Aiteng ater
Aiteng ater is a species of sea slug, a marine gastropod mollusc in the family Aitengidae. The specific name "ater" is from the Latin language and means black, in reference to the appearance of the slug on the mud. "Aiteng ater" was chosen by the International Institute for Species Exploration of Arizona State University to be one of the "Top 10 New Species described in 2009". Distribution. The distribution of "Aiteng ater" includes Thailand. The type locality is 8°29'18" N, 100°10'55" E, Amphoe Pak Phanang, Pak Phanang Bay, in the Gulf of Thailand. Description . The size of the body is 8–12 mm. The shape of the body is elongate, but broad. The color of the slug is from grey to black. The eyes are the only externally clearly visible feature on its head. "Aiteng ater" has an unusual combination of morphological characters: This species lacks several acochlidian characteristics: "Aiteng ater" has a notum with a free margin. However, in the absence of a separated visceral hump, "Aiteng ater" is able to retract its head under the frontal part of the notum. Ecology. "Aiteng ater" is an amphibious species which lives in mangrove forests in  the intertidal zone, on the mud. It lives "amphibiously", and tolerates marine to brackish waters, but there are no observations of these animals truly leaving the water. "Aiteng ater" feeds on insects, (is insectivorous). In the laboratory it has been observed to eat pupae of beetles (Coleoptera), pupae of Lepidoptera, imagos of mosquitos and larvae of ants. Inside the bodies of individuals of "Aiteng ater", there were found to be white elongated endoparasites; these are as yet unstudied. However the "parasites" described for "Aiteng ater" might represent spicules instead, because the presence of spicules is confirmed for the undescribed species  Aitengidae sp. from Japan. References. This article incorporates CC-BY-2.0 text from Jörger et al. 2010.