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Pseudunela marteli
Pseudunela marteli is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Pseudunelidae. The specific name marteli is in honour of author's "big-hearted friend and colleague" biologist Martin “Martl” Heß from Ludwig Maximilian University of Munich, because the species has a large heart-bulb.[2] DistributionPseudunela marteli is known from Guadalcanal, Solomon Islands and Oyster Island, Vanuatu.[2] The type locality is beach of “Art Gallery”, Honiara, Guadalcanal, Solomon Islands.[2] DescriptionExternal morphology and anatomy of Pseudunela marteli is the same as in Pseudunela viatoris with the following exceptions:[2] Colour of digestive gland is greenish or orange-brownish.[2] Eyes (30–35 μm) are pigmented and well visible externally.[2] Foot length is up to half of the visceral hump.[2] Subepidermal spicules are more abundant in cephalic tentacles, foot and visceral hump.[2] digestive system: the radula formula is 57–59×1.1.?; rhachidian tooth with 3–4 denticles per side.[2] reproductive system: the hollow curved penial stylet measures 130 μm in length, the stylet of basal finger is 30 μm long.[2] The ampulla is sac-like; allosperm receptacles are absent in the examined specimen.[2] The albumen and mucous glands are tubular; the membrane gland is sac-like.[2]  lt – labial tentacle, rh – rhinophore, ey – eye, hb – heart bulb, f – foot, vh – visceral hump. EcologyPseudunela marteli is a minute species that lives in the spaces between sand grains in saltwater habitats, and it is thus considered to be a mesopsammic, marine interstitial animal that is part of the meiofauna of marine sands.[2] ReferencesThis article incorporates CC-BY-2.5 text from the reference[2]
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