Scaptognathus tridens Trouessart 1889
- Dataset
- Taxonomic review of the subfamily Lohmannellinae (Acari: Trombidiformes Halacaridae) with morphological comparisons among genera
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Arachnida
- order
- Trombidiformes
- family
- Halacaridae
- genus
- Scaptognathus
- species
- Scaptognathus tridens
diagnosis
Diagnosis. Glp- 1 not found. Ds- 2 on membranous cuticle. PE with 1 dorsal seta. GA bipartite in female and male. Female with 6 Pgs. Male with 20 Pgs and 6 Sgs. Tr I – IV with 1 - 0 - 1 - 1 setae; Bf I – IV with 2 - 2 - 1 - 1 setae; Tf I – IV with 4 - 3 - 3 - 3 setae, 2 - 1 - 0 - 0 Bp setae; Gn I – IV with 4 - 4 - 2 - 3 setae, 2 - 1 - 0 - 0 Bp setae; Tb I – IV with 8 - 7 - 7 - 7 setae, 5 - 4 - 4 - 4 Bp setae; Ta I – IV with 3 - 3 - 3 - 3 dorsal setae, without Bp setae. Lc I with unidentate accessory process. Idiosoma length 370 – 450 in adult. Idiosoma width 236 in female (body length 650), 285 in male (idiosoma length 418). Gnathosoma length 280 – 330 in adult. Gnathosoma width 133 in female (gnathosoma length 273). Ratio of gnathosoma to idiosoma 0.67 – 0.79. Ratio of P- 2 to P- 1 2.63. Remarks. This species is distinguished from congeners by the shape of AD, the lack of Glps on dorsum, and the absence of Bp setae on Ta I – IV. Female and male are known. Habitat. Sublittoral zone: Sandy sediment, sediment with algae, and coarse or shell gravels at 6 – 18 m depth. Distribution. North Atlantic Ocean: Roscoff (Bay of Morlaix), Le Croisic (Bay of Biscay) [France]. West Cork [Ireland]. Plymouth, Down [UK]. Mediterranean: Île Riou [France]. References. Abé (1990 c), Abé & Green (1994), André (1940, 1946), Bamber (1982), Bartsch (1978 b, 1979 a, 1986 b, 1994 b), Green & Macquitty (1987), Halbert (1915), Lohmann (1893 b, 1901), Monniot (1964), Somerfield (1991), Trouessart (1889 a, 1893, 1896 a), Trouessart & Neumann (1894 a, 1894 b). Depository. MNHNP (?).