Pseudorchestoideinae

• Main Authors: Myers, A. A., Lowry, J. K.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Lowry; Myers; Pacific; North Atlantic
• Online Access: https://zenodo.org/record/3846938; https://doi.org/10.5281/zenodo.3846938

Pseudorchestoideinae subfam. nov. Type genus. Pseudorchestoidea Bousfield, 1982. Included genera (6). Americorchestia Bousfield, 1991; Asiaorchestia Lowry & Myers, 2019a; Britorchestia Lowry & Bopiah, 2012; Persianorchestia Momtazi, Lowry & Hekmatara, 2017; Pseudorchestoidea Bousfield, 1982; Sardorchestia Ruffo in Tafani et al., 2004. Category. Mascupods. Ecological type. Sand-hoppers. Distribution. Persian Gulf; Pacific South and Central America; Indonesia and Malaysia; East Atlantic and Mediterranean; Western North Atlantic. Diagnostic description. Antenna 1 short, not reaching midpoint of peduncular article 5 of antenna 2. Maxilliped palp article 2 with distomedial lobe; article 4 reduced, button-shaped or fused to article 3 . Gnathopod 1 posterior margin of carpus and propodus each with lobe covered in palmate setae; propodus subrectangular. Gnathopod 2 subchelate. Pereopods 3–7 cuspidactylate. Pereopod 4 dactylus amplidactylate. Pereopod 5 dactylus not inflated or inflated. Pereopod 6 subequal in length to pereopod 7. Pereopod 7 not sexually dimorphic. Epimera 1–3 slits absent. Uropods 1–2 rami with apical spear-shaped setae . Uropod 1 male exopod not sexually dimorphic; exopod with marginal robust setae in one row or with marginal robust setae in two rows or without marginal robust setae. Uropod 3 ramus subequal in length, longer than or shorter than peduncle. Telson with apical and marginal robust setae, with 3 to at least 10 robust setae per lobe. Remarks. Pseudorchestoideini is defined by the unusual spear-shaped apical setae on the rami of uropods 1 and 2. The group follows the ancient southern Laurasian coastline from tropical America through the Mediterranean Sea, the Persian Gulf to Vietnam. Published as part of Myers, A. A. & Lowry, J. K., 2020, A phylogeny and classification of the Talitroidea (Amphipoda, Senticaudata) based on interpretation of morphological synapomorphies and homoplasies, pp. 281-310 in Zootaxa 4778 (2) on page 306, DOI:10.11646/zootaxa.4778.2.3, ...