Redescription of the fish-parasitic isopod Cymothoa ianuarii Schioedte &amp; Meinert, 1884 and further records of C.lexcisa Perty, 1833 and C. oestrum (Linnaeus, 1758) (Isopoda: Cymothoida: Cymothoidae) from Brazil

Ribeiro, Felipe Bezerra; Huber, Augusto Frederico; Araujo, Paula Beatriz

doi:10.11606/1807-0205/2021.61.09

Felipe Bezerra Ribeiro ²2E-mail: fbribeiro.bio@gmail.com

Universidade Federal do Rio Grande do Sul (UFRGS). Porto Alegre, RS, Brasil

https://orcid.org/0000-0002-8623-1576

Augusto Frederico Huber ³3E-mail: gutofh@yahoo.com.br

Universidade Federal do Rio Grande do Sul (UFRGS). Porto Alegre, RS, Brasil

https://orcid.org/0000-0002-4590-3049

Paula Beatriz Araujo ⁴4E-mail: pabearaujo@gmail.com

Universidade Federal do Rio Grande do Sul (UFRGS). Porto Alegre, RS, Brasil

https://orcid.org/0000-0002-7587-3936

²E-mail: fbribeiro.bio@gmail.com

³E-mail: gutofh@yahoo.com.br

⁴E-mail: pabearaujo@gmail.com

AUTHORS’ CONTRIBUTIONS

F.B.R. identified all specimens; F.B.R. and A.F.H. worked on illustrations and pictures; F.B.R., A.F.H., and P.B.A. wrote and reviewed the manuscript. All authors read and approved the final manuscript and consent to publication.

Edited by: Marcos Domingos Siqueira Tavares

Figures (6)
Tables (1)

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Figure 1
Cymothoa excisaPerty, 1833Perty, M. 1833. Delectus animalium articulatorum, quae in itinere per Brasiliam annis 1817-1820, jussu et auspiciis Maximiliani Josephi I. Bavariae regis augustissimi peracto, collegerunt Dr. J.B. Spix et Dr. C.F. Ph. de Martius. Monachii, Imprensis Editoris. (MCP 2996): (A) habitus dorsal view; (B) habitus ventral view; (C) habitus lateral view; (D) cephalon frontal view. Scale bar: A-C = 5 mm; D = 2.5 mm.

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Figure 2
Cymothoa ianuariiSchioedte & Meinert, 1884Schioedte, J.C. & Meinert, F.W. 1884. Symbolae ad Monographiam Cymothoarum Isopodum Familiae 4. Cymothoidae. Trib. II. Cymothoinae. Trib. III. Livonecinae. Naturhistorisk Tidsskrift, 3(14): 221-454. (UFRGS 6516): (A) habitus dorsal view (UFRGS 6516); (B) habitus ventral view (UFRGS 6516); (C) habitus lateral view (UFRGS 6516); (D) cephalon frontal view (UFRGS 6516); (E) pleotelson dorsal view (UFRGS 6520). Scale bar: A-C = 5 mm; D = 2.5 mm; E = 1 mm.

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Figure 3
Cymothoa ianuariiSchioedte & Meinert, 1884Schioedte, J.C. & Meinert, F.W. 1884. Symbolae ad Monographiam Cymothoarum Isopodum Familiae 4. Cymothoidae. Trib. II. Cymothoinae. Trib. III. Livonecinae. Naturhistorisk Tidsskrift, 3(14): 221-454.: (A) antennule (UFRGS 6516); (B) apical article of antennule (UFRGS 6516); (C) antenna (UFRGS 6516); (D) mandible (UFRGS 6515); (E) maxilulle (UFRGS 6520); (F) apex of maxillula (UFRGS 6520); (G) maxilla (UFRGS 6515); (H) maxilla distal portion (UFRGS 6515); (I) maxilliped with oostegite (UFRGS 6515); (J) maxilliped articles 2 and 3 (UFRGS 6515). Scale bar: A, C and D = 0.5 mm; E and G = 0.3 mm; B = 0.125 mm; F, H and J = 0.1 mm; I = 1 mm.

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Figure 4
Cymothoa ianuariiSchioedte & Meinert, 1884Schioedte, J.C. & Meinert, F.W. 1884. Symbolae ad Monographiam Cymothoarum Isopodum Familiae 4. Cymothoidae. Trib. II. Cymothoinae. Trib. III. Livonecinae. Naturhistorisk Tidsskrift, 3(14): 221-454. (UFRGS 6516): (A-G) pereopods 1-7; (H-J) pleopods 1-5 dorsal view; (M) uropod. Scale bar: E-G = 2 mm; A-D, H-J = 1 mm; D = 2.5 mm; M = 0.5 mm.

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Figure 5
Cymothoa oestrum (Linnaeus, 1758Linnaeus, C. 1758. Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Holmiae. Laurentius Salvius. ii, 824p.) (MCP 2999): (A) habitus dorsal view; (B) habitus ventral view; (C) habitus lateral view; (D) cephalon frontal view. Scale bar: A-C = 5 mm; D = 2.5 mm.

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Figure 6
Map with the records of Cymothoa excisa (▲), C. ianuarii (▄) and C. oestrum (●) in Brazil. Symbols in dark gray indicate literature records and white indicates new records. Abbreviations: PA = Pará; MA = Maranhão; PE = Pernambuco; SE = Sergipe; BA = Bahia; RJ = Rio de Janeiro; SP = São Paulo; SC = Santa Catarina.

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Table 1
Measurements (mm) of analyzed female specimens of Cymothoa spp.

Species	Measurements				Collection Number
	Body		Pleotelson
	Length	Width	Length	Width
Cymothoa excisa	23.4	9.8	4.1	8.3	MCP 2996
	12.1	5.7	2.8	4.5	MCP 2997
	9.5	4.6	2.2	3.2	MCP 2997
Cymothoa ianuarii	11.6	6.1	1.9	4.8	UFRGS 6515
	10.6	5.9	1.8	3.9	UFRGS 6515
	11.7	6.0	1.9	4.1	UFRGS 6515
	17.7	9.3	2.9	6.8	UFRGS 6516
.	14.4	8.5	2.4	5.6	UFRGS 6517
	12.2	6.9	2.0	4.0	UFRGS 6518
	11.4	6.2	2.3	3.9	UFRGS 6520
Cymothoa oestrum	22.8	10.9	4.6	7.4	MCP 2999

[1] ²E-mail: fbribeiro.bio@gmail.com

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Redescription of the fish-parasitic isopod Cymothoa ianuarii Schioedte & Meinert, 1884 and further records of C.lexcisa Perty, 1833 and C. oestrum (Linnaeus, 1758) (Isopoda: Cymothoida: Cymothoidae) from Brazil

Abstract