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FIGURES 2–5 in New species of the genus Megalothorax Willem, 1900 (Collembola: Neelipleona) from a superficial subterranean habitat at Dobšinská Ice Cave, Slovakia

FIGURES 2–5. Megalothorax dobsinensis sp. n.: 2, head, dorsal side; 3, outer lobe of maxilla; 4, left mandibula; 5, ventral side of head with labium and connection of epicuticular channels with linea ventralis.

FIGURE 17 in New species of the genus Megalothorax Willem, 1900 (Collembola: Neelipleona) from a superficial subterranean habitat at Dobšinská Ice Cave, Slovakia

FIGURE 17. Megalothorax dobsinensis sp. n.: 17, diagram of ventral chaetotaxy of head and cuticular channels.

FIGURE 1. A in New species of the genus Megalothorax Willem, 1900 (Collembola: Neelipleona) from a superficial subterranean habitat at Dobšinská Ice Cave, Slovakia

FIGURE 1. A, Dobšinská Ice Cave, entrance: collapse doline (Photo: Ľ. Kováč); B, Dobšinská Ice Cave, cold site at the cave entrance: limestone scree covered by soil, leaves and pioneer vegetation, mostly mosses and liverworts (Photo: Ľ. Kováč); C, Harmanecká Cave, entrance morphology (Photo: Ľ. Kováč); D, Harmanecká Cave, Izbica Hall, twilight zone, limestone scree on the bottom partly covered with sediment, algae, cyanobacteria and mosses (Photo: P. Fenďa).

FIGURES 12–14 in New species of the genus Megalothorax Willem, 1900 (Collembola: Neelipleona) from a superficial subterranean habitat at Dobšinská Ice Cave, Slovakia

FIGURES 12–14. Megalothorax dobsinensis sp. n.: 12, part of the leg I; 13, part of the leg II; 14, part of the leg III.

FIGURES 10–11 in New species of the genus Megalothorax Willem, 1900 (Collembola: Neelipleona) from a superficial subterranean habitat at Dobšinská Ice Cave, Slovakia

FIGURES 10–11. Megalothorax dobsinensis sp. n.: 10, antenna, dorsal view (S-chaetae S2, S3 on Ant. III enlarged); 11, furca, posterior view.

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Supplementary material 1 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Detailed sampling data

Figure 27 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 27 Size-frequency histogram of free-living stages in samples of Mysidetes hanseni from ice caves of two Antarctic islands. 'Non-adults' comprise immature and subadult stages (definition in 'Methods').

Figure 25 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 25 Surface details of appendix masculina and its female homologue in series of increasing body size for Mysidetes illigi (A–C) and M. hanseni (D) from Antarctic ice caves. A immature male BL 12.1 mm B subadult male 14.7 mm C adult female 18.4 mm D adult male 24.7 mm.

Figure 5 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 5 Pseudomma kryotroglodytum sp. nov., holotype adult female BL 26.8 mm A labrum B labium C maxilla, caudal aspect D thoracopod 1 (caudal) with thoracic sternites 1, 2 (ventral) E detail of panel (D) showing dactylus 1 with nail F thoracic endopod 2, rostral G thoracic endopod 4, rostral H detail of panel (G) showing dactylus 4 with nail I inner face of oostegite 1, drawn above part of sympod 6. Scales omitted from objects A–D, F, G; setae from E, H.

Figure 28 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 28 Clutch size in relation to body size of incubating females of Mysidetes hanseni from Antarctic ice caves. Different symbols are given for unfertilised eggs (n = 1 brood), embryos (fertilised eggs; n = 14), and nauplioid larvae (n = 28). A significant linear regression was obtained and drawn only for nauplioid larvae.

Figure 22 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 22 Distance tree (Neighbour-Joining) of mitochondrial COI sequences of Mysidetes hanseni and Mysidetes illigi specimens collected in Antarctic ice caves at Curie and Damiers Islands, Dumont d'Urville Station, rooted with Antarctomysis maxima from the same area. Most relevant Bootstrap (1000 replicates) values are shown at nodes.

Figure 21 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 21 Phylogenetic placement of Pseudomma kryotroglodytum sp. nov. from Antarctic ice caves at Bernard Island, amongst the Pseudomma taxa available in DNA databases (GenBank accession numbers shown), based on 18S rDNA. The root is the ErythropiniHolmesiella affinis. Neighbour-Joining (NJ, shown here) and Maximum Likelihood (ML) reconstruction methods gave a similar topology. Bootstrap (1000 replicates) values, higher than 700, are shown at nodes (NJ/ML) in this order.

Figure 20 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 20 Nauplioid larva of Mysidetes hanseni from ice cave of Damiers Islands, Antarctica A larva at late substage N2, lateral B antennae and mouth field, ventral, lower-case labels indicate antennula (a1), antenna (a2), labrum (l) and mandibles (m) with palp (p) C tip of antennula D tip of abdomen with caudal furca, lateral. A, larva artificially separated from background; A–D are from four different specimens.

Figure 4 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 4 Pseudomma kryotroglodytum sp. nov., holotype adult female BL 26.8 mm (A, B, E, F) and paratype subadult female 21.5 mm (C, D). A right antennula, dorsal B antenna with antennal gland, ventral, setae omitted from antennal scale C eyeplate and carapace expanded on slide, short arrow points to distolateral edge of carapace, detail (D) pore group in pre-cardial position E mandibles with left palpus, caudal aspect F maxillula, caudal. Scales omitted from objects A–C, E, F but not from eyeplate in panel C; pore diameters not to scale in C, D.

Figure 2 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 2 Pseudomma kryotroglodytum sp. nov. from ice cave of Bernard Island, Antarctica A female holotype, lateral B cephalothorax of female holotype, dorsal C physical aspect of the ice cave environment A, B living specimen in laboratory.

Figure 26 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 26 Frequency distribution of free-living stages in samples of Mysidetes hanseni from ice caves of two Antarctic islands. Numbers of specimens are given for juveniles (J), immature (♂I), subadult (♂S) and adult (♂A) males, for immature (♀I), empty subadult (♀S–) and expectant subadult (♀S+) females and for adult females classified as incubating females bearing unfertilised eggs (♀U–), embryos (♀E–), nauplioid larvae (♀N–) and postnauplioid larvae (♀P), finally for non-incubating reproductive females (♀0+) and non-reproductive (spent) females (♀0–).

Figure 24 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 24 Pseudomma kryotroglodytum sp. nov., paratype subadult female BL 21.5 mm (A, B) and Dactylamblyops sp., adult female 21.8 mm (C, D); A ventrally orientated depression mid-dorsally on basal segment of right antennula, dorsal aspect B detail of panel (A), arrow points to striated pad on bottom of depression, dorsal C depression as in panel (A) for left antennula in another genus, lateral aspect, the short arrow points to mineral particles D detail of panel (C), the long arrow points to striated pad, lateral. A, antennular depression somewhat caudally tilted by the pressure exerted by the cover glass.

Figure 18 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 18 Cardiac portion of foregut in Mysidetes hanseni from ice cave of Curie Islands, Antarctica; pyloric parts removed. Adult female BL 23.4 mm. A foregut in slightly oblique lateral view, lower-case labels indicate dorsolateral infoldings (di), lateralia (la), mid-gut (mg), esophagus (oe), pigment bodies (pb), and storage space (sp) B spine from dorsolateral infoldings C spinose lobe of posterior part of lateralia D, E spines from anterior parts of lateralia.

Figure 29 from: Wittmann KJ, Chevaldonné P (2021) First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227. https://doi.org/10.3897/zookeys.1079.76412

Figure 29 Frequency distribution of incubating females with respect to marsupial stages and respective substages in samples of Mysidetes hanseni from ice caves of two Antarctic islands. Numbers of specimens are given for unfertilised eggs (E0), embryos (substages E1 to E6) and nauplioid larvae (N1 to N4); only zero counts for postnauplioid larvae (P1 to P3).