Lepechinellidae Schellenberg 1926

• Main Authors: Johansen, Per-Otto, Vader, Wim
• Format: Text
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Lepechinellidae; Pacific; Kendall; Johansen; Chevreux; Thurston; Antarc*; Antarctica; Iceland; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.3794778; https://zenodo.org/record/3794778

Family Lepechinellidae Schellenberg, 1926 The amphipod Lepechinella chrysotheras , described by Stebbing (1908), was initially placed in the family Paramphithoidae Stebbing, 1906. Unaware of this, Chevreux (1914) described Dorbanella echinata and placed it in the family Tironidae Stebbing, 1906. Schellenberg (1925) described Dorbanella sp. and the family Dorbanellidae. One year later Schellenberg (1926) became aware of the earlier description of a Lepechinella species by Stebbing, and established the family name Lepechinellidae. Later J.L. Barnard (1973) transferred the genera Lepechinella and Paralepechinella Pirlot, 1933 to the family Dexaminidae Leach, 1814. Barnard & Karaman (1991) included Lepechinella Stebbing, 1908, Lepechinellopsis Ledoyer, 1982, Lepechinelloides Thurston, 1980 and Paralepechinella Pirlot, 1933 in the family Dexaminidae. Andres & Brandt (2001) revalidated the status of family Lepechinellidae. Sittrop & Serejo (2009) gave a more extensive historical review of lepechinellid systematics. Diagnosis Andres & Brandt’s diagnosis of Lepechinellidae from 2001 is based on the publications of Schellenberg (1926), J.L. Barnard (1970, 1973) and Bousfield & Kendall (1994): “Diagnosis: Body processiferous dorsomedially (variable), and/or covered with setae/spines. One to all coxal plates of peraeopods 1–4 acutely pointed distally, sometimes bifid. Ursomites 2 and 3 separate to completely fused. Accessory flagellum one- or two-articulate. Mandibular molar and palp present. Lower lip with inner lobes. Maxilla 2: inner plate without oblique row of setae. Peraeopods slender, elongate; peraeopods 5–7 similar, bases linear. Oostegites narrow. Rami of uropods styloid; uropod 3 outer ramus with tiny article 2. Telson normally excavate, lobes usually gaping widely.” Variations Rostrum present (e.g., Lepechinella ) or lacking (e.g., Lepechinelloides ); cephalic teeth present (e.g., Lepechinella ) or lacking ( Lepechinelloides , Paralepechinella ); urosome segments 2 and 3 separate ( Lepechinella wolffi ) to completely fused (e.g., Lepechinella echinata, L. drygalskii and L. curvispina, Paralepichinella spp.); mandibular molar triturative ( Lepechinella, Paralepechinella ) or non-triturative ( Lepechinelloides, Lepechinellopsis ); mandibular palp three-articulate ( Lepechinella, Lepechinellopsis, Paralepechinella ) or one-articulate ( Lepechinelloides ); uropods 1–3 outer rami reduced ( Lepechinellopsis ); telson cleft distally ( Paralepechinella longipalpa Pirlot, 1933). Type genus Lepechinella Stebbing, 1908 The genera included in Lepechinellidae are: Lepechinella Stebbing, 1908; Paralepechinella Pirlot, 1933; Lepechinelloides Thurston, 1980a; Lepechinellopsis Ledoyer, 1982. This paper also includes a new genus called Lepesubchela gen. nov. The type species of this genus is among others characterized by strongly subchelate peraeopods 6 and 7. Key to the genera of Lepechinellidae 1. Mandible palp 1-articulate ………………………………………… Lepechinelloides Thurston, 1980 – Mandible palp 3-articulate …………………………………………………………………………2 2. Peraeopods 6 and 7 clearly subchelate …………………………………… Lepesubchela (gen. nov.) – Peraeopods 6 and 7 simple …………………………………………………………………………3 3. Mandible palp with article 3 extremely long, longer than 10x article 2 … Paralepechinella Pirlot, 1933 – Mandible palp with article 3 normal, shorter than article 2 …………………………………………4 4. Uropods 1–3 with outer ramus strongly reduced, shorter than 1/3 of inner ramus ………………… ……………………………………………………………………… Lepechinellopsis Ledoyer, 1982 – Uropods 1–3 with outer ramus normal ………………………………… Lepechinella Stebbing, 1908 : Published as part of Johansen, Per-Otto & Vader, Wim, 2015, New and little known species of Lepechinella (Crustacea, Amphipoda, Lepechinellidae) and an allied new genus Lepesubchela from the North Atlantic, pp. 1-35 in European Journal of Taxonomy 127 on pages 3-4, DOI: 10.5852/ejt.2015.127, http://zenodo.org/record/3785109 : {"references": ["Schellenberg A. 1926. Die Gammariden der Deutschen Sudpolar-Expedition 1901 - 1903. Deutsche Sudpolar-Expedition 18: 235 - 414.", "Stebbing T. R. R. 1908. On two new Species of Northern Amphipoda. Journal of Linnean Society London, Zoology 30: 191 - 197. http: // dx. doi. org / 10.1111 / j. 1096 - 3642.1908. tb 02133. x", "Chevreux E. 1914. 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