Image dataset: Type series of the new crab-associated leech species<i> Paraclepsis dongnaiensis</i> Bolotov, Eliseeva & Kondakov, 2025 from Vietnam (Hirudinida: Glossiphoniidae)

This dataset contains raw (uncorrected) photos of selected type specimens of the new crab-associated leech species Paraclepsis dongnaiensis Bolotov, Eliseeva & Kondakov, 2025 (Hirudinida: Glossiphoniidae). This species is described in our paper entitled “Arthropod-associated leeches (Annelida: Hirudinida) of the World: Diversity, taxonomic reappraisal, ecological classification of host associations, and convergent evolution” (Ecologica Montenegrina 89: 38-87 (2025); https://doi.org/10.37828/em.2025.89.3). The specimens are deposited in the Hirudinida collection of the RMBH—Russian Museum of Biodiversity Hotspots, N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Arkhangelsk, Russia. Type specimen photos (RMBH; by Tatyana A. Eliseeva and Alexander V. Kropotin) D = dorsal view; V = ventral view (1) Holotype RMBH Hir-1190-H (intact specimen; fixed in 96 % ethanol) labeled “VIETNAM: Cát Tiên National Park, 11.4369°N, 107.4230°E, altitude 130 m, Đồng Nai River basin, Đồng Nai Province, temporary forest pools, on the carapace of freshwater crab Somanniathelphusa triangularis Đăng & Ðỗ, 2005 (Decapoda: Gecarcinucidae), October 2024, Ivan N. Marin leg.” Image files (n = 4): - dorsal view of the holotype [RMBH Hir-1190-H holotype D.jpg]; - ventral view of the holotype [RMBH Hir-1190-H holotype V.jpg]; - dorsal view of the anterior part of the holotype [RMBH Hir-1190-H holotype head D.jpg]; - ventral view of the anterior part of the holotype [RMBH Hir-1190-H holotype head V.jpg]. (2) Paratype RMBH Hir-1190-1 (intact specimen; fixed in 96 % ethanol) from the type locality. Image files (n = 3): - dorsal view of the paratype [RMBH Hir-1190-1 paratype D.jpg]; - ventral view of the paratype [RMBH Hir-1190-1 paratype V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190-1 paratype head D.jpg]. (3) Paratype RMBH Hir-1190-2 (intact specimen; fixed in 96 % ethanol) from the type locality. Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1190-2 paratype D.jpg]; - ventral view of the paratype [RMBH Hir-1190-2 paratype V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190-2 paratype head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190-2 paratype head V.jpg]. (4) Paratype RMBH Hir-1190-3 (intact specimen; fixed in 96 % ethanol) from the type locality. Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1190-3 paratype D.jpg]; - ventral view of the paratype [RMBH Hir-1190-3 paratype V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190-3 paratype head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190-3 paratype head V.jpg]. (5) Paratype RMBH Hir-1190 Dissected-1 (dissected specimen; fixed in 96 % ethanol) from the type locality. Image files (n = 2): - dorsal view of the paratype [RMBH Hir-1190 paratype Dissected-1 D.jpg]; - ventral view of the paratype [RMBH Hir-1190 paratype Dissected-1 V.jpg]. Note: Dissection of this specimen was unsuccessful because its crop is filled with blood that hampers the preparation of H&E slices. (6) Paratype RMBH Hir-1190 Dissected-2 (dissected specimen; fixed in 96 % ethanol) from the type locality. Image files (n = 13): - dorsal view of the paratype [RMBH Hir-1190 paratype Dissected-2 D.jpg]; - ventral view of the paratype [RMBH Hir-1190 paratype Dissected-2 V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190 paratype Dissected-2 head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190 paratype Dissected-2 head V.jpg]; - H&E stained longitudinal slices of the paratype: slice 1 to slice 5 from ventral to dorsal direction [RMBH Hir-1190 paratype Dissected-2 - slice_1.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_2.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_3.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_4.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_5.jpg]; - Processed images of the H&E stained longitudinal slices of the paratype: slice 1 – 3 – 5 from ventral to dorsal direction [RMBH Hir-1190 paratype Dissected-2 - slice_1 PROC.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_3 PROC.jpg; RMBH Hir-1190 paratype Dissected-2 - slice_5 PROC.jpg]; - General scheme of the digestive and generative systems based on the series of longitudinal slices [RMBH Hir-1190 paratype Dissected-2 - scheme.jpg]. (7) Paratype RMBH Hir-1190 DNA-1 (this specimen is partly used for DNA and iDNA extraction; fixed in 96 % ethanol) from the type locality. Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1190 paratype DNA-1 D.jpg]; - ventral view of the paratype [RMBH Hir-1190 paratype DNA-1 V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-1 head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-1 head V.jpg]. (8) Paratype RMBH Hir-1190 DNA-2 (this specimen is partly used for DNA and iDNA extraction; fixed in 96 % ethanol) from the type locality. Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1190 paratype DNA-2 D.jpg]; - ventral view of the paratype [RMBH Hir-1190 paratype DNA-2 V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-2 head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-2 head V.jpg]. (9) Paratype RMBH Hir-1190 DNA-3 (this specimen is partly used for DNA and iDNA extraction; fixed in 96 % ethanol) from the type locality. Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1190 paratype DNA-3 D.jpg]; - ventral view of the paratype [RMBH Hir-1190 paratype DNA-3 V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-3 head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1190 paratype DNA-3 head V.jpg]. (10) Paratype RMBH Hir-1137-1 (this specimen is partly used for DNA and iDNA extraction; fixed in 96 % ethanol) labeled “VIETNAM: underside large stones in spring at the entrance of a mountain massif, 3.5 km SW of Tri Tôn city, 10.3959°N, 104.9828°E, altitude 38 m, Tri Tôn Rural District, An Giang Province, Mekong Delta Region, 11 November 2023, Dmitry M. Palatov leg.” Image files (n = 4): - dorsal view of the paratype [RMBH Hir-1137-1 paratype D.jpg]; - ventral view of the paratype [RMBH Hir-1137-1 paratype V.jpg]; - dorsal view of the anterior part of the paratype [RMBH Hir-1137-1 paratype head D.jpg]; - ventral view of the anterior part of the paratype [RMBH Hir-1137-1 paratype head V.jpg]. (11) Paratype RMBH Hir-1137-2 (intact specimen; fixed in 96 % ethanol) labeled “VIETNAM: underside large stones in spring at the entrance of a mountain massif, 3.5 km SW of Tri Tôn city, 10.3959°N, 104.9828°E, altitude 38 m, Tri Tôn Rural District, An Giang Province, Mekong Delta Region, 11 November 2023, Dmitry M. Palatov leg.” Image files (n = 2): - dorsal view of the paratype [RMBH Hir-1137-2 paratype D.jpg]; - ventral view of the paratype [RMBH Hir-1137-2 paratype V.jpg].