Diversity and distribution of North Atlantic Lepechinellidae (Amphipoda: Crustacea) Author Lörz, Anne-Nina Author Brix, Saskia Author Jażdżewska, Anna M. Author Hughes, Lauren Elizabeth text Zoological Journal of the Linnean Society 2020 2020-04-25 190 1095 1122 https://academic.oup.com/zoolinnean/advance-article/doi/10.1093/zoolinnean/zlaa024/5825067 journal article 3321 10.1093/zoolinnean/zlaa024 590e6ac1-bd84-4bac-9d7b-6478be745a4b 0024-4082 5722220 LEPECHINELLA CHRYSOTHERAS STEBBING, 1908 Lepechinella chrysotheras Stebbing, 1908: 191–193 , pl. 27. — K.H. Barnard, 1925: 356–357. — Stephensen, 1944: 19. — J. L. Barnard, 1973: 14 . — Barnard & Karaman, 1991: 269 . Type locality: North Atlantic , North Sea (between Orkney Islands and Shetland Islands ), 59°041’N , 3°08’W , 850 m . Figure 2. Lepechinella arctica , 8.3 mm, DZMB-HH 56230, Station 879, Faeroe Island Ridge, mandible, maxilla 1, labrum, maxilliped and telson. Scale bar 1 mm. Figure 3. Lepechinella arctica , size versus morphotype for lepechinellids collected at IceAGE station 879 small specimens in group A, single carina, telson no lateral setae; B, specimens exceeding 6 mm body length: double carina, telson with lateral setae; C specimens having COI and 16S sequences confirming species affiliation. Remarks: Lepechinella chrysotheras is not encountered in the samples from IceAGE expeditions. This species is only known from the holotype of Stebbing (1908) and three additional male specimens listed by Stephensen (1944) . There are currently no reported female specimens of L. chysotheras . Stebbing (1908) does not list the institution where the type material is deposited and, unfortunately, no type material for L. chrysotheras was located at the NHM, London, which was the main repository of Stebbing’s personal collection. Stebbing (1908) cited material as collected in the ‘North Sea’, by the RV Goldseeker , but this is a historic use of the name North Sea, as in more recent times, the term ‘North Sea’ is restricted to the region between the United Kingdom and the European mainland. Most importantly, the type locality listed in the formal taxonomic description of the species is given only as latitude and longitude coordinates. Following these coordinates, the collection locality is positioned between the Orkney Islands and the Outer Hebrides , hence outside the modern definition of the North Sea (a technical, but critical point in assessing regional listings and geographic species ranges). Table 5. Mean intraspecific distance (based on haplotypes) of COI and 16S sequences of studied species. associated with the presence of ambiguous nucleotides in the sequences. When these sites are removed,

COI	16S
No of seq.	No of haplotypes	p-distance	K2P	No of seq.	No of haplotypes	p-distance	K2P
Lepechinella arctica	14	2	0.002	0.002	10	6 (1)	0.000	0.000
Lepechinella victoriae	2	2	0.006	0.007	3	2	0.003	0.003
Lepechinella grimi	1	1	NA	NA	2	2	0.006	0.006
Lepechinella skarphedini	1	1	NA	NA	1	1	NA	NA
Lepechinelloides karii	2	1	0.000	0.000	0	NA	NA	NA

Depth range: 850 to 900 m . Distribution: North Atlantic, between Orkney Islands and Shetland Islands ( Stebbing, 1908 ), South of the Faeroes ( Stephensen, 1944 ) ( Fig. 9B ; Tables 1 , 2 ).