Hemioniscus Buchholz 1866

• Main Authors: Boyko, Christopher B., Williams, Jason D.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Hemioniscidae; Hemioniscus; Northern Norway; Alaska
• Online Access: https://doi.org/10.5281/zenodo.7781624; http://treatment.plazi.org/id/BE31101C9A7B8D6E5EBC2E8916FA9BAB

Hemioniscus Buchholz, 1866 (Fig 4K) = Leponiscus Giard, 1887 n. syn. Diagnosis: Cryptoniscus larva/male body tear-drop shaped with prominent cuticular striations. Head wider than long, oral cone directed anteriorly; eyes present. Antennule article 1 with 7 bluntly rounded teeth. Coxal plates with or without teeth. Pereopods 1 and 2 gnathopodal, 3–7 ambulatory; propodi of 3–5 quadrate distally, 6 and 7 tapering distally. Pleotelson with smooth evenly rounded distal margin. Mature females with anterior segments unmodified from cryptoniscus larval form; posterior segments fused into enlarged marsupium. Included species and subspecies: Hemioniscus anatifae (Giard, 1887) n. comb. H. balani balani Buchholz, 1866 (type species); H. balani japonica Ogawa & Matsuzaki, 1985; H. pagurophilus Williams & Boyko, 2006. Distributions: Hemioniscus anatifae n. comb. : Roscoff, Concarneau, and Wimereaux, France, intertidal (Giard 1887). Hemioniscus balani balani : Northern hemisphere: East Atlantic: (River Gironde, France to northern Norway, United Kingdom (Vader 1983; Arnott 2001); western Atlantic: Halifax, Nova Scotia, Canada (Crisp 1968); east Pacific: Alaska to Baja California Norte, Mexico (Cornwall 1955; Campos-González & Campoy-Favela 1987; Blower & Roughgarden 1989). Intertidal at all localities. Hemioniscus balani japonica : Futaba County, Fukushima Prefecture, Japan, intertidal (Ogawa & Matsuzaki 1985). Hemioniscus pagurophilus : Philippines, subtidal (<5 m) (Williams & Boyko 2006). Hosts: Cirripedia: Acrothoracica: Tomlinsonia mclaughlinae Williams & Boyko, 2006 ( H . pagurophilus , Philippines) (Williams & Boyko 2006). Cirripedia: Thoracica: Austrominius modestus (Darwin, 1854) ( H . balani balani , Norway) (Vader 1968); Balanus glandula Darwin, 1854 ( H . balani balani , east Pacific) (Blower & Roughgarden 1989); Chirona hameri (Ascanius, 1767) ( H . balani balani , Irish Sea) (Crisp 1968); Chthamalus challengeri Hoek, 1883 ( H . balani japonica , Japan) (Ogawa & Matsuzaki ...