Thor manningi Chace, 1972

Thor manningi Chace, 1972 View in CoL

( Fig. 3 View Figure 3 )

Thor manningi Chace, 1972: 130 View in CoL , 137, figs. 59–61; Birkeland et al., 1976: 138; Heck and Wetstone, 1977: 138; Carvacho, 1979: 464; Gore, 1981: 138, 152; Markham and McDermott, 1980: 1270; Carvacho, 1982: 18; Cubit and Williams, 1983:25; Williams, 1984: 134, 137, fig. 96; Bauer, 1985: 150, 152–158; Bauer, 1986: 11–13, 15, 19,23, 25, 27–29, figs. 1, 8,9,12; Martínez Iglesias, 1986: 5, 18, 19,fig. 9B; Young, 1986: 112; Manning and Chace, 1990: 24; Markham et al., 1990: 423; Bauer and VanHoy, 1996: 53–56, 61–71; Duarte and Nalesso, 1996: 143, 148; Hernández-Aguilera et al., 1996: 41; Christoffersen, 1998: 353; Álvarez et al., 1999: 7; Morgado and Tanaka, 2001: 177; Wicksten, 2005: 100, 107, fig. 7; Coelho Filho, 2006: 10 View Cited Treatment ; De Grave et al., 2006: 5363.2; Almeida et al., 2008: 23, 28, 38, figs. 2–3; Felder et al., 2009: 1059; Amaral et al., 2010: 249; De Grave and Fransen, 2011: 434; Almeida et al., 2012: 2 View Cited Treatment , 24, 26, 28, 35, app. II; De Grave and Anker, 2017: 33; Tavares et al., 2017: 157 View Cited Treatment , 162, 107–172, fig. 4C; Terossi et al., 2017: fig. 2, tab. S1; Mariño et al., 2018: 4–6; Terossi et al., 2018:79 View Cited Treatment , 87,fig.2; Romero-Rodríguez and Álvarez, 2020: 560, 561, 563, 565, 567, 568, fig. 1A.

Thor floridanus View in CoL — (?) Fausto-Filho, 1970: 56; (?)

Coelho and Ramos, 1972: 152;(?) Heck, 1977:338;

(?) Heck, 1979: 199; (?) Christoffersen, 1998: 353. Thor c. manningi — Rodríguez, 1980: 170, 171, fig. 49. Thornanningi — Young, 1986: 103 (misspelled). Thor cf. manningi — Fiedler et al., 2010: 5, fig. 1.

Material examined. Antigua and Barbuda: Male , holotype (prehensile, CL 1.3 mm), USNM 135393 About USNM , English Harbour , Antigua, from bottom of yacht anchored for several months, coll. D. V. Nicholson, Smithsonian-Bredin Expedition Sta 82-56, 04 April 1956 . Panama: 1 ovigerous female (CL 2.5 mm), UF 44457 (photo available), Bocas del Toro (09°13’58.8’’N 82°06’43.2’’W), colls. M. Leray, F. Michonneau and R. Lasley, 24 May 2016 GoogleMaps ; 1 ovigerous female (CL 1.93 mm), CCDB 6407 View Materials , Bocas del Toro (09°19.805’N 82°15.087’W), colls. F. Mantelatto et al., 02 August 2011 GoogleMaps . Brazil: Ceará — 2 males (1 prehensile and 1 male with appendix masculina, CL 1.4–1.6 mm), LIMCE-UFC 300 , Trairí, Mundaú, colls. PROBIO team, 14 March 2003 ; 1 ovigerous female (CL 2.0 mm), LIMCE-UFC 320 , Paracuru , coll. P.P.G. Pachelle, 23 September 2010 ; 1 male (prehensile) and 4 females (3 ovigerous) (CL 1.2–2.6 mm), LABOMAR 732, São Gonçalo do Amarante, Terminal Portuário do Pecém , coll. PROCAD team, 29 January 2010 . Pernambuco — 1 ovigerous female and 1 male with appendix masculina (CL 0.9–1.9 mm), DZ/ UFRGS 6849 View Materials , Cabo de Santo Agostinho, Praia de Suape , colls. G.L. Bochini, A.O. Almeida and G.O. Soledade, 26 May 2017 ; 2 males (1 prehensile and 1 with appendix masculina, CL 1.1–1.3 mm), DZ/ UFRGS 6850 View Materials , same location and colls., 26 June 2017 ; 1 female (CL 1.8 mm), DZ/ UFRGS 6851 View Materials , same location and colls., 23 August 2017 ; 1 female with breeding dress (CL 1.9 mm), DZ/ UFRGS 6852 View Materials , same location and colls., 28 August 2017 ; 2 ovigerous females (CL 2.0– 2.1 mm), DZ/ UFRGS 6853 View Materials , same location and colls., 29 March 2018 ; 2 females (CL 2.2–2.4 mm), DZ/ UFRGS 6832 View Materials , same location and colls., 21 March 2019 ; 2 females (CL 1.8–2.2 mm), DZ/ UFRGS 6833 View Materials , same location and colls., 21 March 2019 ; 1 male with appendix masculina (CL 1.3 mm), DZ/ UFRGS 6854 View Materials , Cabo de Santo Agostinho, Praia do Paraíso , 08°21’29.9”S 34°57’00.9”W, colls. G.L. Bochini, A.O. Almeida and G.O. Soledade, 26 April 2017 GoogleMaps . São Paulo — 1 male with appendix masculina and 5 females (3 ovigerous) (CL 1.1–2.7 mm, one dissected specimen), CCDB 2593 View Materials , Ubatuba, Praia Itaguá (23°26’59”S 045°01’49”W), coll. F.L. Mantelatto, 17 September 2008 GoogleMaps ; 1 ovigerous female (CL 2.2 mm), CCDB 1850 View Materials , Ubatuba, Praia Itaguá (23°26’59”S 045°01’49”W), colls. F.L. Mantelatto, I.C. Leone and R.C. Buranelli, 16 September 2010 GoogleMaps ; 3 males with appendix masculina and 4 females (3

ovigerous and 1 with breeding dress) (CL 1.8–2.1

mm), CCDB 2737 View Materials , Ubatuba, Praia Itaguá (23°26’59”S

045°01’49”W), colls. F.L. Mantelatto, R. Robles, M .

Terossi, I.C. Leone and N.M. Grilli, 22 February2011;

1 male with appendix masculina (CL 2.5 mm), CCDB

3840, Ilhabela, Praia do Engenho d’Água, colls. F.L. Mantelatto and E.C. Mossolin, 12 July 2006.

Additions to original description provided by Chace (1972). Telson 3 times longer than proximal width, with 3–6 pairs of dorsolateral spiniform setae (frequently 3 or 4 pairs). Acute stylocerite of variable length from reaching distal margin of second article of antennular peduncle to slightly exceeding distal margin of third article of antennular peduncle; inner flagellum overreaching outer flagellum; inner f lagellum slender and elongate; outer f lagellum stout, with dense row of aesthetascs. Antennal basicerite with two ventral teeth; carpocerite variable in length, reaching or slightly exceeding half-length of scaphocerite; antennal flagellum long, filiform, articulated slightly broader at base than tip.

Mandible asymmetrical ( Fig. 3A View Figure 3 ), molar process with serrated surface, incisor process with 5–6 teeth, palp absent.Maxillule ( Fig.3B View Figure 3 ) with distally truncated and undivided endopod, with distal simple seta; endite with upper lacinia broad, with somewhat acute distomedial angle, with numerous plumose setae and9 spiniform setae; lower lacinia slender, with numerous plumose setae distally. Maxilla ( Fig. 3C View Figure 3 ) with coxal endite distally truncated and bilobed basal endite slightly rounded, numerous plumose setae on both endites; short endopod, distally slender, free of setae; exopod (scaphognathite) well developed, rounded, slender terminal margin, with numerous plumose setae.

First maxilliped ( Fig. 3D View Figure 3 ) with coxal and basal endites similar in length, covered by numerous plumose setae; distal margin of coxal endite slightly rounded; distal margin of basal endite slightly concave on median region and rounded on tips; undivided endopod, slightly more slender distally, with some plumose setae on proximal region; exopod well developed and undivided, with some plumose setae on proximal region and numerous plumose setae on distal region; proximal and distal lobes of large epipod similar in width. Second maxilliped ( Fig. 3E View Figure 3 ) with protopodite with plumose setae; endopod with 4 articles, merus 5 times as long as dactylus, carpus 3 times as long as dactylus, propodus 12 times as long as dactylus, propodus and dactylus with numerous plumose setae; long,slender, undivided exopod, some plumose setae on proximal region and numerous plumose setae on distal region; podobranch on epipod. Third maxilliped ( Fig. 3F View Figure 3 ) overreaching antennular peduncle; antepenultimate article 0.9 times as long as ultimate article, proximal region with some plumose setae, distal region unarmed or with 1 papillose seta and0,1, 2, or 3 spiniform setae, with variable positions; penultimate article 0.3 times as long as ultimate article, with some simple and plumose setae;ultimate article with many simple and plumose setae, tip with 7 or 8 spiniform setae; exopod not reaching distal margin of antepenultimate article, with tuft of plumose setae on tip.

Pereopods without epipods.First pereopod of variable length, not reaching or exceeding half-length of scaphocerite; ischium with 1 or 2 spiniform setae on distal flexor region; merus with 1 or 2, rarely 3, spiniform setae on flexor proximal region; chela slender, fingers 0.6 times as long as palm, both with short setae on cutting edge and tufts of setae on lateral margin. Second pereopod, ischium with 2 or 3 simple and long setae on proximal flexor region; carpus subdivided into 6 articles, length ratio of carpal articles from proximal to distal2:2:4:2.5:1:2;chela slender, fingers0.8 times as long as palm, both with tufts of setae on lateral margin. Third pereopod, merus with 1 to 4 lateral spiniform setae on distal region, rarely unarmed or with 5 or 6 spiniform setae, tuft of setae on distal dorsal region; carpus with tip of dorsal region projected anteriorly; flexor region of propodus with 8 to 13spiniform setae, distal setae paired; dactylus 0.2 times as long as propodus, distally biunguiculate with 2 or3 spiniform setae on flexor margin in non-prehensile pereopod (females and non-functional males); absence or presence of 1 spiniform seta on prehensile pereopod (functional males).Fourth pereopod, merus with 1 to 3 spiniform setae on distal region, rarely 4, tuft setae on distal dorsal region; carpus with tip of dorsal region projected anteriorly; flexor region of propodus with 8 to 12 spiniform setae, distal setae paired; dactylus 0.2 times as long as propodus, distally biunguiculate with 2 or 3, rarely 1 or 4, spiniform setae on flexor margin. Fifth pereopod, merus unarmed or with 1 spiniform seta on distal region, tuft of setae on distal dorsal region; carpus with tip of dorsal region projected anteriorly; flexor region of propodus with 8 to12 spiniform setae, distal setae paired, some specimens with tuft of simple setae on distal region of flexor margin; dactylus 0.2 times as long as propodus, distally biunguiculate with 2 or 3, rarely 1 or 4, spiniform setae on flexor margin.

Type locality. Antigua and Barbuda, Antigua ,

English Harbour.

Distribution. Western Atlantic — USA (North Carolina, Florida), Bermuda, Mexico (Veracruz, Yucatán, Campeche, Quintana Roo), Cuba, Puerto Rico, British Virgin Islands, Anguilla, Saint Kitts and Nevis, Antigua and Barbuda, Guadeloupe, Dominica, Martinique, Saint Lucia, Grenada, Trinidad and Tobago, Curaçao, Honduras, Panama, Venezuela, Brazil (Seamounts of North Chain, Fernando de Noronha, Trindade Island, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Bahia, São Paulo). Central Atlantic — Ascension Island ( Chace, 1972; Birkeland et al., 1976; Markham and McDermott, 1980; Rodríguez, 1980; Gore, 1981; Carvacho, 1982; Martínez Iglesias, 1986; Young, 1986; Manning and Chace, 1990; Markham et al., 1990; Duarte and Nalesso, 1996; Hernández-Aguilera et al., 1996; Álvarez et al., 1999; Coelho Filho, 2006; De Grave et al., 2006; Almeida et al., 2008; 2012; Fielder et al., 2010; Tavares et al., 2017). Although Chace (1972) reported T. manningi from the Pacific coast of Mexico (Islas Tres Marias), those specimens were Thor algicola Wicksten, 1987 (see Wicksten, 1987).

Variations. The variations in the length of structures or number of spiniform setae of the pereopods did not show any relation with geographic distribution. The number of spiniform setae on the distal region of the merus of the third and fourth pereopods and on the telson dorsolateral surface may vary on each side of the body of the same specimen.