Lohmannella falcata
Lohmannella falcata (Hodge, 1863) Diagnosis. Two corneae usually present (varies 0–2). Ds-2 on membranous cuticle. Ds-3 on membranous cuticle. Two dorsal setae on PE. Female with 32–34 Pgs and 8 Sgs. Male with 75–79 Pgs and 8 Sgs. Tr I–IV with 1-1- 1-1 setae; Bf I–IV with 3-3-3-3 setae; Tf I–IV with...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2021
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| Online Access: | https://zenodo.org/record/4984895 https://doi.org/10.5281/zenodo.4984895 |
| Summary: | Lohmannella falcata (Hodge, 1863) Diagnosis. Two corneae usually present (varies 0–2). Ds-2 on membranous cuticle. Ds-3 on membranous cuticle. Two dorsal setae on PE. Female with 32–34 Pgs and 8 Sgs. Male with 75–79 Pgs and 8 Sgs. Tr I–IV with 1-1- 1-1 setae; Bf I–IV with 3-3-3-3 setae; Tf I–IV with 6-7-5-5 setae; Gn I–IV with 8-8-5-5 setae, (2–4)-4-2-2 Bp setae; Tb I–IV with 11-9-7-6 setae, (5,6)-5-4-3 Bp setae; Ta I–IV with 3-3-4-(3,4) dorsal setae, (1,2)-1-2-1 Bp setae. Lc I with either no or unidentate accessory process. Idiosoma length 298–515 in female, 335–490 in male, 298–402 in DN, 240–292 in PN, 168 in LV. Idiosoma width 291 (idiosoma length 374) and 308 (idiosoma length 375) in male. Gnathosoma length 232–260 (idiosoma length 397–417) in female, 218 (idiosoma length 375) in male. Ratio of gnathosoma to idiosoma 0.56–0.65. Ratio of P-2 to P-1 3.70–4.40. Remarks. The species was originally described by Hodge (1863) under the name of Leptognathus falcatus. Trouessartella falcata Lohmann, 1901 and Leptognathus marinus Lohmann, 1889 are equivalent to this species. This species has very long rostrum and palpi. In the male, the genital foramen is surrounded by a dense corona of more than 60 Pgs and flanked by 4 or 5 pairs of outlying setae. Female, male, DN, PN, and LV are known. L. falcata beringi was described by Newell (1951b) as a subspecies of L. falcata on the basis of female specimens collected from calcareous algae at intertidal zone and sands and gravels at a depth of 39.6 m at Attu Is., St. Paul Is., Umnak, Adak, Aleutian Passes, and Wainwright in USA (Newell 1951a, b; Bartsch 1977b). This species is different from L. falcata in having heavier palpi and Lc I–IV with delicate accessory teeth. Bartsch (2003b) suggested that this subspecies could be raised to a species rank, L. beringi, including specimens recorded as L. falcata from Gulf of Anadyr and the Kuril Is. by Makarova (1976, 1977, 1978). However, the discrimination is based only on quantitative characters. Further consideration based on the ... |
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