Scaptognathus gibbosus Bartsch 1977
- 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 gibbosus
diagnosis
Diagnosis. Ds- 2 on membranous cuticle. PE with 1 dorsal seta. GA bipartite in female and male. Female with 4 or 5 Pgs and 0 Sgs. Male with 12 Pgs and 4 Sgs. Tr I – IV with 0 - 0 - 1 - 1 setae; Bf I – IV with 2 - (1,2) - (1,2) - 1 setae; Tf I – IV with 2 - 2 - (1,2) - 1 setae, without Bp seate; Gn I – IV with 5 - 4 - 2 - 2 setae, 2 - 0 - 0 - 0 Bp setae; Tb I – IV with 6 - 5 - 5 - 5 setae, 3 - 2 - 2 - 2 Bp setae; Ta I – IV with 3 - 3 - 3 - 3 dorsal setae, 1 - 0 - 0 - 0 Bp setae. Lc I with either no or fine accessory process. Idiosoma length 129 – 182 in female, 151 – 176 in male, 142 – 158 in DN, 112 – 117 in PN. Idiosoma width 86 – 123 in female, 88 – 114 in male, 79 in DN, 77 in PN. Gnathosoma length 137, 153 (idiosoma length 175) in female, 124 – 135 (idiosoma length 155 – 163) in male, 124 – 133 in DN, 107 – 112 in PN. Gnathosoma width 60, 74 (idiosoma length 175) in female. Ratio of gnathosoma to idiosoma 0.78 – 0.87 in female, 0.80 – 0.83 in male, 0.84 – 0.87 in DN, 0.96 in PN. Remarks. This species is similar to S. pacificus in the body size and the possession of 3 Bp setae on Tb I. However, S. gibbosus is distinguished from the latter by the absence of Bp setae on Tf I and the presence of a single Bp seta on Ta I. A dorsal seta is present at the proximal portion of P- 2 in the Somarian and Brazilian specimens (Morselli & Mari 1986, Pepato et al. 2011). On the other hand, the proximal seta is not found on P- 2 in the original figuration in Bartsch (1977 a). Female, male, DN, and PN are known. Habitat. Littoral zone: Sediment at littoral zone. Distribution. South Pacific Ocean: Bartholomé, Santa Cruz (Galapagos Is.) [Equador]. Indian Ocean: Sar Uanle [Somalia]. South Atlantic Ocean: São Francisco [Brazil]. References. Abé (1990 c), Abé & Green (1994), Bartsch (1977 a, 1994 b), Bartsch & Schmidt (1978), Morselli & Mari (1986), Pepato et al. (2011). Depository. ZIZMH.
Name
- Homonyms
- Scaptognathus gibbosus Bartsch 1977