SDG 17 : Build Partnerships for the Goals
“Papua holds the greatest diversity of freshwater crayfish in the world, yet many species remain scientifically undescribed,” said Rury Eprilurahman.
“Our goal is to help establish a valid taxonomic foundation while promoting the protection of these increasingly vulnerable species,” he added.
New Species from Papua’s Hidden Rivers
The seven newly described species originate from various remote regions of West Papua:
- Cherax veritas — Misool Island, Raja Ampat
- Cherax arguni and Cherax kaimana — northern Kaimana district
- Cherax nigli — southern Kaimana
- Cherax bomberai — Fakfak
- Cherax farhadii and Cherax doberai — Teluk Bintuni region
“These species can be clearly distinguished from each other, both morphologically and genetically,” the researchers wrote in their publication.
DNA Reveals Unique Lineages
To further validate their discoveries, the team performed mitochondrial DNA analyses using the 16S rRNA gene fragment.
Results revealed that the seven new species represent genetically distinct lineages, supporting their classification as separate species.
“This is crucial, as some species may look deceptively similar. Without molecular analysis, we risk misinterpreting their evolutionary relationships,” Eprilurahman explained.
By combining classical morphology with molecular systematics, the researchers ensured a scientifically sound and responsible approach to species identification.
Aquarium Trade as a Starting Point
Intriguingly, some of the initial specimens were obtained through the aquarium trade.
“Many of these species first appeared in the aquarium hobby market in Europe or Jakarta,” Rury noted.
“From there, we traced their origins and collaborated with local contacts in Papua to confirm the natural habitats.”
While not ideal, the aquarium trade occasionally provides an early clue to the existence of undescribed species.
Nevertheless, Rury emphasized that all field sampling and data collection were conducted ethically and following conservation permits.
Vital for Conservation Efforts
This discovery is significant not only for taxonomy but also for conservation.
West Papua is a global hotspot for freshwater biodiversity, yet its ecosystems face mounting threats from deforestation, mining activities, infrastructure development, and illegal wildlife trade.
By enhancing the region’s species inventory, the findings will contribute to more targeted and effective conservation planning.
“If we don’t even know which species are present, how can we protect them?” Rury asked.
“With this knowledge, we can push for more sustainable management of freshwater habitats.”
Much More Yet to Be Discovered
While seven new species have now been formally described, the researchers believe Papua’s Cherax diversity is still vastly underexplored.
“Papua is incredibly vast. There are countless rivers, lakes, and cave systems that remain unexplored,” Rury said.
“I’m confident we will continue to discover new species in the future.”
The same team has previously described other species, including:
- Cherax warsamsonicus (2017)
- Cherax alyciae and Cherax mosessalossa (2018)
- Cherax wagenknechtae (2022)
- Cherax rayko and Cherax phing (2024)
This highlights Papua’s status as a global hotspot for freshwater crayfish diversity.
Continuing the Legacy of Holthuis
Since Holthuis pioneered the study of the world’s freshwater crayfish in the mid-20th century, modern tools like Next Generation Sequencing (NGS) and advances in molecular systematics now offer unprecedented insights.
But fieldwork remains irreplaceable.
“There is no substitute for direct exploration in nature,” Rury emphasized.
“Papua still holds many mysteries, and we have only scratched the surface.”
Through a combination of field exploration, global collaboration, and rigorous science, today’s researchers — following in the footsteps of L.B. Holthuis — continue to unveil new chapters in our understanding of Indonesia’s extraordinary freshwater biodiversity.
Reference:
Lukhaup C., Eprilurahman R., von Rintelen T. (2025). Seven New Species of Crayfish of the Genus Cherax (Crustacea, Decapoda, Parastacidae) from Western New Guinea, Indonesia Arthropoda 3(2):10. https://www.mdpi.com/2813-3323/3/2/10
Authors:
Ardaning Nuriliani, Chelsy Ammara Septiani, Syifa Aneira, Meinawa Amaliah, Nimas Ayu Pramesthi, Muhammad Fathin Setya Daffa
[Yogyakarta, 16 May 2025] – Faculty of Biology, Universitas Gadjah Mada (UGM), officially launched Lustrum XIV celebration alongside the commemoration of its 70th Anniversary. The opening was enlivened by a Fun Walk, enthusiastically participated in by lecturers, administrative staff, members of the Biology chapter of the Dharma Wanita Persatuan, and student representatives—all of whom are integral parts of the Faculty’s long and meaningful journey. Carrying the theme “Biology for Environment and Humanity,” the celebration marks the beginning of a series of events for the 2025 Lustrum XIV. This activity aims not only to celebrate the Faculty’s achievements but also to foster unity and optimism as it looks toward the future with renewed spirit.
The event began with an energetic morning aerobics session led by a professional instructor, joyfully joined by all participants. In this meaningful moment, Prof. Dr. Budi Setiadi Daryono, M.Agr.Sc., Dean of the Faculty of Biology UGM, delivered an opening speech. He expressed gratitude for the Faculty’s outstanding accomplishments over the past 70 years, while also inspiring all participants with a forward-looking vision to continue advancing the field of biology and contributing to society and the nation. The opening prayer was then led by Tyas Ikhsan Hikmawan, S.Si., M.S., Ph.D., invoking blessings and success for the entire Lustrum XIV series, and for the continued prosperity of the Faculty of Biology UGM community.
The symbolic opening of Lustrum XIV was marked by a ribbon-cutting ceremony conducted by Dean, Prof. Dr. Endang Semiarti, M.S., M.Sc. (Chair of the Academic Senate), Ganies Riza Aristya, S.Si., M.Sc., Ph.D. (Chair of the 2025 Lustrum XIV Committee), and Dr. Dwi Sendi Priyono, S.Si., M.Si. (Chair of the Opening Ceremony). This symbolic act represented more than a formal gesture—it signified the start of a new chapter in the Faculty’s history, full of innovation and dedication. The ribbon cutting was followed by the Fun Walk, which took place around the UGM campus area. This moment of togetherness was captured with a group photo in front of Balairung UGM. After the joyful walk, participants enjoyed a relaxed and friendly atmosphere over delicious refreshments, creating a warm and lively gathering. The festivity continued with live musical performances by the Dean, faculty members, and staff, enriching the sense of unity and celebration. This opening event of Lustrum XIV also reflects the Faculty’s active contribution to several Sustainable Development Goals (SDGs): SDG 3 (Good Health and Well-being): by encouraging an active and healthy lifestyle, improving participants’ physical and mental health, and promoting awareness of the importance of physical activity in daily life; SDG 4 (Quality Education): as part of a higher education institution, the event reinforces educational values and builds a strong sense of academic community; and SDG 17 (Partnerships for the Goals): through collaboration among the academic community, alumni, partners, and the broader public, the Faculty demonstrates its commitment to advancing shared goals, including sustainable development. As a joyful finale to the event, a door prize drawing session was held—one of the most anticipated parts of the day. Cheers and laughter erupted with each number called, adding excitement and delightful surprises for the participants. Let us continue to nurture life with freshness and vitality, providing space to grow and innovate—Biology for Environment and Humanity.
This event supports several Sustainable Development Goals (SDGs), including:
SDG 4: Quality Education, by facilitating knowledge exchange with international experts.
SDG 14: Life Below Water, through awareness and education on marine biodiversity protection.
SDG 17: Partnerships for the Goals, by fostering international academic collaborations.