Leptognathiidae Sieg, 1973 sensu Larsen & Shimomura 2007

• Main Author: Bird, Graham J.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Tanaidacea; Leptognathiidae; Kamchatka
• Online Access: https://zenodo.org/record/6240043; https://doi.org/10.5281/zenodo.6240043

Family Leptognathiidae Sieg, 1973 sensu Larsen & Shimomura (2007) (restricted synonymy and bibliography) Leptognathiidae Sieg, 1973: unpublished, but see Sieg, 1976. Sieg, 1976: 185, 194. Leptognathiidae subfamily Leptognathiinae: Sieg, 1986 b: 110. Anarthruridae Lang, 1971 subfamily Leptognathiinae: Sieg, 1986 a, 21, 44. Gutu & Sieg, 1999: 384. Leptognathiidae Sieg, 1973 [revised]: Larsen & Wilson, 2002: 2, 13. Larsen & Shimomura, 2007: 14. Genera included (Japanese and Kurile-Kamchatka genera in bold): Biarticulata Larsen & Shimomura, 2007; Forcipatia Larsen & Shimomura, 2007; Leptognathia G.O. Sars, 1882. Diagnosis (after Larsen & Shimomura 2007). Female. Medium body calcification. No plates in carapace. Eyes and eye-lobes absent. Pereon with six free pereonites; pereonite 1 not reduced. Pleon with five free pleonites, as wide as pereon; articulated setae on pleonites absent. Antennule four-articled. Antenna five or sixarticled, article 3 without spiniform setae dorsally. Molar process of mandible pointed. Labium with one pair of lobes, medial spiniform setae absent. Maxilliped bases fused, endites not fused, narrower than basis, without setose or serrated anterio-lateral corners, flat setae or denticles. Cheliped slender and attached via sclerite, fixed finger and dactylus elongated or simple. Pereopod coxae present or absent on pereopods 1–3 but always absent on pereopods 4–6; dactylus and unguis of pereopods 4–6 not fused. Pleopods well developed or absent. Uropodal endopod two-articled, exopod one or two-articled. Marsupium of four pairs of oostegites. Preparatory male. Generally as above but antennule thicker and pleon and pleopods more well-developed. Natatory (terminal) male. Body significantly shorter than female. Pereonites less, pleonites more developed than in female. Antennule seven-articled, densely packed with aesthetascs. Mouthparts reduced. Cheliped not enlarged. Pleopods well developed. Remarks. As has happened with the Family Anarthruridae (Bird 2004), the ...