
• Spicule measurements: Anisostyles 410 (384–432) × 10 (8–11) μm; anisodiscorhabds 47 (43–48) × 29 μm.
• Molecular divergence: 0.5% COI from L. namaquaensis, nested in Latrunculiidae clade.

Type specimens are deposited at Iziko South African Museum, ensuring accessibility for future studies.

Physical Characteristics of Latrunculia atkinsonae

Latrunculia atkinsonae is a medium-sized, semi-hemispherical sponge measuring about 35 × 25 × 12 mm. In preservative, it appears dark chocolate brown with a smooth, undulating surface featuring minute areolate porefields (0.5 mm) for water intake and volcano-shaped oscules (1 mm) for expulsion. Its choanosome—the functional tissue—forms a dense polygonal-meshed reticulation of anisostyles, principal spicules with one blunt and one pointed end.

Distinctive anisodiscorhabds feature a shallow bowl-shaped apical whorl with short, vertical spines, sometimes bifurcated, setting it apart from relatives like L. namaquaensis (blunt finger-shaped spines). This morphology, combined with genetic data, establishes its uniqueness. Sponges like this thrive in mesophotic zones (30–150 m), where light penetrates but trawling impacts persist.

Holotype images and scanning electron micrographs in the paper illustrate these traits, aiding taxonomists worldwide.

Habitat in the Namaqua Ecoregion and Benguela Ecosystem

The Namaqua ecoregion, spanning South Africa's northwest coast within the Benguela Current system, is defined by cold, nutrient-rich upwelling waters driving high productivity. This western boundary current, flowing northwards from 34°S to 15°S, supports diverse benthic communities despite intense trawling since the 1890s.

L. atkinsonae inhabits unconsolidated soft sediments at 133 m, a rariphotic (150–300 m) to mesophotic transition. The ecoregion now boasts 80 known sponge species, up from 76, comprising 4% of global diversity (South Africa total ~374). Benguela's 173 Poecilosclerida species underscore its hotspot status.

Upwelling fuels plankton blooms, sustaining filter-feeders like sponges. However, bottom trawling disrupts habitats, making discoveries like this vital for assessing resilience.

Ecological Role and Biodiversity Significance of Sponges

Sponges (Phylum Porifera) are foundational to marine ecosystems, filtering vast water volumes—up to 100,000 liters daily per large specimen—cycling nutrients and hosting symbionts. In Benguela, they stabilize sediments, provide microhabitats, and contribute to carbon sequestration.

This discovery boosts South Africa's marine inventory, critical for the National Biodiversity Assessment. It reveals cryptic speciation in trawled zones, informing Marine Protected Areas (MPAs) and Ecosystem-Based Management. Dr. Samaai warns of taxonomist shortages: "Without such expertise, we cannot accurately represent our rich biodiversity."

• Benefits: Water quality improvement, biodiversity support.
• Risks: Trawling, climate change-induced upwelling shifts.

Bioprospecting Potential: Bioactive Treasures from Latrunculia

Latrunculiidae sponges produce pyrroloiminoquinone alkaloids like discorhabdins and makaluvamines, with cytotoxic, antimicrobial, and anti-cancer properties. South African species, including Tsitsikamma and Latrunculia bellae, have yielded compounds in bioprospecting programs.

L. atkinsonae may harbor novel variants, fueling pharmaceutical research. Collaborations between NRF, universities, and industry exemplify sustainable bioprospecting under the Nagoya Protocol. For aspiring researchers, this opens doors in natural products chemistry at institutions like UCT's Marine Research Institute.

Explore research jobs in bioactive marine compounds or visit career advice for academia.

Challenges in South African Marine Taxonomy and Solutions

South Africa grapples with a dearth of trained taxonomists, hindering biodiversity documentation. Only a handful specialize in Porifera, despite 12,000+ marine species. Initiatives like SAEON's monitoring and SAIAB workshops address this through capacity building.

• Solutions: University programs in taxonomy, DNA barcoding labs, international partnerships.
• Case: Ocean Census workshops at SAIAB processed Comoros specimens in 2026.

Government funding via NRF and DFFE supports postdocs and students. Check postdoc opportunities in marine science.

NRF-SAEON's Pivotal Role and University Partnerships

NRF-SAEON, with seven nodes, drives long-term environmental observation. Egagasini Node monitors Agulhas and Benguela margins, partnering with UCT, Stellenbosch, and Rhodes universities. Dr. Atkinson's UCT affiliation exemplifies this synergy, training MSc/PhD students in benthic ecology.

SAPRI (Southern African Program on Research and Innovation) hosted by SAEON fosters ocean modeling. These links position South African higher ed as a hub for marine research careers.

Discover university jobs in South Africa at AcademicJobs ZA.

Photo by Het Suthar on Unsplash

Future Outlook: Conservation, Research, and Careers

This discovery signals more to come, with seamount explorations and AI-aided taxonomy on horizons. Conservation implications include expanding MPAs in Namaqua, protecting against trawling and warming.

For students, marine biology programs at CPUT, UKZN, and UCT offer pathways. Careers span research assistants to professors, with demand for taxonomists rising. NRF funding supports scholarships, while rate my professor helps choose mentors.

Engage further via higher ed jobs, career advice, and university positions. The L. atkinsonae story inspires a new generation to dive into South Africa's ocean sciences.