Diaphera prima Panha, 2010

Páll-Gergely, Barna, , András Hunyadi, Sutcharit, & Chirasak, 2024, New and little-known Diapheridae of Cambodia and Thailand (Gastropoda: Stylommatophora: Streptaxoidea), Raffles Bulletin of Zoology 72, pp. 203-213 : 207

Diaphera prima Panha, 2010

( Figs. 3, 4, 6C)

Diaphera prima Panha in Sutcharit et al., 2010: 5–9 , figs. 1b–g, 2. Type locality: Khao Cha Ang-Oan , Bor Thong, Chonburi, Thailand.

Diagnosis. Ribbing only visible near the suture, mid-parts of whorls are smooth or even if some very fine ribbing is visible, it is distinctly weaker than along the suture; aperture rounded with a strongly elevated parieto-angular lamella, a blunt upper parietal and an elongated lower parietal tooth, a small basal tooth, and an elongated, blade-like columellar lamella. The most similar species is D. saurini , in which the ribs do not stop at the middle of the whorls. All other traits (e.g., apertural barriers) of the two species are similar.

Material examined. 18 shells (coll. HA), Cambodia, Battambang Province, Phnum Proek District, Phnom Prampi Cave , 90 m asl, 13°18.831′N, 102°36.490′E coll. A. Hunyadi & J.U. Otani, 10 October 2023 ; 1 shell ( Fig. 3) ( CUMZ 14216 ), Same data as for preceding ; 1 shell ( UF 346375 ) , Thailand, Chachoengsao Province, Khao Tham Raet , 5 km ENE Ban Non Khok, 100 m asl, 13°26′6″N, 101°44′10″E, coll. F.G. Thompson, FGT-4255 , 11 May 1987 ; 7 shells ( UF 346372 ) , Thailand, Chachoengsao Province, Khao Tham Raet , 5 km ENE Ban Non Khok, 100 m asl, 13°26′6″N, 101°44′10″E, leg. F.G. Thompson, FGT-4254 , 11 May 1987 ; 2 shells ( UF 279209 ) , Thailand, Chon Buri Province, Khao Cha Ang , ca. 17 km ESE, 4.0 km S of Om Phanom, 150 m asl, 13°10′57″N, 101°35′16″E, leg. F.G. Thompson, FGT-4220 , 26 April 1987 ; 2 shells (coll. HA), Thailand, Chon Buri Province, Bo Thong District, rock wall behind Wat Khao Ha Yot , 150 m asl, 13°09.775′N, 101°35.858′E, leg. A. Hunyadi, 9 March 2023 ; 1 shell ( UF 279183 ) , Thailand, Rayong Province, Khao Bot , ca. 6 km N, 2.0 km W of Ban Syaek Batan, 150 m asl, 13°02′05″N, 101°38′30″E, leg. F.G. Thompson, FGT-4218 , 25 April 1987 ; 4 shells (coll. HA), Thailand, Rayong Province, Khao Chamao District, Wat Tham Khao Prathun , gorge above the temple, 115 m asl, 13°07.439′N, 101°35.850′E, leg. A. Hunyadi, 9 March 2023 ; 3 shells ( Fig. 4B) (coll. HA), Thailand, Rayong Province, Khao Chamao District, rock wall behind Wat Tham Khao Bot , 70 m asl, 13°02.273′N, 101°38.120′E, leg. A. Hunyadi, 9 March 2023 ; 2 shells ( Fig. 4A) (coll. HA), Thailand, Sa Kaeo Province, Khao Chakan District, vicinity of Wat Tham Khao Chakan , 80 m asl, 13°39.668′N, 102°05.195′E, leg. A. Hunyadi, 9 March 2023 .

Remarks. A widespread and not conspicuously variable species.