Schisturella Norman 1900
- Dataset
- The Tryphosa group (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae)
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Uristidae
- genus
- Schisturella
discussion
Remarks. Based on the diagnostic characters presented here, there are three main morphological characters that distinguish Schisturella from Pseudonesimus: the long robust seta present distally on the first article of the antenna 1 flagellum (absent in Pseudonesimus); the gnathopod 1 carpus length, which is subequal to or longer than the propodus (shorter in Pseudonesimus) and the shape and orientation of the gnathopod 1 palm which is acute and straight or slightly concave (convex in Pseudonesimus).
distribution
Distribution. Arctic, Atlantic, and Pacific Oceans.
type_taxon
Type species. Tryphosa pulchra Hansen, 1888, monotypy. Included species. Schisturella includes seven species: S. adversicola (K. H. Barnard, 1925); S. cocula J. L. Barnard, 1966; S. dorotheae (Hurley, 1963); S. hansgeorgi Larsen, 2007; S. pulchra (Hansen, 1888); S. rosa sp. nov.; S. spinirama Hendrycks & Conlan, 2003. Diagnostic description. Antenna 1 flagellum article 1 with robust seta on distal margin; accessory flagellum forming cap. Antenna 2 flagellum articles 3 – 5 slender, or article 4 slightly swollen in male; articles 4 – 5 with brush setae on the anterior margin. Mandible incisor curved; molar with reduced column and convex triturating surface (button); palp attached midway to distally. Maxilla 1 ST- 7 serrate along distomedial margin; ST-D slender, serrate along distomedial margin. Maxilliped outer plate multiple apical robust setae present. Gnathopod 1 subchelate; coxa vestigial; carpus subequal to or longer than propodus; propodus palm acute, straight or slightly concave. Pereopod 4 coxa with well-developed posteroventral lobe. Uropod 2 inner ramus constricted. Uropod 3 rami with plumose setae in adult male, present or absent in adult female. Telson moderately to deeply cleft.