Ericthonius brasiliensis
Creators: name: Sir, Sally J.
name: White, Kristine N.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ischyroceridae
Ericthonius
Ericthonius brasiliensis

description: Ericthonius brasiliensis (Dana, 1853)
Figs 8, 31 H
Pyctilus brasiliensis Dana, 1853: 976, fig. 5 a – h.
Erichthonius brasiliensis: Bousfield 1973: 195, pl 59, fig. 2; Myers 1982: 200, 201, figs 136, 137; Myers and McGrath 1984: 382–385, figs 1, 2; Thomas 1993: 49, fig. 6; LeCroy 2007: 561, fig. 483.
Material examined.
Panama • 1.8–5.7 mm • 1 ♂; Bocas del Toro, Crawl Caye; 9.2504°N, 82.1316°W; depth 10 m, among coral rubble and red sponge; 7 Aug 2005; S. DeGrave, M. Salazar leg.; GCRL 6663 • 3 ♂, 2 ♀; Bocas del Toro, Hospital Point; 9.3048°N, 82.1316°W; depth 1.5 m, among sponges, coral rubble, and sand; 7 Aug 2005; T. A. Haney leg.; GCRL 6664 • 1 ♂, 5 ♀; Bocas del Toro, 100 m west of STRI dock; 14 m; 8 Aug 2005; T. A. Haney leg.; GCRL 6665 • 1 ♂, 1 ♀; Bocas del Toro, Isla San Cristobal; 9.2625°N, 82.1897°W; depth 0.2 m, 9 Aug 2005; S. LeCroy leg.; GCRL 6666 • 6 ♀; Bocas del Toro, Crawl Caye; 9.2376°N, 82.1438°W; depth 1.5–3 m, among Halimeda, 11 Aug 2021; K. N. White leg.; USNM 1743951 • 1 ♂, 1 ♀; Bocas del Toro, Crawl Caye; 9.2459°N, 82.1369°W; depth 1–4 m; 25 June 2023; K. N. White leg.; USNM 1743952 • 11 ♂, 17 ♀; Bocas del Toro, Hospital Point; 9.3333°N, 82.2185°W; depth 11 m, from buoy scrapings, 26 June 2023; K. N. White leg.; USNM 1743955 • 1 ♀; Bocas del Toro, Swan Cay; 9.4536°N, 82.3000°W; 27 June 2023; K. N. White leg.; USNM 1743956 • 3 ♀; Bocas del Toro, Cayo Zapatilla; 9.2699°N, 82.0587°W; depth 10–11 m; 28 June 2023; K. N. White leg.; USNM 1743953 • 4 ♂, 6 ♀; Cayo Zapatilla, Bocas del Toro; 9.2699°N, 82.0587°W; depth 0 m, in sand; 29 June 2023; K. N. White leg.; USNM 1743954 • 1 ♂; Crawl Caye, Bocas del Toro; 9.2502°N, 82.1318°W; depth 5–13 m, among coral rubble; 29 June 2023; K. N. White leg.; USNM 1743957.
Diagnosis.
Male gnathopod 1 basis widely expanded posterodistally. Coxa 2 anteroventral margin rounded, with vertical stridulating ridges, without long plumose setae. Male gnathopod 2 carpus anterodistal margin with two large distal projections. Coxa 3 evenly rounded distally, basis strongly expanded anterodistally. Pereopod 4 basis strongly expanded. Male pereopod 5 basis not produced into wing-like projection. Uropod 3 ramus slender.
Distribution.
Brazil: Rio De Janeiro (Dana 1853); U. S. A.: Cape Cod to Chesapeake Bay, Florida, Gulf states (Bousfield 1973); Italy: Thau, Napoli, Venezia, Lipari-Castello, Messina, Bosporus (Myers 1982); France: Banyuls-sur-Mer (Myers 1982); Cosmopolitan (Thomas 1993; LeCroy 2007); Panama: Bocas del Toro (present study).
Ecology and remarks.
This species occurs among coral rubble, red sponges, sand, and from buoy scrapings at depths of 0– 11 m. Variation between Panamanian specimens has been seen in the following characters: size of posterior hump on basis; male gnathopod 2 basis posterior margin with fewer setae than previously described; uropod 3 more setose than previously described; color pattern (possibly due to differences in preservation). Variation within this species is further discussed in Myers and McGrath (1984). Panamanian specimens agree closely with specimens described by Bousfield (1973). Live specimens have brown stripes covering entire body with a red eye.
description: Published as part of Sir, Sally J. & White, Kristine N., 2025, Caribbean Amphipoda (Crustacea) of Panama. Part IV: parvorder Caprellidira, pp. 151-205 in ZooKeys 1234 on pages 151-205, DOI: 10.3897/zookeys.1234.145826