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Bunjamin Dharma
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Differences in shell morphology of the species Rochia nilotica (Linnaeus, 1767) and Rochia maxima (F. C. L. Koch, 1844) (Gastropoda: Tegulidae) Bunjamin Dharma; Delianis Pringgenies
Jurnal Moluska Indonesia Vol. 7 No. 1 (2023): April 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i1.82

Abstract

Rochia nilotica (Linnaeus, 1767) previously known as Trochus niloticus Linnaeus, 1767, is known in Indonesia by the local name “lola” or “lolak”. In Indonesian waters, “lola” is easily and widely found, its shiny shell has a high selling value and is an industrial commodity with an export orientation. The other most similar species is Trochus maximus F. C. L. Koch, 1844. In adult shells, T. niloticus and T. maximus are easily distinguished by the shape of their shells; but their juvenile and semi-adult shells are easily confused with one another. Both species have large shells, 110-120 mm in diameter and 115-140 mm in height. Initially, these two species were included in the genus Trochus Linnaeus, 1758 of the family Trochidae Rafinesque, 1815. Bouchet & Rocroi, 2005 in the “Taxonomy of the Gastropoda“ approved the validity of the family Tegulidae Kuroda, Habe, & Oyama, 1971 of the superfamily Trochoidea Rafinesque, 1815, separate from the family Trochidae Rafinesque, 1815. These two large species are included in the genus Rochia Gray, 1857 from the family Tegulidae, becoming Rochia nilotica (Linnaeus, 1767) and Rochia maxima (F. C. L. Koch, 1844). Included in the family Tegulidae, among which are the genera Rochia Gray, 1857; Tectus Montfort, 1810; and Tegula Lesson, 1833. This paper discusses the differences between the two species Rochia nilotica (Linnaeus, 1767) and Rochia maxima (F. C. L. Koch, 1844) in terms of shell morphology. KEYWORDS: Tegulidae, Rochia, nilotica, maxima
Rediscovery of the tree snail Bulimus appressus von Martens, 1867, with Bulimus perversus tener von Martens, 1867 placed as subspecies of Amphidromus palaceus (Mousson, 1848) (Gastropoda: Camaenidae) Bunjamin Dharma; Irwan Wipranata
Jurnal Moluska Indonesia Vol. 7 No. 2 (2023): Oktober 2023
Publisher : Masyarakat Moluska Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54115/jmi.v7i2.95

Abstract

Bulimus appressus von Martens, 1867 was described without shell image with the type locality "Java". In 1890, Boettger placed it under the genus Amphidromus Albers, 1850 as Amphidromus appressus (Von Martens, 1867); then Fulton, 1896 placed it as a variety of Amphidromus palaceus (Mousson, 1848). This variety status was followed by Pilsbry, 1900; Van Benthem Jutting, 1950; and Laidlaw & Solem, 1961. It was allegedly extinct, until the second author rediscovered several specimens in Cipayung, Bogor, West Java in April 2022. The shape of the shell is elongated, the spire is slightly tapered, the aperture is small, monochrome yellow or white in colour, without varices, and the sutures are appressed; based on these characteristics this variety is placed as a subspecies of Amphidromus palaceus (Mousson, 1848) as Amphidromus palaceus appressus (von Martens, 1867). Three specimens are deposited in MZB, Cibinong, Bogor, Indonesia. It is compared to the nominate subspecies Amphidromus palaceus palaceus (Mousson, 1848) and to Amphidromus toncruzi Dharma, 2012 from the Philippines whose suture of the last whorl is appressed to the penultimate whorl for 1.5 mm. This paper also discusses Bulimus perversus tener von Martens, 1867 from Mount Gedeh (Gede), West Java (van Benthem Jutting, 1950); the shell is small, relatively thin with a slightly tapered spire, monochrome light yellow in colour, without varices. Herein also this taxon is placed as subspecies of Amphidromus palaceus (Mousson, 1848), that is Amphidromus palaceus tener (von Martens, 1867). Compared with the nominate subspecies that has medium shell thickness and slightly convex spire.
Co-Authors Delianis Pringgenies Irwan Wipranata