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Current Issue of PLoSBiology


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March 2026

Tunicates are the closest living relatives of vertebrates. Recent phylogenies place the little-studied, free-swimming thaliaceans—including salps—within sessile ascidians, highlighting a remarkable ecological transition. Historical reports hinted at a parallel developmental shift. Salp embryogenesis diverges from that of ascidians and involves unique maternal cells called calymmocytes. Lebel et al. provide foundational resources for two distantly related salp species, Salpa fusiformis and Thalia democratica. Using advanced microscopy, they generated developmental staging tables showing that while embryogenesis is stereotyped within species, it differs in cleavage patterns and blastomere positioning between them. They traced the origins of calymmocytes and confirmed their conserved role in separating blastomere clusters that form adult tissues. Apoptosis contributes to the progressive elimination of maternal calymmocytes. Finally, they show that calymmocytes express embryonic developmental regulators, suggesting co-option of an embryonic gene program. These findings provide an advanced framework for studying embryogenesis evolution in a previously underexplored chordate lineage. The image shows confocal microscopy of an embryo of Thalia democratica collected in the Bay of Villefranche-sur-Mer. Hoechst (blue); inverted transmitted light (magenta).

Image Credit: Marie Lebel

Essay

Behavioral convergence under urbanization: An overlooked dimension of biotic homogenization

Peter Mikula, Daniel T. Blumstein, Piotr Tryjanowski

Consensus View

Expanding invasive species impact assessments to the ecosystem level with EEICAT

Laís Carneiro, Daniel Pincheira-Donoso, Boris Leroy, Sandro Bertolino, Morelia Camacho-Cervantes, Ross N. Cuthbert, Alok Bang, Jane A. Catford, Josie South, Steven J. Cooke, Elena Angulo, Franck Courchamp

Unsolved Mystery

How does the cerebellum contribute to cognitive functions?

Jörn Diedrichsen, Samuel D. McDougle

Perspectives

Deep learning in biology faces a transferability crisis

Thomas A. O’Shea-Wheller, Katie I. Murray

Measures to strengthen international biosafety and biosecurity practices

Etienne Decroly, Patrick Berche, Ali Asy, Maggie L. Bartlett, Åsa Szekely Björndal, Christian Brechot, Patrick G. Casey, Patrick Couvreur, Maria J. Espona, Claudia Filippone, Diah Iskandriati, Wilmot James, Rafael Elias Marques, Zabta Khan Shinwari, Bernadett Pályi, Dana Perkins, Kathrin Summermatter, Olivier Vandenberg, Kurt Zatloukal, Jonathan Ewbank

Primers

Research Articles

Selection for growth drives the emergence of genetic heredity in protocells

Raquel Nunes Palmeira, Marco Colnaghi, Andrew Pomiankowski, Nick Lane

A bacterial ecocline in Klebsiella pneumoniae may explain its backboned phylogeny

Siqi Liu, Sarah L. Svensson, Daniel Falush

Sub-daily virus sampling at the Bermuda Atlantic Time Series reveals diel and depth-structured population dynamics without community-level shifts

Alfonso Carrillo, Emily Hageman, Lauren Chittick, Anna I. Mackey, Kimberley S. Ndlovu, Funing Tian, Naomi E. Gilbert, Daniel Muratore, Dean Vik, Gary R. LeCleir, Christine Sun, Ho B. Jang, Ricardo R. Pavan, Joshua S. Weitz, Steven W. Wilhelm, Matthew B. Sullivan

Social compatibility in opposite-sex prairie vole pairs is modulated by early-life sleep experience

Lezio S. Bueno-Junior, Noah E. P. Milman, Carolyn E. Jones-Tinsley, Anjesh Ghimire, Peyton T. Wickham, Yujia Hu, Bing Ye, Miranda M. Lim, Brendon O. Watson

Frontotemporal network interactions causally support rapid concreteness judgments during reading

Elliot Murphy, Oscar Woolnough, Cale W. Morse, Xavier Scherschligt, Nitin Tandon

Immersive NREM2 dreaming preserves subjective sleep depth against declining sleep pressure

Adriana Michalak, Davide Marzoli, Francesco Pietrogiacomi, Damiana Bergamo, Valentina Elce, Bianca Pedreschi, Giorgia Mosca, Alessandro Navari, Michele Emdin, Emiliano Ricciardi, Giacomo Handjaras, Giulio Bernardi

Dynamic expectation strength and precision shape human pain perception through shared and dissociable α-oscillatory mechanisms

Jia Li, Shihao Chen, Libo Zhang, Lingling Weng, Xinxin Lin, Yiheng Tu, Weiwei Peng

The retrieval of previously learned motor memories is facilitated by the reinstatement of default mode network manifold structures

Ali Rezaei, Corson N. Areshenkoff, Daniel J. Gale, Emily R. Oby, Jonathan Smallwood, J. Randall Flanagan, Jeffrey D. Wammes, Jason P. Gallivan

Pharmacological and non-pharmacological methods of inducing wakefulness activate distinct neural populations in the mouse brain

Renato Maciel, Justin Malcey, Kylian Gautier, Amarine Chancel, Blandine Duval, Théo Brunel, Patrice Fort, Claudio Marcos Queiroz, Pierre-Hervé Luppi

Prenatal and early postnatal periods differentially shape the maturation of human cortical microstructure and myelin

Thanos Tsigaras, Juergen Dukart, Stuart Oldham, Simon B. Eickhoff, Casey Paquola

Cortisol treatment impairs path integration and alters grid-like representations in the male human entorhinal cortex

Osman Akan, Varnan Chandreswaran, Henry D. Soldan, Anne Bierbrauer, Nikolai Axmacher, Oliver T. Wolf, Christian J. Merz

Thalamic reticular neurons provide cell type-specific modulation of sound processing in the auditory thalamus

Solymar Rolón-Martínez, Austin J. Mendoza, Christopher F. Angeloni, Nathan W. Vogler, Audrey C. Drotos, Mark Aizenberg, Ruoyi Chen, Kaylie Vu, Julie S. Haas, Maria N. Geffen

Behavioral engagement facilitates auditory neuron responses beyond their receptive fields

Chenggang Chen, Evan D. Remington, Xiaoqin Wang

A GABAergic network from AVP- to VIP-neurons in the suprachiasmatic nucleus sets the timing of circadian behavior rhythms

Yubo Peng, Yusuke Tsuno, Takashi Maejima, Mohan Wang, Jaehun Jung, Ayako Matsui, Michihiro Mieda

Ischemic stroke triggers brain-wide synaptic remodeling within four hours

Huanhuan Chen, Ye Wei, Luminiţa Ruje, Fusheng Du, Zhendong Feng, Qi Wan, Mikhail Spivakov, Oleg O. Glebov

Oligomeric lactic acid nanoplastics induce intrauterine growth restriction in mice by disrupting GATA2-mediated placental vascular development

Jia Lv, Mengjing Wang, Changzhi Shi, Yanwei Wang, Yihao Zhang, Chang Gao, Tian-Qi Bi, Jing Yang, Youdong Xu, Qunan Wang, Hua Wang, De-Xiang Xu, Mingliang Fang, Yichao Huang

Fine-tuning ERK activity enables proliferation-differentiation balance during lineage specification of human embryonic stem cells

Chenyang Ma, Weikang Meng, Jinghan Huang, Wanling Zheng, Xiao Xu, Tao Cheng, Zhengyi Li, Yang Liu, Hao Shen, Feng He, Alessandro Esposito, Pengfei Xu, Ashok Venkitaraman, Jun Ma, Heng Xu, Hongqing Liang

Gpc3 selectively suppresses subcutaneous adipogenesis in diet-induced obesity

Yan Li, Ming Tao, Carlos F. Ibáñez, Meng Xie

Cell cycle dynamics regulate H3K27 and H3K9 histone modifications in Drosophila

Liyne Nogay, Ananthakrishnan Vijayakumar Maya, Lara Heckmann, Francesco Cardamone, Isabelle Grass, Aakriti Singh, Anna Frey, Laurin Ernst, Nicola Iovino, Anne-Kathrin Classen

Disrupting CD22-cis-ligand interactions ameliorates type 1 diabetes and graft rejection by expanding regulatory B cells

Wang Long, Ayaka Endo, Hashadi Nadeesha Walakulu Gamage, Tianyi Yang, Toru Suzuki, Takeshi Nitta, Hiromu Takematsu, Kenya Honda, Masatake Asano, Takeshi Tsubata

Distinct Cdc42 protein levels differentially regulate polarized growth and cell fusion in Schizosaccharomyces pombe

Sajjita Saha, Aiswarya Sajeevan, Laura Merlini, Vincent Vincenzetti, Sophie G. Martin

Transposable elements contribute substantially to naturally occurring genetic lethality in Drosophila melanogaster

Sarah B. Marion, Katrina Focht, Iman Hamid, Edwin S. Iversen, Hannah John, Brenda Manzano-Winkler, Amber Navarra, Saniya Pangare, Mehrnaz Zarei, Mohamed A. F. Noor

Magnesium depletion by Candida albicans unleashes two unusual modes of colistin resistance in Pseudomonas aeruginosa with different fitness costs

Yu-Ying Phoebe Hsieh, Ian P. O’Keefe, Zeqi Wang, Wanting Sun, Hyojik Yang, Linda M. Vu, Nicole E. Smalley, Robert K. Ernst, Ajai A. Dandekar, Harmit S. Malik

Non-peptide dysbiosis metabolites reprogram a peptide quorum-sensing receptor to induce sustained predation in beneficial streptococci

Guillaume Cerckel, Denis Dereinne, Laura Ledesma-García, Vincent Meuric, Benoît Desguin, Johann Mignolet, Patrice Soumillion, Pascal Hols

Engineered romidepsin biosynthetic pathways in Escherichia coli Nissle 1917 improve the efficacy of bacteria-mediated cancer therapy

Chenghao Ma, Geng Li, Tao Sun, Ximi Tang, Tong Qiu, Jingwen Song, Hailong Wang, Youming Zhang, Tianyu Jiang

Systematic identification of Salmonella T6SS effectors uncovers diverse new families and lipid-targeting activities

Gianlucca G. Nicastro, Stephanie Sibinelli-Sousa, Julia T. Hespanhol, Thomas W. C. Santos, Joseph P. Munoz, Rosangela S. Santos, Blanca M. Perez-Sepulveda, Sayuri Miyamoto, L. Aravind, Robson F. de Souza, Ethel Bayer-Santos

Short Reports

Cis-regulatory evolution of Wnt family genes contributes to a morphological difference between silkworm species

Kenta Tomihara, Ana Pinharanda, Young Mi Kwon, Andrew M. Taverner, Laura S. Kors, Matthew L. Aardema, Julia C. Holder, Lin Poyraz, Takashi Kiuchi, Peter Andolfatto

Eye movements reflect memory-related theta activity in the human brain

Humza N. Zubair, Matthias Stangl, Uros Topalovic, Cory Inman, Martin Seeber, Sonja Hiller, Vikram R. Rao, Casey H. Halpern, Dawn Eliashiv, Itzhak Fried, Nanthia Suthana

Glutamatergic projections from the substantia nigra pars reticulata to the dorsal raphe nucleus regulate male social hierarchies

Yanzhu Fan, Shaoxiang Ge, Lidi Lu, Wenjun Niu, Zhiyue Wang, Xiaoguo Jiao, Guangzhan Fang

Curvature of the Drosophila corneal lens depends on localized chitin secretion

Neha Ghosh, Eva Rojo-Iost, Jessica E. Treisman

The adaptor protein TASL is required for age-related B cell emergence and lupus-like disease development in mice

Julia C. Johnstone, Robert Mitchell, Timothy J. Vyse, Alexander J. Clarke

Structures of the human glucose-6-phosphate transporter provide insights into its transport cycle and substrate recognition

Wanqin Zhang, Haizhan Jiao, Jingchuan Xue, Jiao Zhou, Yuye Wang, Qi Pan, Yuting Guo, Geshu Zhang, Hongli Hu, Xue Guo

Methods and Resources

A quantitative cell-based reporter links TDP-43 aggregation and dysfunction to define pathogenic mechanisms

Lohany Dias Mamede, Miwei Hu, Jaime Vaquer-Alicea, Amanda R. Titus, Patricia M. Passos, Erica Lantelme, Rachel L. French, Paige A. Kirschner, Marc I. Diamond, Timothy M. Miller, Yuna M. Ayala

Related Articles

Preregistered Research Article

Impacts of parental age and inbreeding on fitness in a wild insect

Tom Tregenza, Rolando Rodríguez-Muñoz, Alfredo F. Ojanguren, Paul Hopwood, Jelle J. Boonekamp

Discovery Reports

Translocation of bacteria from the gut to the brain in mice

Manoj Thapa, Anuradha Kumari, Chui-Yoke Chin, Jacob E. Choby, Elahe Akbari, Bikash Bogati, Fengzhi Jin, Elise Furr, Daniel M. Chopyk, Nitya Koduri, Andrew Pahnke, Theodore L. Burns, Elizabeth J. Elrod, Eileen M. Burd, David S. Weiss, Arash Grakoui

Evidence for genetically-based sperm discrimination in the vaginal tract of a primate species

Rachel M. Petersen, Lee (Emily) M. Nonnamaker, Jaclyn A. Anderson, Christina M. Bergey, Christian Roos, Amanda D. Melin, James P. Higham

Formal Comment

A responsible authorship culture is needed and it is a collective responsibility

Véronique Kiermer, Kirsten Bibbins-Domingo, Magdalena Skipper