Intraspecific variation in megalopae of <i>Clibanarius antillensis</i> (Anomura, Diogenidae) among western Atlantic populations

The objective of this study was to describe the morphology of Clibanarius antillensis Stimpson, 1859 megalopae collected in the vicinity of Isla Sacrificios, Mexico, and compare it to previous descriptions originated from Brazilian and Panamanian specimens raised in laboratory conditions. We found four meristic differences between the Brazilian and the Panamanian and Mexican populations with the Brazilian population: the outer flagellum of antennule in the Panamanian and Mexican populations has more aesthetascs on the second, third, and fourth segments of the outer flagellum (0, 6, 5, 3, 0) than the Brazilian population (0, 4, 4, 2, 0); the maxilla has more setae on the scaphognathite in the Brazilian specimens (70) than in the Mexican and Panamanian specimens (49-62); the crista dentata of the third maxilliped is formed by only three denticles in the Brazilian specimens, while 4 or 6 denticles form the same structure in the Panamanian and Mexican populations; there are fewer number of setae on the endopod of the uropod in the Brazilian population. The differences may be explained by intraspecific variation.

KEYWORDS
Crustacea; Anomura; interspecific variation; megalopa stage; taxonomy

Authorship

Sergio Cházaro-Olvera

Laboratorio de Crustáceos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Av. de los Barrios No.1, Los Reyes Iztacala, C.P. 54090, Tlalnepantla, Estado de México, México. SCO E-mail: chazaro@campus.iztacala.unam.mx JAHL E-mail: RoyRogers032@hotmail.comUniversidad Nacional Autónoma de MéxicoMexicoTlalnepantla, Estado de México, MexicoLaboratorio de Crustáceos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Av. de los Barrios No.1, Los Reyes Iztacala, C.P. 54090, Tlalnepantla, Estado de México, México. SCO E-mail: chazaro@campus.iztacala.unam.mx JAHL E-mail: RoyRogers032@hotmail.com

http://orcid.org/0000-0002-0667-0043

Rafael Robles

Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Campeche. Humberto Lanz Cárdenas y Fracc. Ecológico Ambiental Siglo XXIII, Colonia Exhacienda Kalá, CP. 24085, San Francisco de Campeche. Campeche, México. RR E-mail: roblesrafaelr@gmail.comUniversidad Autónoma de CampecheMexicoSan Francisco de Campeche, Campeche, MexicoFacultad de Ciencias Químico Biológicas, Universidad Autónoma de Campeche. Humberto Lanz Cárdenas y Fracc. Ecológico Ambiental Siglo XXIII, Colonia Exhacienda Kalá, CP. 24085, San Francisco de Campeche. Campeche, México. RR E-mail: roblesrafaelr@gmail.com

http://orcid.org/0000-0003-0531-5557

Jesús Montoya-Mendoza

Laboratorio de Investigación Acuícola Aplicada, Tecnológico Nacional de México, Instituto Tecnológico de Boca del Río (ITBOCA), Carretera Veracruz-Córdoba Km 12, Boca del Río, Boca del Río, CP. 94290. Veracruz, México . JMM E-mail: jesusm_montoya@yahoo.com.mx Instituto Tecnológico de Boca del RíoMexicoBoca del Río, Veracruz, MexicoLaboratorio de Investigación Acuícola Aplicada, Tecnológico Nacional de México, Instituto Tecnológico de Boca del Río (ITBOCA), Carretera Veracruz-Córdoba Km 12, Boca del Río, Boca del Río, CP. 94290. Veracruz, México . JMM E-mail: jesusm_montoya@yahoo.com.mx

http://orcid.org/0000-0002-7598-7300

Josué Abraham Herrera-López

http://orcid.org/0000-0003-0212-1212

Corresponding author
: Sergio Cházaro-Olvera. Email: chazaro@campus.iztacala.unam.mx

2
Disclosure Statement: No potential conflict of interest was reported by the authors.

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (3)
Tables (2)

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Figure 1
Sampling station northwest off Sacrificios Island (*), Sistema Arrecifal Veracruzano.

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Figure 2
Light traps for collecting megalopae of Clibanarius.

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Figure 3
Clibanarius antillensis. Megalopa: A, dorsal view; B, antennula; C, antenna; D, mandible; E, maxillula; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3; J, cheliped; K, second pereiopod; L, third pereiopod; M, fourth pereopod; N, fifth pereopod; O‒R, pleopods of abdominal somites; S, telson and uropods. Scale bars: A = 1.0 mm, B‒S = 0.1 mm.

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Table 1
Abundance ofClibanariusspecies in the sampling area.

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Table 2
Comparison of relevant megalopae features ofClibanarius antillensis, collected from a Mexican population to those obtained in laboratory conditions from Brazilian (Bra) (Brossi-Garcia and Hebling, 1983Brossi-Garcia, A.L. and Hebling, N.J. 1983. Desenvolvimento pós-embrionário de Clibanarius antillensis Stimpson, 1859 (Crustacea, Diogenidae), em laboratório. Boletim de Zoologia, 6: 89-111. ) and Panamanian (Pan) populations (Siddiqui et al., 1991Siddiqui, F.A.; McLaughlin, P.A. and Crain, J.A. 1991. Larval development of Clibanarius antillensis Stimpson, 1859 (Crustacea: Anomura: Diogenidae) reared under laboratory conditions: A comparison between Panamanian and Brazilian populations. Journal of Natural History, 25: 917-932.). The same features are compared toC. sclopetariusandC. vittatuscollected in the same area (¹, Brossi-Garcia, 1987Brossi-Garcia, A.L. 1987. Morphology of the larval stages of Clibanarius sclopetarius (Herbst, 1796) (Decapoda, Diogenidae) reared in the laboratory. Crustaceana, 52: 251-275.; ², Lang and Young, 1977Lang, W.H. and Young A.M.1977. The larval development of Clibanarius vittatus (Bosc) (Crustacea: Decapoda: Diogenidae) reared in the laboratory. Biology Bulletin, 152: 84-104.; * obtained from the figure).

Figure 1 Sampling station northwest off Sacrificios Island (*), Sistema Arrecifal Veracruzano.

Figure 2 Light traps for collecting megalopae of Clibanarius.

Figure 3 Clibanarius antillensis. Megalopa: A, dorsal view; B, antennula; C, antenna; D, mandible; E, maxillula; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3; J, cheliped; K, second pereiopod; L, third pereiopod; M, fourth pereopod; N, fifth pereopod; O‒R, pleopods of abdominal somites; S, telson and uropods. Scale bars: A = 1.0 mm, B‒S = 0.1 mm.

Table 1 Abundance ofClibanariusspecies in the sampling area.

	Sampling time
Species	21:00	22:00	23:00	00:00	01:00	Total
Clibanarius antillensis	216	443	291	13	5	968
Clibanarius sclopetarius	327	211	86	25	7	656
Clibanarius vittatus	542	364	242	16	7	1171
Total	1085	1018	619	54	19	2795

Table 2 Comparison of relevant megalopae features ofClibanarius antillensis, collected from a Mexican population to those obtained in laboratory conditions from Brazilian (Bra) (Brossi-Garcia and Hebling, 1983Brossi-Garcia, A.L. and Hebling, N.J. 1983. Desenvolvimento pós-embrionário de Clibanarius antillensis Stimpson, 1859 (Crustacea, Diogenidae), em laboratório. Boletim de Zoologia, 6: 89-111. ) and Panamanian (Pan) populations (**Siddiqui et al., 1991Siddiqui, F.A.; McLaughlin, P.A. and Crain, J.A. 1991. Larval development of Clibanarius antillensis Stimpson, 1859 (Crustacea: Anomura: Diogenidae) reared under laboratory conditions: A comparison between Panamanian and Brazilian populations. Journal of Natural History, 25: 917-932.). The same features are compared toC. sclopetariusandC. vittatuscollected in the same area (¹, Brossi-Garcia, 1987Brossi-Garcia, A.L. 1987. Morphology of the larval stages of Clibanarius sclopetarius (Herbst, 1796) (Decapoda, Diogenidae) reared in the laboratory. Crustaceana, 52: 251-275.; ², Lang and Young, 1977**Lang, W.H. and Young A.M.1977. The larval development of Clibanarius vittatus (Bosc) (Crustacea: Decapoda: Diogenidae) reared in the laboratory. Biology Bulletin, 152: 84-104.; * obtained from the figure).

Feature	C. antillensis (Bra)	C. antillensis (Pan)	C. antillensis (Mex)	C. sclopetarius ¹	C. vittatus ²
Total length (mm): antennule	2.50-2.60*	2.70-2.90	2.00-2.30	3.40-3.50*	3.20-4.10
Outer flagellum five segments/aesthetascs	0, 4, 4, 2, 0	0, 6, 5, 3, 0	0, 6, 5, 3, 0	0, 6, 5, 2, 0	0, 4, 4, 3, 0
Antenna flagellum: segments	10	10	10	10	11
Mandible: segments	2	2	2	3	3
Maxilla: scaphognathite setae	70	49-55	50-55	52	60
Second maxilliped: exopod setae	9	7-8	8	7	6-8
Third maxilliped: crista dentata denticles	3	5-6	4-6	4-5	‒
Uropod: endopod setae/scales	9-10/4	11-14/5-7	11-14/5-7	8-10/5-6	11-14/5-7
Uropod: exopod setae/scales	19-20/8-10	19-21/8-12	19-21/8-12	11-14/5-6	12-20/6-7

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Intraspecific variation in megalopae of <i>Clibanarius antillensis</i> (Anomura, Diogenidae) among western Atlantic populations

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[1] Corresponding author
: Sergio Cházaro-Olvera. Email: chazaro@campus.iztacala.unam.mx