Landouria bella and Landouria monodon (Camaenidae Pilsbry 1895), new species from Thailand

NEWS - Researchers described the genus Landouria (Godwin-Austen, 1918) and identified two new species, Landouria bella and Landouria monodon. The team from Chaiyaphum Rajabhat University in Chaiyaphum and Mahasarakham University in Maha Sarakham noted that the two species were distinct from each other in the genus.

Hirano et al. (2014) suggested that Landouria is a junior synonym of Aegista. In fact, a unique characteristic shared by all Landouria members in Thailand is the absence of a dart sac and a stimulatory organ, a combination of characters that are considered to define the family Camaenidae.

Benchawan Nahok and team showed that Landouria and Aegista are two distinct genera. Landouria has a small, compressed shell, a wide, open umbilicus, and the presence of flagella of various shapes. To date, more than 50 species have been recorded in the genus.

L. bella was collected from isolated limestone hills in Ratchaburi and Phetchaburi provinces, western Thailand. Small, concave-rounded shell without peripheral keel, presence of small and thin lamellae on the columellar side of the inner aperture, long, cylindrical, bent distally flagellum, short penis with rounded verge, short and thick free oviduct and vagina.

L. monodon was collected from sandstone hills in Kalasin Province, northeastern Thailand. The shell is concave-conical with blunt peripheral keel, thick prominent lamellae on the columellar side of the inner aperture, short, finger-shaped, bent distally flagellum, long penis with small and short verge.

Landouria bella and Landouria monodon (Camaenidae Pilsbry 1895), new species from Thailand 2

L. bella differs from all other species from Thailand by its concave and rounded shell. Other Thai Landouria species usually have slightly angular to prominent keels on the edges, as seen in L. monodon. The presence of small and thin columellar lamellae on the inner aperture of L. bella resembles that of L. monodon, but is more prominent.

Original research

Nahok B, Chanlabut U, Tumpeesuwan S, Tumpeesuwan C (2024) Two new species of Landouria Godwin-Austen, 1918 (Gastropoda, Camaenidae) from Thailand, with a key to Thai species. ZooKeys 1208: 347-362. DOI:10.3897/zookeys.1208.117056

Giant green leech (Raksasa hijau)

Lintah raksasa or giant green leech ( Raksasa hijau ) is a species of animal in Salifidae, large green leeches, carnivores, not hematophagic, can grow to lengths of more than 50 cm, the front is perfectly tubular, but it is getting bigger, wider and flat backward. R. hijau has a front end that ends with a white mouth and has a width equal to the diameter of the front end of the body. The rear end ends with the anus and has a width equal to the diameter of the rear end of the body. The upper surface is whole dark green or leafy green, looks shiny and has no other additional color features. The bottom surface is lighter or brownish green. The skin is wrinkled like tight, elastic joints that make it possible to lengthen the body. Giant green leech moves forward by extending the tip of the front of the body to keep the new location farther away and this movement is then followed by the middle body and gradually the rear where the body moves completely. R. hijau does not suck blo...

Telotaun (Manihot carthagenensis)

Telotaun ( Manihot carthagenensis ) is a plant species in Euphorbiaceae, trees or shrubs 2-10 m tall, erect and fibrous, white latex, leaves varying with the subspecies noted are Manihot carthagenensis ssp. carthagenensis , Manihot carthagenensis ssp. glaziovii and Manihot carthagenensis ssp. hahnii . M. carthagenensis has an erect stem, a tubular shape, a young stem which is bright green and covered in white wax, an old stem that has a thin layer of brown skin. Long leaf stems and white waxy, arranged alternately, growing in all directions, green on the bottom and redish on the top. Leaves have 3-7 fingers each up to 25 cm long and up to 15 cm wide, ellipses become obovoid, sometimes pandurate and apex acute. Each leaf finger has a bone in the middle that moves linearly with some pinnate bones. The upper surface is green and slightly shiny, the lower surface is whitish green. The base of the leaf is centered at the end of the stalk, the pointed end which ends at the head of the sp...

Purwaceng (Pimpinella pruatjan)

Purwaceng or purwoceng or antanan gunung or Viagra of Java ( Pimpinella pruatjan or Pimpinella priatjan ) are small termas growing horizontally in Apiaceae, growing in villages on Dieng Plateau, Central Java Province, Indonesia, at 1,500 to 2,000 meters above sea level, the roots have medicinal properties for aphrodisiacs and are usually processed in powder form for a mixture of coffee or milk. P. pruatjan grows flat on the ground but does not propagate, small leaves are reddish green for 1-3 cm in diameter. This plant is only found in Java and grows in high mountain areas. A low population where industrial demand is very high results in increasingly scarce. Another place that is likely to become a purwaceng habitat is the Iyang Mountains and the Tengger Mountains in East Java Province. Efforts to multiply and cultivate have a big problem where these plants have difficulty producing seeds. In vitro propagation research through tissue cultivation has been carried out to overcome ...

Dlium