Petrolisthes haigae Chace, 1962

Ferreira, Luciane Augusto De Azevedo & Anker, Arthur, 2021, An annotated and illustrated checklist of the porcelain crabs of Panama (Decapoda: Anomura), Zootaxa 5045 (1), pp. 1-154 : 91-95

Petrolisthes haigae Chace, 1962

( Fig. 54–56 , 89F )

Petrolisthes haigae Chace 1962: 620 , fig. 1; Haig 1968: 61; Gore & Abele 1976: 22; Gore 1982: 14; Werding & Haig 1982: 67; Hickman & Zimmerman 2000: 64, unnumbered colour photograph; Hiller et al. 2006: 553, 564; Lazarus-Agudelo & Cantera-Kintz 2007: 230; Moscoso 2012: 80, fig. 5E.

Petrolisthes marginatus . —Haig 1957: 10; Haig 1960: 25, 47, pl. 20, fig. 1 [not Petrolisthes marginatus Stimpson, 1859 ].

Petrolisthes sp. — Haig 1962: 177.

Material examined. Panama [ Pacific ]: 2 females, cl 2.5, cw 2.6 and cl 3.5, cw 3.3 ( FLMNH UF 57151 ), Coiba Is., off eastern coast of Isla Coiba , Isla Granito de Oro , Mona Lisa submerged rock, 7°35’39.9”N, 81°42’45.3”W, depth less than 8 m, in dead Pocillopora heads, leg. M. Leray et al., 18.02.2019 (fcn PAN-052); 1 female, cl 4.5, cw 4.3, 1 ov. female, cl 4.8, cw 4.6 ( FLMNH UF 57152 ), same collection data as for previous specimens (PAN-051); 1 male, cl 5.7, cw 5.5 ( FLMNH UF 57153 ), Coiba Is ., Isla de Afuera, 7°41’42.9”N, 81°38’08.6”W, rocky intertidal and adjacent subtidal with coral rubble and dead coral heads, in crevices of coral rocks, depth: 0–1 m, leg. A. Anker, 19.02.2019 (fcn PAN-102); 1 male, cl 5.7, cw 5.4 ( FLMNH UF 57154 ), same collection data as for previous specimen (fcn PAN-101); 1 male, cl 6.3, cw 5.9 ( FLMNH UF 57712 ) , Panama, Coiba Is ., Isla de Afuera, 7°41’49.1”N, 81°37’57.0”W, scuba diving, depth less than 8 m, in coral rubble ( Pocillopora ), leg. M. Leray et al., 22.02.2019 (fcn PAN-235); 1 ov. female, cl 5.7, cw 5.2 ( FLMNH UF 57713 ), same collection data as for previous specimen (fcn PAN-234); 1 ov. female, cl 5.7, cw 5.7 ( FLMNH UF 57155 ), Coiba Is ., Isla Coiba , northwest coast, small rocky island off Bahía Santa Cruz, 7°37’53.4”N, 81°46”44.9”W, rocky plateau, under rocks and in rock crevices, leg. M. Leray et al., 20.02.2019 (fcn PAN-141); 1 male, cl 5.5, cw 5.3 ( FLMNH UF 57714 ), Coiba Is ., Isla Coibita (Ranchería), STRI station docking area, 7°38’13.1”N 81°42’17.7”W, intertidal sandflat with rocks and rubble, low tide, under rock/rubble, leg. A. Anker & P.P.G. Pachelle, 23.02.2019 (fcn PAN-258); 1 female, cl 5.4, cw 5.3 ( MZUSP 40071 ), Punta Mala, rocky intertidal, low tide, under rocks, A. Anker & J.F. Lazarus-Agudelo, 21.03.2015; 1 ov. female, cl 8.2, cw 8.7 ( MZUSP 33889 ), Las Perlas Is ., Isla Contadora , Playa Cacique, rocky intertidal, under rocks and in rock crevices, leg. A. Anker, J. Luque, A.R. Palmer & T. Kaji, 16.04.2015; 2 ov. females, cl 6.5, cw 6.7 and cl, 6.9, cw 6.1 ( MZUSP 33892 ); Las Perlas Is ., Isla Bartolomé , rocky platform and adjacent sand-coral rubble bottom, depth 0–1 m, in crevices of rocks and dead corals, leg. A. Anker, J. Luque, A.R. Palmer & T. Kaji, 18.04.2015 .

Previous records from Panama. Haig (1968); Gore & Abele (1976).

Distribution. East Pacific: Clipperton I., Mexico, Costa Rica, Panama (Coiba Is., Bahía Honda in Veraguas, Punta Mala, Taboga Is., Las Perlas Is.), Colombia, Ecuador (including Galápagos) and Peru ( Haig 1968; Gore & Abele 1976; Gore 1982; Moscoso 2012; present study).

Ecology. Rocky and mixed rock-rubble-sand intertidal and shallow subtidal, often on rocky reefs rich in rocks encrusted by sponges and coralline algae, known depth range: typically 0–12 m, exceptionally 44 m; under rocks and coral debris, in crevices of dead coral heads (especially Pocillopora ) and other shelters ( Gore 1982; present study).

Remarks. Petrolisthes haigae was previously regarded as the probable eastern Pacific sister species of the amphi-Atlantic P. marginatus Stimpson, 1859 (= P. cessacii A. Milne-Edwards, 1878 ), differing from the latter by the carapace front broader and rounded (vs. narrower and oblong in P. marginatus ); the median frontal lobe shorter and broader (vs. more prominent and narrower in P. marginatus ); and the P1 robust, with the lateral margin of the propodus rounded (vs. slender, with the lateral margin of the propodus nearly straight in P. marginatus ) ( Ferreira & Tavares 2017). However, Hiller et al. (2006) recovered a sister relationship of P. haigae with P. hirtispinosus Lockington, 1878 , and not with P. marginatus .

The colour pattern of the Panamanian specimens of P. haigae is relatively homogeneous dorsally, however, presenting some variation on the ventral side ( Figs. 54–56 ). For instance, the colour of the ventral side of the P1 palms may vary from yellowish to intense pink-red ( Figs. 54B , 55B , 56C–E ). Noteworthy, the porcelain crab from Galápagos identified as P. haigae in the colour photograph in Hickman & Zimmerman (2000) is generally much darker and could represent at least a genetically isolated population.

Figures

FIGURE 54. Petrolisthes haigae Chace, 1962: A–C, male (cl 5.5 mm, cw 5.3 mm) from Coiba Island, Panama (FLMNH UF 57714), dorsal (A), ventral (B) and frontal (C) views [photographs by AA].

FIGURE 55. Petrolisthes haigae Chace, 1962: A, B, female (cl 5.4 mm, cw 5.3 mm) from Punta Mala, Panama (MZUSP 40071), dorsal (A) and ventral (B) views [photographs by AA].

FIGURE 56. Petrolisthes haigae Chace, 1962: A, ovigerous female (cl 5.7 mm, cw 5.2 mm) from Coiba Island, Panama (FLMNH UF 57713), dorsal view; B, C, male (cl cw indet.) from Taboga Island, Panama (not deposited), dorsal (B) and ventral (C) views; D, ovigerous female (cl cw indet.) from the same locality (not deposited), ventral view; E, male (cl cw indet.) from the same locality (not deposited) [photographs by AA].

FIGURE 89. Some eastern Pacific Porcellanidae (all species reported from Panama) photographed in situ: A, Pachycheles vicarius Nobili, 1901, Bahía Málaga, Colombia; B, C, Petrolisthes edwardsii (de Saussure, 1853), Los Cabos, Baja California, Mexico (B), and Malpelo Island, Colombia (C); D, Petrolisthes donadio Hiller & Werding, 2007, Malpelo Island, Colombia, near sea urchin, Diadema mexicanum Agassiz; E, Petrolisthes glasselli Haig, 1957, Malpelo Island, Colombia; F, Petrolisthes haigae Chace, 1962, Malpelo Island, Colombia [photographs courtesy of Juan-Felipe Lazarus-Agudelo (A, C–F) and Jeff Goddard (B)].