Assiminea philippinica Boettger, 1887
“The populations in Thailand show great variability but even the most extreme forms do not deserve separate taxa as they are connected by intermediate forms. The colour is either unicolour brownish or yellowish or there are 1-3 darker brown spiral bands. The shape of the shell may be depressed conoidal or more elongately conic. The convexity of the whorls and with it the depth of the suture may be white or brownish. It is sometimes thickened to a drop-like callosity. The incised spiral lines are more often missing than present.” (Brandt, 1974)
Brandt (1974) descriptions on Assiminea (Metassiminea) philippinica – “Shell of medium to large size for the genus, moderately thick, ovate-conoidal, reddish or yellowish-brown, unicoloured or with 2 or 3 darker brown spiral bands. The 5 whorls are moderately convex and separated by an incised suture. The nuclear whorls are smooth and vitreous, the postnuclear whorls are sculptured with a thin subsutural thread and several fine incised spiral lines which may be reduced to one only. The narrow or closed umbilicus is surrounded by a very weak spiral thread. The body whorl measures 3/5 of the height of the shell. Aperture oval, angled above and well rounded below. Peristome sharp without, connected by a broken callus. Columella curved, broad, generally covering the umbilicus. Operculum oval, paucispiral, corneous but with a strong calcareous layer on the outer side. Muscle scar raised to a curved, corneous ridge.”
“Animal yellowish with black pigment dots and stripes on back, head and peduncles. Foot mottled with blackish pigment spots. Peduncles rather long, yellowish within and with black stripes without. Anterior part of suprapodium protruding, with several large glands. Male reproductive organs with comparatively large verge which is somewhat flattened and tapers to the round distal end. Tip tip is bulb-shaped. Radula with a squarish rhachis. Cutting edge with 5 cusps, basal cusps are missing. The laterals have 6 cusps, the inner marginals 6-7 and the outer marginals 20-22 cusps.” (Brandt, 1974)
Assiminea (Metassiminea) philippinica – “Size: A 4.0-6.0 mm; D 2.8-3.8 mm.” (Brandt, 1974)
Distribution – “Philippines, Java, Thailand.” (Brandt, 1974)
Habitat – “The species lives in mud-flats an brackish water creeks with muddy ground.” (Brandt, 1974)
Feeding behaviour –“…feeds on decaying organic substance.” (Brandt, 1974)