Páll-Gergely et al. , 2016: 6 Systematic revision of the Plectopylinae (Gastropoda, Pulmonata, Plectopylidae) Páll-Gergely, Barna European Journal of Taxonomy 2018 2018-08-16 455 1 114 7P5HQ Pall-Gergely, 2016 Pall-Gergely 2016 [642,1028,1427,1454] Gastropoda Plectopylidae Hunyadiscus GBIF,CoL Animalia Stylommatophora 67 68 Mollusca genus     HunyadiscusPáll-Gergely in Páll-Gergely et al., 2016: 6.     Typespecies   Hunyadiscus sauriniPáll-Gergely, 2016, by original designation.    Species included   Hunyadiscus andersoni( Blanford, 1869),  H. sauriniPáll-Gergely, 2016and  H. tigrina sp. nov.    Diagnosis The discovery of  Hunyadiscus tigrina sp. nov.extends our knowledge of the geographic distribution and shell morphology of the genus  Hunyadiscus. Most importantly, however, it represents the first known record of the anatomy of this genus. Therefore, the diagnosis of  Hunyadiscusis extended. 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.   Differential diagnosis   Hunyadiscusdiffers 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  Naggsia 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  Hunyadiscusand rounded in  Naggsia; the protoconch bears a strong spiral striation in  Hunyadiscus, and has extremely fine spiral lines in  Naggsia; the inner penial wall has parallel folds in  Naggsia, but a proximally rounded and distally divided, fleshy structure in  Hunyadiscus; the diverticulum is well-developed in  Naggsia, and absent in  Hunyadiscus.    Distribution Northern Laos, northern Thailand, southern Kachin Stateof Myanmar, and the bordering Chinese region.    Remarks  Table 1summarizes the key characters of species of  Hunyadiscus.