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| Váldodahkkit: | , , , , , , , , , , , , |
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| Materiálatiipa: | Recurso digital |
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Zenodo
2025
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| Fáttát: | |
| Liŋkkat: | https://doi.org/10.5281/zenodo.17007755 |
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Sisdoallologahallan:
- <p><b><i>Megatestis</i> Donnellan, Mahony & Richards, gen. nov.</b></p><p><b>(Fig. 22)</b></p><p><i>ZooBank</i> <i>LSID: urn:lsid:zoobank.org:act: F90744D2-FE44-49F8- 8765-81A1D77F863D Type species:</i> <i>Chiroleptes dahlii</i> Boulenger, 1896.</p><p><i>Content:</i> One species— <i>Megatestis dahlii</i> * (Boulenger, 1896) comb. nov.</p><p><i>Diagnosis: Megatestis</i> can be diagnosed from the sister taxon <i>Leptobatrachus</i> by medium vs. long legs, undeveloped vs. expanded finger discs, and the reduced state of the m. palmaris longus vs. a multi-divided state; from <i>Cyclorana</i> by fully vs. minimal toe webbing, small vs. large inner metatarsal tubercles, presence vs. absence (in 13 of 14 species of <i>Cyclorana</i>) of intercalary structures, and by defined vs. non-defined call duration. Refer to Tables 1 and 2.</p><p><i>Distribution and ecology:</i> Semi-aquatic frogs that breed in large permanent waterbodies in grasslands and savannah forest in northern Australia.</p><p><i>Etymology:</i> From the Greek μέγᾰ́ς (<i>megas</i>, large, mighty, marvellous) and Latin <i>testis</i> (the organ, itself based on the Latin noun meaning witness, in reference to the Roman legal system which permitted only males to testify; Field and Harrison 1968), referring to the spectacularly large testis to body mass ratio exhibited by this species, among the largest in the animal kingdom. The gender is masculine.</p><p><i>Remarks: Megatestis</i> was included in the <i>Litoria aurea</i> Group of Tyler and Davies (1978). Males of <i>Megatestis</i> can have one of the largest relative testis masses of any animal, with values of 7.3–12.6% (Donnellan <i>et al</i>., unpublished data). While our data are not in accord with published values, 0.102% for <i>M. dahlii</i> in Byrne <i>et al</i>. (2002), in the absence of specimen voucher numbers in Byrne <i>et al</i>. (2002) we are unable to evaluate the reasons for the different observations. Currently monotypic but molecular genetic analyses indicate that <i>Megatestis dahlii</i> is a species complex (Donnellan and Mahony unpublished data).</p>