সংরক্ষণ করুন:
| প্রধান লেখক: | |
|---|---|
| বিন্যাস: | Recurso digital |
| ভাষা: | |
| প্রকাশিত: |
Zenodo
2018
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| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | https://doi.org/10.5281/zenodo.3818766 |
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সূচিপত্রের সারণি:
- <p><b>Genus <i>Hunyadiscus</i> Páll-Gergely, 2016</b></p><p><i>Hunyadiscus</i> Páll-Gergely in Páll-Gergely <i>et al.</i>, 2016: 6.</p><p><b>Type species</b></p><p><i>Hunyadiscus saurini</i> Páll-Gergely, 2016, by original designation.</p><p><b>Species included</b></p><p><i>Hunyadiscus andersoni</i> (Blanford, 1869), <i>H. saurini</i> Páll-Gergely, 2016 and <i>H. tigrina</i> sp. nov.</p><p><b>Diagnosis</b></p><p>The discovery of <i>Hunyadiscus tigrina</i> sp. nov. extends our knowledge of the geographic distribution and shell morphology of the genus <i>Hunyadiscus</i>. Most importantly, however, it represents the first known record of the anatomy of this genus. Therefore, the diagnosis of <i>Hunyadiscus</i> is extended.</p><p>Shell dextral, body whorl bluntly keeled or bluntly shouldered; protoconch with strong spiral and radial lines (spiral lines stronger than or as strong as radial lines); apertural fold absent; parietal wall with only a single lamella, or with a lamella and some additional plicae/denticles anteriorly and/or posteriorly; palatal plicae slightly sinuate, usually horizontal. Penis short, inner penial wall with a thickened, flashy structure that is rounded in the proximal part of the penis, and divided in the middle towards the distal penial part; bursa copulatrix short with ovoid bursa; diverticulum absent.</p><p><b>Differential diagnosis</b></p><p><i>Hunyadiscus</i> differs from all other plectopylid genera by the protoconch sculpture, which is characterized by both radial and spiral lines, the spirals being dominant or as strong as the radial lines. The most closely related genus is probably <i>Naggsia</i> Páll-Gergely & Muratov, 2016, because of the similar dextral coiling direction, the presence of spiral striation on the protoconch, the apertural fold absent or very weak and the absence of an epiphallus and because of the close geographic proximity. The two genera differ from each other in the following shell and anatomical characters: the shape of the body whorl is keeled/shouldered in <i>Hunyadiscus</i> and rounded in <i>Naggsia</i>; the protoconch bears a strong spiral striation in <i>Hunyadiscus</i>, and has extremely fine spiral lines in <i>Naggsia</i>; the inner penial wall has parallel folds in <i>Naggsia</i>, but a proximally rounded and distally divided, fleshy structure in <i>Hunyadiscus</i>; the diverticulum is well-developed in <i>Naggsia</i>, and absent in <i>Hunyadiscus</i>.</p><p><b>Distribution</b></p><p>Northern Laos, northern Thailand, southern Kachin State of Myanmar, and the bordering Chinese region.</p><p><b>Remarks</b></p><p>Table 1 summarizes the key characters of species of <i>Hunyadiscus</i>.</p>