Hemiproto wigleyi McCain, 1968

Mauro, Fábio da Motta, Nascimento, Priscila Soares do & Serejo, Cristiana Silveira, 2020, New discoveries for the subfamily Phtisicinae Vassilenko, 1968 (Crustacea: Senticaudata) from the Brazilian coast, European Journal of Taxonomy 597, pp. 1-17 : 6

Hemiproto wigleyi McCain, 1968

Figs 1–2

Hemiproto wigleyi McCain, 1968: 65 , figs 31, 32C–E, 50.

Hemiproto wigleyi – McCain & Steinberg 1970: 51 . — Díaz et al. 2005: 24, fig. 15. — Winfield et al. 2006: 102. — LeCroy et al. 2009: 965. — Ortíz & Lalana 2010: 87. — Martin et al. 2013: 1703. — Winfield & Ortiz 2013: 167.

Diagnosis

Antenna 1 slightly smaller than body length, flagellum with nine articles, articles 2–3 much longer than article 1. Antenna 2 flagellum with four articles. Gill pairs on pereonites 2–4.

Material examined

BRAZIL – Espírito Santo Basin, ES • 1 ♂ (used for description); 21°2′45.42″ S, 40°32′28.74″W; 105 m; 6.26 mm; MNRJ 25515 • 1 juvenile; 18°52′31.22″ S, 39°8′42.51″W; 34 m; MNRJ 25512 • 8 ♂♂; 21°2′45.42″ S, 40°32′28.74″W; 105 m; MNRJ 25513 • 5 ♂♂; 20º11′25.35″ S, 40º2′16.02″ W; 39 m; MNRJ 25514 • 3 ♂♂; 20°12′19.99″ S, 39°57′59.47″W; 34 m; MNRJ 25516 .

Redescription

HEAD. Left mandible with 5-toothed incisor, 5-toothed lacinia mobilis, and two accessory plates, row of eight lateral setae; palp 3-articulate, last article setal formula 1–5–1. Right mandible with 5-toothed incisor, lacinia mobilis smooth, two accessory plates and a row of five slender setae; labium outer lobe wing-shaped, inner lobe small. Labrum apically acute. Maxilla 1 outer lobe with four robust apical setae, palp with six robust apical setae. Maxilliped palp second article with six lateral setae and two very small setae inserted at medium-lateral part, article 3 with distal row of five setae; distal article with three toothlike apical projections; outer plate serrate, four setae at top and one inserted at middle border; inner plate strongly serrate with pair of two pectinate acute projections at medial-distal apex, pair of robust setae on ventral-medial part.

THORAX. Gnathopod 1 carpus much longer than ischium and merus, expanding from middle, largest width at distal part; propodus with three proximal grasping setae, palm with about 12 small and robust setae, dactylus smooth. Gnathopod 2 carpus strongly elongate, propodus with two proximal grasping setae, proximal subquadrate indent, palm irregularly serrate, three times as long as wide; dactylus strongly serrate. Pereopods 3–4 merus longer than following articles, with two proximal robust setae, and serrate projections distally; dactylus smooth. Pereopods 5–7 missing.

ABDOMEN. One pair of small anterior pyriform, appendages; pair of lobes smooth and pair of very elongate posterior appendages, 1-articulate, with three proximal and three distal setae.

Distribution ( Figs 6–7 )

Type locality: Hancock Atlantic Expedition sta. A32-39, 3 miles N. Coche Island, Nueva Sparta, Venezuela, 35–60 m ( McCain 1968). Other localities: Atlantic Ocean: Fort Lauderdale, Florida; California ( McCain 1968); Santa Maria Basin region, Florida ( Watling 1997), Falcón, Venezuela ( Díaz et al. 2005), Gulf of Mexico ( LeCroy et al. 2009; Winfield et al. 2006, Winfield & Ortiz 2013), Caribbean Sea ( Ortíz & Lalana 2010; Martin et al. 2013). Brazil: Espírito Santo Basin, Brazil (present study). Depth range: 32–105 m ( Díaz et al. 2005; Ortíz & Lalana 2010; present study).

Figures

Fig. 1. Hemiproto wigleyi (McCain, 1968). Male, 8.36 mm, Campos Basin, RJ (MNRJ 25515). Scale bars: habitus = 0.5 mm; lb, lbr, mx1, mx2, mdb(l), mdb(r), mxp = 0.1 mm.

Fig. 2. Hemiproto wigleyi (McCain, 1968). Male, 8.5 mm, Campos Basin, RJ (MNRJ 25515). Scale bars: gn1, abd = 0.1mm; gn2, p3, p4 = 0.1 mm.

Fig. 6. World distribution of Phtisica marina Slabber, 1769 and Hemiproto wigleyi McCain, 1968.

Fig. 7. Distribution of Phtisica marina Slabber, 1769 (blue dots) and Hemiproto wigleyi McCain, 1968 (red dots) along the Brazilian coast. Abbreviations: BA = Bahia; ES = Espírito Santo; RJ = Rio de Janeiro; SP = São Paulo; PR = Paraná; SC = Santa Catarina.