Information from the abstract
Dicharax cristatus (Möllendorff, 1886) Figs 5 A, 6 Alycaeus cristatus Möllendorff, 1886: 168, pl. 5, fig. 6. Type locality: Hunan, China. Dicharax cristatus – Páll-Gergely et al. 2017: 34–43, figs 12 c, d, 13 c, 24–27, 28 a – d, 29 c, d, 30. Páll-Gergely et al. 2020 d: 57. Material examined. Laos • 139 shells; Vientiane Province, Feuang District, unnamed limestone hill (loc. MF 1); 18°40'29.2"N, 102°02'18.4"E; 320 m a. s. l.; 7 Oct. 2024; leg. CU - NUOL expedition team; CUMZ 14480 (Figs 5 A, 6) • 34 shells; Vientiane Province, Feuang District, Pha Reung (loc. MF 14); 18°44'20.4"N, 102°07'02.9"E; 360 m a. s. l.; 10 Oct. 2024; leg. CU - NUOL expedition team; CUMZ 14481. Diagnosis. Shell depressed-conical. Spire ~ 1 / 5 of shell height. R 1 with regular ribs; R 2 as long as or slightly shorter than R 3. R 3 with sharp or moderately sharp swelling, in the middle of R 3 or close to the aperture. Inner peristome sometimes with conspicuous upper incision. Outer peristome expanded, not reflected. Differential diagnosis. See Páll-Gergely et al. (2017: 43). Distribution. Gansu, Shaanxi, Sichuan, Yunnan, Hunan, Hubei, Guangxi provinces, China; northern Vietnam; Luang Prabang Province (Páll-Gergely et al. 2017), and Feuang District, Vientiane Province, Laos. Remarks. The current species boundary of D. cristatus based on morphological characters is wide, varying in shell size, spire height (flat to somewhat elevated), peristome (strongly crenulated to not crenulated), R 1 sculpture (smooth to regularly ribbed), and the absence or presence or the position of the swelling on R 3. Therefore, there are no unique set of characters unequivocally defining D. cristatus (Páll-Gergely et al. 2017). It is possible that future molecular studies may show that this nominal taxon contains multiple lineages. See earlier taxonomic treatment of D. cristatus in Páll-Gergely et al. (2017, 2020 d).
Why this record is monitored
This record has an Impact Signal of 76/100 based on recency, source, collaboration, and bibliographic signals. It prioritizes monitoring and is not a judgment of research quality.
Related topics: Marine Bivalve and Aquaculture Studies · Diatoms and Algae Research · Mollusks and Parasites Studies
Thai researcher and institutional participation
Parin Jirapatrasilp · Teerangkul Janjai · Ekgachai Jeratthitikul · Natdanai Likhitrakarn · Ruttapon Srisonchai · Chirasak Sutcharit · Chulalongkorn University · Mahidol University · Maejo University · Khon Kaen University
Data limitations
This page is a bibliographic record based on abstract-level information, not a full analysis or quality assessment. Verify the DOI and original article before citation.