Candonopsis tenuis (Brady, 1886)
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publication ID |
https://doi.org/ 10.1080/00222930802361030 |
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persistent identifier |
https://treatment.plazi.org/id/6530807D-EC00-FF8D-AF9B-FEB2FD4FFC42 |
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treatment provided by |
Carolina |
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scientific name |
Candonopsis tenuis (Brady, 1886) |
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Candonopsis tenuis (Brady, 1886)
( Figures 26C,D View Figure 26 and 24 View Figure 24 )
Candonopsis tenuis comb. nov.: Sars, 1896
Remarks
The Japanese specimens very closely match the redescription of C. tenuis from Australia provided by Karanovic and Marmonier (2002). Two small differences include the absence of a spine on the Ga claw of the UR (present in the Australian specimens) and a slightly more projecting b lobe on the Hp (not so prominent in the Australian specimens). Candonopsis sumatrana Klie, 1932 has a reduced spine on the Ga claw, and so in this respect is most similar to the Japanese specimens. However, although the taxonomy of the genus Candonopsis has relied heavily on the presence or absence of the spines on the UR claws, Karanovic and Marmonier (2002) highlighted that the spines are not a stable feature and can vary within a species. Furthermore, C. tenuis has a more elongate female carapace with a less strongly arched dorsal margin than C. sumatrana , although in the latter the curvature of the dorsal margin seems variable.
Previously, one representative of this genus was reported in Japan, Candonopsis kingsleii (Brady and Robertson, 1870) by Okubo (2004) in ponds and rice fields. Candonopsis kingsleii has a very similar carapace shape in lateral view to C. tenuis , but in dorsal view the former is more pointed towards the anterior. Other differences include a shorter L7 h2 seta in C. kingsleii and slight differences in the appearances of the male L5 and Hp as well as a UR lacking spines on both claws.
In Lake Biwa C. tenuis was found in the littoral zone of the Karasuma Hanto, especially in very shallow, muddy habitats along the lakeshore down to a depth of 0.5 m. Localities 81 and 84 in Figure 1 View Figure 1 .
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