By Fatimah Novianti, Felicia Zahida, Wibowo Nugroho Jati1 & Ayu Savitri Nurinsiyah
Cyclophorus represents one of the genera within the realm of terrestrial gastropods, dwelling predominantly amidst the forest floor, leaf litter, rocky outcrops, and decomposed wood. This investigation endeavors to elucidate the morphological and anatomical attributes exhibited by the genus Cyclophorus in Indonesia, alongside its phenetic associations. Employing a descriptive approach, meticulous scrutiny was directed towards shell morphology, operculum characteristics, and anatomical features. Utilizing cluster analysis in Rstudio facilitated the examination of morphological data, shedding light on the phenetic interconnections. Through the examination of 214 shell specimens and 21 genitalia samples, comprising 12 identified Cyclophorus species and subspecies stored within the confines of the Museum Zoologicum Bogoriense (representing a fraction of the total 20 species and subspecies documented in Indonesia), distinct variations were discerned. The morphological disparities within Cyclophorus in Indonesia, specifically pertaining to shell configuration, patterns, spiral bands, whorl count, shell diameter, and operculum attributes, emerged as distinguishing features. Notable diagnostic traits within the genitalia encompassed the presence of bursa copulatrix and oviduct in females, and the morphology of the penis in males. The cluster analysis delineated six discernible groups among adult shells and opercula, elucidating distinct categorizations: (1) C. nigricans from Sulawesi, posited as a distinct species endemic to the eastern Indonesian region; (2) C. rafflesii eximius from Sumatra and Java; (3) C. theobaldianus from Kalimantan; (4) C. rafflesii and C. rafflesii rafflesii from Sumatra and Java; (5) C. schepmani and C. stevenabbasorum from Sumatra, purportedly representing quintessential species of the island; and (6) C. tuba plicifera, C. tuba, C. perdix, C. perdix perdix, and C. perdix borneensis from Sumatra, Java, and Kalimantan, exhibiting distinctive distributions across the region.
Source:
留言