Petrolisthes donadio Hiller & Werding, 2007

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 : 75-78

Petrolisthes donadio Hiller & Werding, 2007

( Figs. 42 , 45A–C , 89D )

Petrolisthes donadio Hiller & Werding 2007: 186 , figs. 4–6; Lazarus-Agudelo & Cantera-Kintz 2007: 229; García-Madrigal & Andréu-Sánchez 2009: 33.

Material examined. Panama [Pacific]: 1 male, cl 3.4, cw 3.0, 1 female, cl 6.2, cw 6.2 ( FLMNH UF 57140 ), 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-048); 1 ov. female, cl 10.7, cw 10.1 ( FLMNH UF 57711 ), 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-146); 1 female, cl 11.9, cw 12.5 ( MZUSP 33526 ), Las Perlas Is ., Isla Contadora, Playa Sueca, rocky intertidal, under rocks and in rock crevices, leg. J. Luque & A.R. Palmer, 17.04.2015; 1 ov. female, cl 10.1, cw 10.3 ( MZUSP 33891 ), same collection data as for previous specimen; 1 male, cl 13.8, cw 13.4 ( FLMNH UF 57141 ), Las Perlas Is ., Isla Contadora , north of Playa Larga, 8°37’59.4”N, 79°01’52.9”W, rocky reef, low tide, under rocks, leg. P.P.G. Pachelle & M. Leray, 22.03.2019 (fc PP 19-051); 1 male, cl 15.5, cw 15.9 ( FLMNH UF 57142 ), same collection data as for previous specimen (fcn PP 19-058); 1 male, cl 11.7, cw 11.7 ( MZUSP 33682 ), Punta Mala, rocky intertidal, low tide, under rocks, leg. A. Anker & J.F. Lazarus-Agudelo, 21.03.2015; 1 ov. female, cl 8.1, cw 8.3 ( MZUSP 33783 ), same collection data as for previous specimen. Extra-limital material . Colombia [Pacific]: 1 male, cl 12.4, cw 13.0 (CERBMcr-UV:2009-108), Bahía Málaga , Islote Morro Chiquito off Juanchaco, 03°55’20,9’’N, 77°20’54,7’’W, depth 3 m, rock-sand bottom, leg. A. Anker, 28.04.2009 (fcn COL-294) .

Previous records from Panama. Hiller & Werding (2007).

Distribution. East Pacific: Mexico, Costa Rica, Panama (Coiba Is., Secas Is., Punta Mala, Ciudad de Panamá, Taboga Is., Las Perlas Is., Bahía Piña in Darién), Colombia and Ecuador ( Hiller & Werding 2007; present study).

Ecology. Intertidal and subtidal, known depth range 0–30 m; on rocky and mixed rock-rubble-sand bottoms, typically under large rocks or in crevices of coral rubble and dead corals, sometimes among sponges or under sea urchins ( Hiller & Werding 2007; present study).

Remarks. According to Hiller & Werding (2007), the main morphological differences between P. donadio and the closely related P. edwardsii are: (1) the presence of a supraocular spine (absent in P. edwardsii ); (2) the distomesial margin of the basal antennular article armed with prominent sharp teeth (vs. with much smaller teeth, further diminishing in size distomesially, in P. edwardsii ); (3) the lateral margin of the P1 propodus less convex; (4) the P1 somewhat slenderer than in P. edwardsii ; and (5) the P2–P4 propodi significantly longer than in P. edwardsii . Additionally, the two species differ by their colour patterns, especially by the colouration of the dorsal surface of the P2–P4 propodi, which are pink to red-orange bordered by two bluish bands in P. donadio ( Fig. 42A ) vs. banded or mottled with dark violet-purple in P. edwardsii ( Figs. 43A , 44A ). Additional colour pattern differences can be observed in the colouration of the antennular peduncle and distal articles of Mxp3 ( Fig. 45 ).

Remarkably, the P2–P4 propodi of the specimens reported and illustrated by García-Madrigal & Andréu- Sánchez (2009: fig. 5B, C) under the name P. sanfelipensis Glassell, 1936 have the characteristic colour pattern (“blue-red-blue socks”) of P. donadio . Glassell (1936) described the colour of P. sanfelipensis as “a faint pinkish tint, … when freshly preserved in alcohol is beautifully colored with rich reds and purple”, which hardly matches the colour pattern of the specimens of García-Madrigal & Andréu-Sánchez (2009), which also differ from P. donadio in displaying a row of three conspicuous white spots along the dorsal side of the cutting edge of the P1 pollex. Both of these colour characteristics are present in the specimens recently collected in Nayarit, Mexico, which are currently being studied by the authors.

Figures

FIGURE 42. Petrolisthes donadio Hiller & Werding, 2007: A–C, ovigerous female (cl 10.7 mm, cw 10.1 mm) from Coiba Island, Panama (FLMNH UF 57711), dorsal (A), ventral (B) and frontal (C) views [photographs by AA].

FIGURE 43. Petrolisthes edwardsii (Saussure, 1853): A–C, male (cl 15.1 mm, cw 15.7 mm) from Coiba Island, Panama (FLMNH UF 57143), dorsal (A), ventral (B) and frontodorsal (C) views [photographs by AA].

FIGURE 44. Petrolisthes edwardsii (Saussure, 1853): A, B, ovigerous female (cl cw indet.) from Taboga Island, Panama (not deposited), dorsal (A) and ventral (B) views [photographs by AA].

FIGURE 45. Comparison of anterior regions of Petrolisthes donadio Hiller & Werding, 2007 [A–C] and Petrolisthes edwardsii (Saussure, 1853) [D –F]: A–C ovigerous female (cl 10.7 mm, cw 10.1 mm) from Coiba Island, Panama (FLMNH UF 57711); D–F, male (cl 15.1 mm, cw 15.7 mm) from Coiba Island, Panama (FLMNH UF 57143); A, D, frontal region of carapace, antennules and Mxp3, dorsal view; B, E, Mxp3 and antennules, ventral view; C, F, frontal region with Mxp3 and other mouthparts, frontal view [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)].