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Figs 1–3. Helophorus auricollis. 1 in New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands
Figs 1–3. Helophorus auricollis. 1 – male genitalia, dorsal view; 2, 3 – habitat on the Bering Island (floodplain of Buyan River).
Fig. 8–10 in New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands
Fig. 8–10. Habitat of Ochthebius yoshitomii on the Commander Islands. 8 – Toporkov Island (coast of Pacific Ocean); 9, 10 – Bering Island (Vkhodnoy Rif cape, coast of Pacific Ocean).
FIGURE 16 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 16. Scatter plot of PC2 vs. PC1 of body outlines of larvae of Haliplidae and the new fossils. The differentiated stages are all representatives of Haliplus. Note how tightly together the fossils cluster, indicating a very similar overall shape. This is different for the larvae of the extant forms that show quite some variation, especially over ontogeny.
FIGURE 15 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 15. Scatter plot of head length over total length of larvae of Haliplidae and the new fossils. The differentiated stages are all representatives of Haliplus. Note the possible three stages of the fossils: a single one on the lower left might represent a stage 1 larva; those clustering in the middle might represent stage 2 larvae, the single fossil far up right might represent a stage 3 larva.
FIGURE 13. Fossil larva BUB 1222. A. Overview ventral side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 13. Fossil larva BUB 1222. A. Overview ventral side. B. Colour-marked version of A. C. Dorsal side. D. Close-up on head. E. Close-up trunk end. F. Close-up on leg; arrow points to claw. Abbreviations: ad = abdomen; at = antenna; fe = femur; hc = head capsule; ms = mesothorax; mt = metathorax; pl = palp; pt = prothorax.
FIGURE 17 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 17. Scatter plot of PC1 versus total length of larvae of Haliplidae and the new fossils. The differentiated stages are all representatives of Haliplus. Note that modern day stage 1 and 2 larvae plot away from the smaller fossils, with a single exception. For the fossils, the outline seems to be very similar, independent of the size.
FIGURE 11. Fossil larva BUB 4436, specimen 9. A. Overview dorsal side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 11. Fossil larva BUB 4436, specimen 9. A. Overview dorsal side. B. Colour-marked version of A. C. Ventral side. D. Close-up trunk end. E. Close-up on head. F. Close-up on thorax. Abbreviations: ad = abdomen; at = antenna; fe = femur; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax.
FIGURE 10. Fossil larva BUB 4436, specimen 8. A. Overview ventral side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 10. Fossil larva BUB 4436, specimen 8. A. Overview ventral side. B. Colour-marked version of C. C. Dorsal side. D. Close-up on head. E. Close-up trunk end. F. Close-up on leg. G. Close-up on tergites. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax.
FIGURE 12. Fossil larvae BUB 4436, specimens 10 and 11. A–F. Specimen 10. A. Overview dorsal side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 12. Fossil larvae BUB 4436, specimens 10 and 11. A–F. Specimen 10. A. Overview dorsal side. B. Colourmarked version of A. C. Ventral side. D. Close-up on head. E. Close-up trunk end. F. Close-up on leg. G–K. Specimen 11. G. Overview ventral side. H. Colour-marked version of G. I. Dorsal side. J. Close-up on head. K. Close-up on trunk end. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax; th = thorax; ti = tibia.
FIGURE 5. Fossil larva BUB 4436, specimen 2. A in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 5. Fossil larva BUB 4436, specimen 2. A. Overview on lateral side. B. Colour-marked version of A. C. Other side. D. Close-up on trunk end. E. Close-up on thorax. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax.
FIGURE 6. Fossil larva BUB 4436, specimen 3. A. Overview dorsal side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 6. Fossil larva BUB 4436, specimen 3. A. Overview dorsal side. B. Colour-marked version of B. C. Ventral side. D. Close-up on anterior region in ventral view. E. Close-up on head. F. Close-up on very terminal end. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax; te = trunk end.
FIGURE 1 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 1. Simplified drawings of larvae of Haliplus and Brychius, stage 3 larvae or larvae of unknown stage, based on various sources. A–N. Haliplus. A. H. confinis, Böving and Craighead (1931). B. Peterson (1957). C–I. Stage 3 larvae. C–F. Vondel (2012). C. H. halsei. D. H. pilbaraensis. E. H. fortescueensis. F. Haliplus pinderi. G–H. Vondel (2004). G. H. testudo. H. H. timmsi. I. H. variomaculatus, Vondel (2011b). J. Spangler (1991). K–N. Stage 3 larvae. K. H. laminatus, Vondel (1986). L. H. varius, Vondel (1996). M. H. subseriatus, Vondel (2001). N. H. kamiyai, Watanabe and Yamasaki (2020). O. Haliplus variegatus, stage 3 larva, Vondel (1997). P. Brychius elevatus, Bertrand (1933).
FIGURE 8. Fossil larva BUB 4436, specimen 5. A. Overview ventral side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 8. Fossil larva BUB 4436, specimen 5. A. Overview ventral side. B. Colour-marked version of B. C. Dorsal side. D. Close-up on head. E. Close-up on leg. F. Terminal end in different contrasting to highlight setae. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; th = thorax.
FIGURE 7. Fossil larva BUB 4436, specimen 4. A. Overview dorsal side. B in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 7. Fossil larva BUB 4436, specimen 4. A. Overview dorsal side. B. Colour-marked version of B. C. Ventral side. D. Close-up on trunk end. E. Close-up on head. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; pt = prothorax; te = trunk end.
FIGURE 3 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 3. Simplified drawings of larvae of Peltodytes, based on various sources. A. P. caesus, stage 3 larva, Vondel (2011b). B. Spangler (1991).
FIGURE 4. Fossil larvae BUB 4436, specimens 1 and 6. A–D. Specimen 1. A in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 4. Fossil larvae BUB 4436, specimens 1 and 6. A–D. Specimen 1. A. View on one side. B. Colour-marked version of A. C. View on other side. D. Very terminal end, with different contrasting to highlight the setae. E–G. Specimen 6. E. Overview. F. Colour-marked version of E. G. Close-up on very terminal end. Abbreviations: ad = abdomen; at = antenna; hc = head capsule; ms = mesothorax; mt = metathorax; pt = prothorax; te = trunk end.
FIGURE 2 in An overview of crawling water beetle larvae and a first possible record from 100-million-years-old Myanmar amber
FIGURE 2. Simplified drawings of larvae of Haliplus, partially representing ontogenetic sequences, based on various sources. A–D. Vondel (2011a). A, B. H. abbreviatus or H. maculatus. A. Stage 1 larva. B. Stage 2 larva. C, D. Stage 3 larvae. C. H. maculatus. D. H. abbreviatus. E–G. H. lineatocollis, Bertrand (1933). E. Stage 1 larva. F. Stage 2 larva. G. Stage 3 larva. H–J. H. apicalis. H, I. Vondel (1997). H. Stage 1 larva. I. Stage 2 larva. J. Stage 3 larva, Vondel (1995). K, L. Stage 1 larvae. K. H. indistinctus, Michat et al. (2020). L. H. halsei, Vondel (2012). M. H. fulvus, Klausnitzer (1978).
Fig. 2. Oreodytes mongolicus Brinck, 1943 in Endemic and sub-endemic water beetles of Mongolia and their distribution ranges
Fig. 2. Oreodytes mongolicus Brinck, 1943. Photos by Enkhnasan. a. Dorsal habitus, male, b. Head and pronotum, c. Adeagus, laterial view.
Fig. 9 in Endemic and sub-endemic water beetles of Mongolia and their distribution ranges
Fig. 9. Endemic and sub-endemic species richness in the nine subbasins of Mongolia included in this study. SRB-Selenge River Basin; ShRB-Shishkhed River Basin; GRB-Gobi River Basin.
Fig. 4. Ochthebius mongolicus Janssens, 1967 in Endemic and sub-endemic water beetles of Mongolia and their distribution ranges
Fig. 4. Ochthebius mongolicus Janssens, 1967. Photos by Tamás Németh and Aranka Grabant. a. Dorsal habitus, male, b. Head and pronotum, c. Aedeagus, dorsal view, d. Labels for lectotype.
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