Science AI Journal
Earth and Planetary Sciences · Research topic

Open research questions in Subterranean biodiversity and taxonomy

69 gap statements mined from Subterranean biodiversity and taxonomy papers in our 4.5M-paper local library, which holds 401 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

Choosing where to publish on Subterranean biodiversity and taxonomy? See the ranked Earth Science journals.

What the literature leaves open

  • This strongly suggests that further undescribed taxa remain to be discovered.

    Descriptions of two new species and a new record of the giant pill-millipede genus Zephronia Gray, 1832 from Thailand (Diplopoda, Sphaerotheriida, Zephroniidae) · 2026 · DOI

  • The lack of understanding of the dynamical interaction between guano biomass density, invertebrate biomass density, and fish biomass density in cave ecosystems. The need to develop a model that represents the nutrient-based cave ecosystem.

    Dynamical Analysis of a Trophic Model on Guano, Invertebrates, and Fish in Cave Ecosystems · 2026 · DOI

  • The lack of knowledge on the diagnostic features of the Cyprettadopsini. The need for an update of the distinguishing features and a key to the genera of the Cyprettadopsini.

    Three new species of Cyprettadopsini of subfamily Cypridopsinae (Crustacea: Ostracoda) from Northeast Thailand with discussion on characters in the tribe · 2026 · DOI

  • The current classification of Laelaps is based on conserved morphological characters, which may not reflect evolutionary history. There is a lack of molecular evidence for the monophyly and cosmopolitan status of Laelaps.

    Molecular evidence of rodent-associated mites tests the monophyly and challenges the cosmopolitan status of Laelaps Koch, 1836 (Mesostigmata: Laelapidae) · 2026 · DOI

  • The previous publication contained errors that needed to be corrected. The corrections are necessary for the accurate identification of Geophilus species.

    Corrigendum: Popovici G, Popa OP, Iorgu EI (2026) Integrative taxonomy uncovers hidden diversity in Romanian Geophilus Leach, 1814 (Geophilomorpha, Geophilidae). Zoosystematics and Evolution 102(2): 533–555. https://doi.org/10.3897/zse.102.177928 · 2026 · DOI

  • The need for further research on the ecology and conservation of cave-adapted ground beetles.

    A new species of the subterranean genus Zhijinaphaenops Uéno, 2002, from a Karst Cave in Guizhou, China (Coleoptera: Carabidae: Trechini) · 2026 · DOI

  • The lack of knowledge on the diversity of subterranean fauna. The need for further research on cave-adapted ground beetles. The gap in the understanding of the subterranean genus Zhijinaphaenops.

    A new species of the subterranean genus Zhijinaphaenops Uéno, 2002, from a Karst Cave in Guizhou, China (Coleoptera: Carabidae: Trechini) · 2026 · DOI

  • To account for this unexpectedly high species richness in the Serra de Iuiú region, we propose three non-mutually exclusive hypotheses which, although preliminary, provide plausible explanations and warrant further investigation: (i) the presence of geographic barriers; (ii) limited dispersal capacity; and (iii) competitive exclusion.

    Remarkable micro-endemism and high congeneric richness: eight new cave-restricted species of Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the Brazilian semi-arid. · 2026 · DOI

  • The need to rely on DNA sequence data to confirm the identity of specimens. The potential threat to the populations of the new species due to climate change and human activities such as the planned hydropower dam.

    Two new Cochlostoma species from the Durmitor and Komarnica regions of northern Montenegro (Caenogastropoda, Cochlostomatidae) · 2026 · DOI

  • The lack of recent collections and verified in situ observations. The difficulty of studying mesophotic ecosystems. The need for further research on the phylogeny of Syngnathidae.

    Australyichthys gen. nov. (Teleostei, Syngnathidae), a lost mesophotic lineage from southern Australia, with description of A. aegis sp. nov. and reclassification of Hippocampus minotaur and H. paradoxus · 2026 · DOI

  • The study is limited by the small number of specimens available. The lack of recent collections and verified in situ observations limits the understanding of the genus. The study is based on incidental collections and may not be representative of the entire genus.

    Australyichthys gen. nov. (Teleostei, Syngnathidae), a lost mesophotic lineage from southern Australia, with description of A. aegis sp. nov. and reclassification of Hippocampus minotaur and H. paradoxus · 2026 · DOI

  • Opilio is represented by eight species in Russia, whereas in the available literature there is no data on representatives of this genus in Kyrgyzstan.

    New data on Opilio Herbst, 1798 (Opiliones, Phalangiidae) from Russia and Kyrgyzstan · 2026 · DOI

  • The study aims to address the Wallacean shortfall within the Azorean subterranean ecosystem. The paper highlights the need for conservation efforts to protect the unique and vulnerable species found in the Azores.

    Insights from the Dalberto Teixeira Pombo (DTP) Arthropod Collection – I. Revealing the Hidden Diversity of Terrestrial Cave Arthropods in the Azores · 2025 · DOI

  • Collected primarily during intensive field expeditions between 1991 and 2010, subterranean samples from the archipelago’s diverse cave systems and mesovoid habitats form a vast assemblage of specimens — most of which remain unidentified — that illuminate the region’s hidden and understudied biodiversity.

    Insights from the Dalberto Teixeira Pombo (DTP) Arthropod Collection – I. Revealing the Hidden Diversity of Terrestrial Cave Arthropods in the Azores · 2025 · DOI

  • Despite this reputation, relatively little is known of the early evolution of the group, with only two species described from the Ordovician and a subsequent 80-million-year gap in their fossil record until xiphosurids appear in the Late Devonian.

    The first Silurian horseshoe crab reveals details of the xiphosuran ground plan · 2025 · DOI

  • The paper does not explicitly state a research gap, but it highlights the importance of conservation and the need to protect caves and their inhabitants.

    Animal Life in Caves · 1971 · DOI

  • The need to identify and describe new species of algae. The lack of molecular and morphological data for some species.

    Molecular and morphological systematic investigation of Chondrophycus minutus sp. nov. (Ceramiales, Rhodophyta) from India · 2026 · DOI

  • The family Scirtidae has been studied from the perspective of taxonomy and specific ecological traits, but its emergence patterns and environmental drivers have been poorly studied.

    The Emergence of the Family Scirtidae (Insecta: Coleoptera) in Lotic Karst Habitats: A Case Study over 15 Years · 2024 · DOI

  • The authors note that genes with altered expression in cave Astyanax populations show evidence of standing genetic variation (rare variants present in ancestral surface populations).

    Cavefishes · 2018 · DOI

  • The traditional teaching methods can be boring and rather pointless. The use of real data and statistical experiments is not commonly used in teaching statistics.

    Do Bristlebacks Cluster? · 1979 · DOI

  • Further investigation of the sensitivity of the ecosystem stability toward changes in predation efficiency. Application of the model to other ecosystems with similar characteristics. Experimental validation of the model's predictions.

    Dynamical Analysis of a Trophic Model on Guano, Invertebrates, and Fish in Cave Ecosystems · 2026 · DOI

  • Additional molecular data and comprehensive phylogenetic studies to reassess the circumscription and evolutionary relationships of Pararamichloridiales. Further exploration of the diversity and classification of aquatic fungi.

    Hyalosympodium gen. et sp. nov. (Pararamichloridiales, Diaporthomycetidae) from freshwater habitats in Guizhou, China · 2026 · DOI

  • After 2000, intensive research of the pools and trickles revealed an abundance of aquatic fauna, resulting in the description of four new species of Copepoda and two not yet determined epibiotic protozoans.

    Cave Size Doesn’t Matter but Persistence and Sampling Techniques Do—Rich Cave-Dwelling Fauna Revealed in the Epikarstic Velika Pasica Cave (Slovenia, Europe) · 2026 · DOI

  • The study of cavefishes is challenging due to their unique environment, - The genetic basis of cavefish traits is complex and not fully understood, - The development of new experimental approaches is needed to address the limitations of current…

    Cavefishes · 2018 · DOI

  • The latter comprised specimens from two localities, one in Cambodia (type locality) and the other in Vietnam, corresponding to distinct but sister MOTUs as delimited by all six delimitation methods, except mPTP.

    An updated phylogeny of the family Stenasellidae (Crustacea, Isopoda), with a new species of Stenasellus from southern Vietnam · 2026 · DOI

Most-cited papers in Subterranean biodiversity and taxonomy

Most recent work

Find a gap in your own Subterranean biodiversity and taxonomy sub-topic

This page shows what the Subterranean biodiversity and taxonomy literature already flags as unresolved. To narrow it to your specific question, search the Research Gap Finder: the search is free with a free account and lists the papers closest to your topic first. Unlocking that topic (50 credits, charged once) fills the comparison table from our 4.5M-paper local library and writes the gaps from its rows.

Open the Research Gap Finder →

Related topics in Earth and Planetary Sciences

Atmospheric chemistry and aerosols
689 open questions
Marine and coastal ecosystems
481 open questions
Oceanographic and Atmospheric Processes
390 open questions
Archaeology and ancient environmental studies
377 open questions
Marine and coastal plant biology
318 open questions
Cryospheric studies and observations
316 open questions
Geology and Paleoclimatology Research
283 open questions
Climate change and permafrost
262 open questions
Open questions raised by papers listed on this page include: (1) This strongly suggests that further undescribed taxa remain to be discovered (“Descriptions of two new species and a new record of the giant pill-millipede…”, 2026); (2) The lack of understanding of the dynamical interaction between guano biomass density, invertebrate biomass density, and fish biomass density in cave ecosystems (“Dynamical Analysis of a Trophic Model on Guano, Invertebrates, and Fish in Cave…”, 2026); (3) The lack of knowledge on the diagnostic features of the Cyprettadopsini (“Three new species of Cyprettadopsini of subfamily Cypridopsinae (Crustacea:…”, 2026); (4) There is a lack of molecular evidence for the monophyly and cosmopolitan status of Laelaps (“Molecular evidence of rodent-associated mites tests the monophyly and…”, 2026); (5) The lack of knowledge on the diversity of subterranean fauna (“A new species of the subterranean genus Zhijinaphaenops Uéno, 2002, from a…”, 2026). 69 gap statements have been mined from Subterranean biodiversity and taxonomy papers in our 4.5M-paper local library, which holds 401 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

Tools for your next paper

Gaps & Literature SearchFind open questions in any field — 120,000+ open gaps mined from our own library.Pre-CheckIs your paper ready? Acceptance odds for top, mid and open/emerging journals, in seconds.Journal FinderA ranked shortlist of target journals from a 17,500-venue index.Duplicate Publication CheckerCheck for prior publication across 7 sources and our local library.Citation GeneratorFreeA DOI or title → APA, MLA, Vancouver, Chicago, BibTeX, RIS. No signup.Graphical Abstract MakerFreeTurn your findings into a colorblind-safe graphical abstract.

How Pre-Check worksHow AI Review works

Compare the category — Honest roundups of the AI research tools, ours listed alongside the alternatives.

Command palette

Jump anywhere, run any action.