Amphyllodomus incurvaria gen. et sp.n. (Crustacea, Amphipoda), a Remarkable Leaf-cutting Amphithoid from the Marine Shallows of Barbados

Amphyllodomus incurvaria gen. et sp.n. is described and figured. The species lives among hydroids and algae and has a remarkable domiciliary biology in that it carries around a house built of two oval pieces of brown algae cut out by the animal itself. The species is placed in the Amphithoidae, but certain deviations from that family place it in an isolated position.     

Polkepsilonema mombasae gen. et sp.n. andPternepsilonema servaesae gen. et sp.n. (Nematoda,Epsilonematidae) from East African coasts

Two new genera and species from Kenyan tidal areas,Polkepsilonema mombasae gen. et sp.n. andPternepsilonema servaesae gen. et sp.n., are described. Both are characterized by the presence of at least fourteen subcephalic setae and by thick thorns on the ventral body region of males. In the first genus, eight to ten subcephalic setae are situated anterior to the amphid, and the ambulatory setae are bisinuous. In the second, the subcephalic setae are situated at the posterior edge of the rostrum, and the ambulatory setae are straight.A key to the 13 genera of the Epsilonematidae is presented.Abbreviations a body length divided by maximum body diameter - abd body diameter at level of anus - amph % diameter of amphid as a percent of head diameter - Asl length of anteriormost ambulatory seta of external subventral row - b body length divided by pharyngeal length - c body length divided by tail length - cs length of cephalic setae - dcs distance from rostrum edge to cephalic setae - gub length of gubernaculum - L body length - lct length of copulatory thorns - lpt length of precloacal thorns - mbd maximum body diameter of posterior body region - (mdb) minimum body diameter - mbd/(mbd) maximum body diameter divided by minimum body diameter - mbd ph body diameter at level of pharyngeal bulb - N number of body rings - ph length of pharynx - spic length of spicule measured along the arc - SSph length of subdorsal somatic setae in pharyngeal region - t tail length - tmr length of nonannulated tail region - V position of vulva as a percentage of total body length from anterior     

Tanganyikacypridopsis gen.n. (Crustacea, Ostracoda) from Lake Tanganyika

A new genus of freshwater ostracods, Tanganyikacypridopsis gen.n., is established to include the species Potamocypris depressa Kiss, 1959, Cypridopsis calcarata Rome, 1962 and Cypridopsis anomala Rome, 1962, all from Lake Tanganyika. The genus is related to Sarscypridopsis McKenzie, 1977 and Plesiocypridopsis (Rome, 1965), mainly because of its hemipenis anatomy, and is believed to be endemic to Lake Tanganyika.     

Inanidrilus bulbosus gen. et sp.n., a Marine Tubificid (Oligochaeta) from Florida, USA

Inanidrilus bulbosus gen. et sp.n. is described from subtidal sands near Miami, Florida. The species lacks alimentary canal, but it possesses highly modified penial setae and an unpaired dorsal spermatheca. It appears closely related to Phallodrilus Pierantoni, but since it is devoid of anterior prostate glands, which are attached to the ental ends of the atria in Phallodrilus , a new monotypic genus, Inanidrilus gen.n., is established.     

Acanthopale perkinsi gen. et sp.n. (Polychaeta, Chrysopetalidae) from Cuba and Florida

Acanthopale perkinsi gen. et spa, from coral reefs near the Isle of Pines, Cuba, and from off the coast of Florida is described. The genus is characterized principally by the shape and distribution of paleae, insertion of the median antenna, and presence of a caruncle and a mouth cover. Notosetae (paleae) are similar in shape to the stalks of a rosebush, with two perpendicular series of alternate spines. Paleae of the anterior group are approximately one third the length of those of the posterior group, which are very long and slender. The new genus is discussed and compared with the other genera of Chrysopetalidae.     

Echiuropus bekmanae n.sp. (Crustacea, Amphipoda, Carinogammaridae) from Lake Baikal, retrieved by a new deep-water sampling device

Lake Baikal is well known for its exceptional diversity of gammarid amphipods, with 95% of endemics from its 270 described species representing about 20% of the world freshwater fauna. Echiuropus (Asprogammarus) bekmanae n.sp. was collected by an `autonomous trap system', a sampling device thoroughly described here. Although not necrophagous itself, this new species was found in two baited trap samples (at 750 and more than 1600 m) from 1995 and 1996. This rather small (13 mm) deep water species is the eighth species of the subgenus Asprogammarus, of the Baikal endemic genus Echiuropus. Diagnoses of the subgenus and the closer species are given.     

Petrocha notogaea gen. et sp.n., a neotenic interstitial polychaete (Dorvilleidae) from the Hauraki Gulf, New Zealand

Petrocha notogaea represents a new interstitial dorvilleid genus from subtidal medium coarse sands. With its distinctly neotenic characters, such as one pair of short palps, ciliary rings on all parts of the body, setigers with uniramous parapodia, simple capillaries, simple heterogomph falcigers and comparatively small size (1.2–1.4 mm), it shows close phylogenetic affinity to several other taxa of the Dorvilleidae, such as Ikosipodus, Microdorvillea, Arenotrocha and Pusillotrocha , which have only been described in the last four years.     

Rostromysis bacescuii gen. et sp. nov. and Megalopsis den-ticauda gen. et sp. nov. (Crustacea -- Mysidacea) from the south-west coast of Australia

Rostromysis bacescuii gen. et sp. nov. and Megalopsis denlicaudagen. et sp. nov. belonging to the tribe Leptomysini are describedfrom the south-west coast of Australia. The characters uniqueto the genus Rostromysis are the unusually long club-shapedrostrum and the large delicate lamella-like pleopods of thefemale, thus easily distinguishing it from the allied generaTenagomysis and Doxomysis. The genus Megalopsis is closely alliedto Leptomysis, Prionomysis and Promysis but is readily distinguishablein having a short linguiform uncleft telson with a pair of medianplumose setae.     

Sarsicopia polaris gen. et sp.n., the first platycopioida (Copepoda: Crustacea) from the Arctic Ocean,and its phylogenetic significance

A new genus of Platycopioida is described from a boxcore sample taken at a depth of 534 m in the ArcticBarents Sea. This is the deepest record ofPlatycopioida so far. Sarsicopia gen. n. is thesistergroup of a taxon comprising Platycopia and Nanocopia; the sistergroup ofthese is Antrisocopia. Sarsicopia gen. n.is the only platycopioid to retain 2 inner setae onthe second endopod segment P2–P4, and 8 setae in thethird endopod segment of P2. The male antennnule isremarkable in having a geniculation located betweenancestral segments XX and XXI. It is suggested thatthis flexure zone was already present in thegroundpattern of Copepoda. Platycopia and Nanocopia have secondarily lost thisgeniculation.     

New hyalellids (Crustacea, Amphipoda, Hyalellidae) from Lake Titicaca

Two new species of hyalellid amphipods, Hyalella crawfordi and H. gauthieri, are described from Lake Titicaca; H. echinus (Faxon, 1876) is redescribed. The H. echinus group of species is newly proposed for these three species, and a group diagnosis is provided. A key to the three species in the group is provided Full article published online at http://www.senckenberg.de/odes/06-10.htm.     

Serratotantulus chertoprudae gen. et sp. n. (Crustacea, Tantulocarida, Basipodellidae): A new tantulocaridan from the abyssal depths of the Indian Ocean

A single tantulus larva was found at the abyssal depth of the Indian Ocean attached to a harpacticoid host of the family Cletodidae. It represents a new genus and species of Tantulocarida, family Basipodellidae. Its ultrastructure was studied with SEM. This genus can be easily distinguished from the other genera of Basipodellidae by the pore pattern, bilobed oral disk with strong longitudinal ridges and the posterior projection of the cephalic shield. A morphological analysis of two related families Basipodellidae and Deothertridae shows that they represent polyphyletic taxa and need further revision.     

Thermopsis thermophila n. gen. n. sp. from hot springs in Nevada, U.S.A. (Crustacea, Ostracoda)

Thermopsis thermophila n. gen. n. sp., a new freshwater ostracod species is described from hot springs in Nevada, U.S.A. The animals were collected within a temperature range of 40–55°C. The new genus belongs to the Ostracoda Podocopida Cypridoidea Cyprididae Cypridopsinae.     

Ingolfiella maldivensis sp. n. (Crustacea,Amphipoda, Ingolfiellidae) from coral reef sand off Magoodhoo island,Maldives

A new species of marine interstitial wormshrimp, Ingolfiella maldivensis, is described from coral sand on the inner and outer reef off Magoodhoo island, Faafu atoll, Maldives. Six females were found and compared to other species from the Maldives and those bordering the Indian Ocean and beyond. Morphological resemblance ties it to a species from the Caribbean island of Curaçao. Both species are found in shallow sublittoral interstitial spaces.     

Forticulcita glabra gen. et sp. n. (Digenea, Haploporidae) in a Red Sea Mullet

The genus Forticulcita was established solely for F. glabra sp. n. from Valamugil seheli (Forsskål) in the Gulf of Aqaba. Most closely related to Haploporus , it is diagnosed primarily by having a species with an acetabulum being conspicuously robust, prepharynx measuring shorter than the pharynx, ceca terminating at the testicular level, muscular hermaphroditic ejaculatory organ lacking accessory structures, and vitellarium consisting of a single mass.     

A New Polystiliferous Hoplonemertean, Curranemertes natans gen. et sp.n., from the Caribbean Sea (Nemertina, Polystilifera Reptantia)

A polystiliferous hoplonemertean, Curranemertes natans gen. et sp.n., is described from Venezuela where it was found on corals in shallow water. It is the third species of reptantic Polystilifera known from the Caribbean Sea. Anatomically the new species shows affinities to the genera Punnettia, Polyschista , and Drepanophorina , but because of differences in the nervous system, cerebral organs, and alimentary tract, a new genus is proposed for it.