Arenopontia riedli Lindgren, 1976

Sak, Serdar, Karaytuğ, Süphan & Huys, Rony, 2024, A revision of the genus Arenopontia Kunz, 1937 (Copepoda, Harpacticoida, Arenopontiidae), including the description of five new species, Zootaxa 5433 (1), pp. 1-50 : 10

Arenopontia riedli Lindgren, 1976

Arenopontia (Arenopontia) riedli Lindgren, 1976 : Bodin (1979: 124)

Original description. Lindgren (1976): 233–238; Figs 3–5 .

Type locality. U.S.A., North Carolina, near Morehead City, west of Ocean Steamer Pier on the oceanic side of Bogue Bank (76°50’00” W, 34°41’30” N); fully exposed high-energy sandy beach .

Material examined. None. According to Lindgren (1976) the type material of A. riedli was deposited in the National Museum of Natural History, Smithsonian Institution , Washington, D.C. but subsequent attempts to trace it failed ( T. C. Walter, pers. comm.) .

Remarks. This species [body length: 390 μm (♀), 350 μm (♂)] can readily be distinguished from its congeners by the most primitive armature on P2–P3 enp-2 ( Table 1 ). Lindgren (1976) stated that P1 exp-3 has “... three geniculate setae and one spine” but his illustration shows the typical armature for the genus, except that the innermost element is not penicillate (probably an oversight due to imperfect orientation). He also claimed that P1–P2 had an outer basal seta but his drawings prove otherwise, showing only the spinules typically found in this position. Lindgren (1976) found that there was little overlap in distribution within the beach between A. riedli and a closely related population, which he attributed to A. subterranea . The species is so far known only from its type locality in North Carolina where it is common in the coastal groundwater between mean sea level and mean low water mark.

Figures

FIGURE 3. Arenopontia anatolica sp. nov. (♀): (A) antennule, dorsal [two setae on segment 2 incomplete); (B) antenna; (C) free endopod of antenna; (D) mandible [inset: gnathobase viewed from different angle]; (E) maxillule; (F) maxilla; (G) maxilliped.

FIGURE 4. Arenopontia anatolica sp. nov. (♀): (A) P1, anterior; (B) P2, anterior; (C) P3, anterior; (D) P4, anterior.

FIGURE 5. Arenopontia anatolica sp. nov.: (A) anal somite and left caudal ramus ♀, dorsal; (B) posterior part of anal somite and left caudal ramus ♀, lateral; (C) P5 and genital field ♀, ventral; (D) antennule ♂, anterior; (E) left caudal ramus ♀, lateral.