Ophioderma panamense Lütken, 1859,
Granja-Fernández, Rebeca, Pineda-Enríquez, Tania, Solís-Marín, Francisco Alonso & Laguarda-Figueras, Alfredo, 2020, Ophioderma hendleri sp. nov. (Echinodermata: Ophiuroidea: Ophiodermatidae) and its congeners from the Eastern Pacific, European Journal of Taxonomy 729, pp. 11-41: 24-27
treatment provided by
|Ophioderma panamense Lütken, 1859|
Figs 5View Fig E–J, 6; Table 1
Ophiura panamensis – Lyman 1865: 32–34. — Verrill 1867: 253–254. — Ives 1889b: 175.
Ophioderma panamensis – Ives 1889a: 76–77. — Koehler 1907: 282. — McClendon 1909: 35, fig. 1. — H.L. Clark 1913: 205; 1915: 300–301. — Campbell 1921: 2, fig. 1. — Caso 1951: 265–272, figs 25–28; 1962: 296, 302; 1979: 210, pl. 97–100; 1986: 225, 239, pl. 14–19. — Granja-Fernández et al. 2014: 132–134 View Cited Treatment , fig. 6a–f; 2015a: 41; 2015b: 95; 2017: 172, 174.
Ophioderma panamense – H.L. Clark 1915: 301–302; 1917: 443; 1940: 341–342. — Nielsen 1932: 327–330. — Ziesenhenne 1937: 227, 1955: 192–197. — Boolotian & Leighton 1966: 10, fig. 23. — Luke 1982: 33. — Solís-Marín et al. 2005: 128; 2013: 570. — Honey-Escandón et al. 2008: 63. — Alvarado et al. 2010: 48.
Ophiocryptus granulosus – Honey-Escandón et al. 2008: 63. — Cortés 2012:173. — Granja-Fernández & López-Pérez 2012: 363. — Bastida-Zavala et al. 2013: 367. — Solís-Marín et al. 2013: 569.
Radial shields naked, oval, small, and widely separated. Adoral shields covered by granules. Up to 12 arm spines, short and with a blunt tip. In vivo coloration: disc green, brown or grey mottled with red, orange or yellow; arms with transverse bands, lighter and darker.
PANAMA • 1 spec.; Panama; NHMD-107679.
See: Supplementary material.
DD = 21.9 mm; 5 arms, AL = 91.9 mm. Disc flat and pentagonal. Dorsal disc densely covered by rounded and small granules, granule density 61 mm-2; rubbed off in some areas. Radial shields naked, small, oval, and separated ( Fig. 5EView Fig). Ventral interradii covered with granules similar to those on dorsal side of disc ( Fig. 5FView Fig). Four genital slits on each interradius; proximal genital slits rounded and shorter than distal slits, in contact with distal part of oral shield and with 1 st LAP; distal genital slits elongated and surrounded by granules and numerous and imbricated scales next to lateral arm plates ( Fig. 5FView Fig).
Oral shields slightly broader than long, rounded triangular, with convex obtuse proximal angle, straight distal edge, obtuse lateral angles. Madreporite with a small, circular, and shallow depression located in distal part and larger than other oral shields. Adoral shields covered by granules, which are larger than those on rest of body. Jaws bear 7–8 papillae at each side: LyOs small, 1.5× as long as broad, angled upwards; AdShSp largest, rounded; 2°AdShSp a little larger and similar in shape to LOPa; LOPa 3–4 conical and pointed, separated; IPa similar and separated from LOPa; TPa 1–2 at jaw tips, robust and pointed, larger and more robust than LOPa, widely separated. vT similar in shape but slightly larger than TPa. OPRSp 1, large and pointed at each side, visible within buccal cavity. Granules covering oral plates, larger than those on dorsal disc and interradii ( Fig. 5GView Fig).
Dorsal base of arms covered by granules and with approximately 15 scales laterally at dorsal arm plates. Dorsal arm plates 3× broader than long, overlapping and with an irregular to straight proximal and distal margin, with rounded lateral edges; a few dorsal arm plates can be fragmented in 2 pieces ( Fig. 5HView Fig). First ventral arm plate small, broader than long; with a small indentation distally ( Fig. 5GView Fig). Subsequent ventral arm plates quadrangular, slightly broader than long; distal edge slightly concave ( Fig. 5IView Fig). Paired and rounded pores between 1 st and 2 nd, and 2 nd and 3 rd ventral arm plates ( Fig. 5View Fig F–G). LAP with up to 8–9 arm spines. Arm spines with blunt tip and robust; length approximately ½ of size of LAP. Dorsalmost arm spine shortest and narrowest; ventralmost arm spine longest and slightly more robust, in contact with tentacle scale of succeeding joint ( Fig. 5IView Fig). Two tentacle scales; adradial tentacle scale ovoid, elongated, approximately half length of ventral arm plate; abradial tentacle scale slightly shorter, subtriangular ( Fig. 5IView Fig).
Color pattern beige in ethanol, likely faded ( Fig. 5JView Fig).
Specimen analyzed: 1 spec., ICML-UNAM 3.18.60 (DD = 11.1 mm, AL = 44.4 mm). Radial shield (external view) irregularly rounded, with an indented proximal margin, an incised abradial edge with a projection, an indented distal edge, and convex adradial margin, it is bordered by 7 pores on median to proximal margin (which are covered/overlapped by disc scales and granules in intact animal) ( Fig. 6AView Fig). Only exposed surface is domed center portion of radial shield. Outer surface of stereom is an open mesh of pores and knobs ( Fig. 6AView Fig). Dorsal arm plate somewhat rectangular, 3× as wide as long; proximal margin convex to straight, and distal margin straight, 7 spurs on proximal portion of external surface ( Fig. 6BView Fig). Ventral arm plate as long as wide, quadrangular with proximal side truncated and with a pointed-shape spur, lateral sides concave forming border of a small tentacle pore, and distally indented ( Fig. 6CView Fig). LAP D-shaped, 3× as high as wide, with 8 spine articulations sunken in notches of distal edge ( Fig. 6View Fig D–E). Ventral portion of LAP projecting ventro-proximalwards and ventro-distal tip projecting ventralwards ( Fig. 6DView Fig). Proximal edge of LAP with 2 prominent and elongated spurs, which are protruding and modify central-proximal edge ( Fig. 6DView Fig); between spurs and across remaining proximal margin a discernible band of different stereom structure is present ( Fig. 6DView Fig). Outer surface finely meshed with relatively large rounded stereom knobs ( Fig. 6GView Fig). Inner surface of LAP with a continuous ridge on proximal edge, and on ventro-distal margin with 2 spurs matching those on external surface ( Fig. 6FView Fig), and 4 pores in center. Spine articulations ventralwards increasing in size ( Fig. 6EView Fig). Lobes with a weak sigmoidal fold, tilted, and curved ( Fig. 6HView Fig). Ventral lobe smaller than dorsal lobe ( Fig. 6HView Fig). Proximal vertebrae ( Fig. 6IView Fig) almost oval, as wide as long, with large aboral muscle flange and smaller oral muscle flange. Distal face of vertebrae with large muscle flanges, with typical zygospondylous articulation ( Fig. 6JView Fig). Tentacle scale longer than wide, with a scale-like surface ( Fig. 6KView Fig). Spines with a scale-like surface, a blunt tip, and laterally flattened ( Fig. 6LView Fig). Dental plate consists of several pieces, 1 st piece bears 2 TPa and a single wide tooth, while rest of pieces with a single tooth socket per piece (4 in total), none of sockets penetrate plate ( Fig. 6MView Fig).
Habitat and distribution
USA (California), Mexico (Baja California, Gulf of California, Nayarit, Jalisco, Colima, Michoacán, Guerrero, Oaxaca, Marías Islands, Marietas Islands, Revillagigedo Islands), El Salvador, Nicaragua, Costa Rica (Caño Island, Cocos Island, Murciélagos Islands), Panama, Colombia, Ecuador (Galapagos Islands), and Peru ( Solís-Marín et al. 2013; Granja-Fernández et al. 2014). From intertidal to 20 m depth ( Solís-Marín et al. 2013). Found under rocks and in rubble, coral, sand, algae, and tide pools ( Maluf 1988; Granja-Fernández et al. 2014).
Lütken (1859) did not designate any specific type material in his description of O. panamense , but according to the International Code of Zoological Nomenclature ( ICZN 1999), Article 73.1.2, the only specimen reported in the original description (NHMD-107679) must be treated as holotype by monotypy. The description provided by Lütken (1859) is mostly based on the comparison of this species with other Ophioderma from the Atlantic; therefore, a redescription of the holotype is provided in the present work.
We observed that the holotype, as well as adult voucher specimens, can have some 'fragmented' or 'broken' dorsal arm plates ( Fig. 5HView Fig) indicating that they might have been crushed by moving between rocks and these disruptions are the result of injury ( Ziesenhenne 1955; Stöhr et al. 2020b). Hendler (2018) observed that 'fragmented' dorsal arm plates in O. panamense frequently occur on basal arm segments of adult specimens, but are rare on distal arm segments of adults and juveniles. It is important to emphasize that these fragmentations on the dorsal arm plates are a result of mechanical damage and are not an inherent feature of the species as occurs in O. peruanum , O. teres or O. vansyoci .
Along with O. hendleri sp. nov., O. panamense is one of the most conspicuous and abundant ophiuroids in the Eastern Pacific, but it has often been confused with O. teres and O. variegatum (see Discussion section). Due to its commonness, O. panamense is one of the most studied and commented species of the Eastern Pacific ( Lyman 1865; Verrill 1867; Ives 1889a; McClendon 1909; Nielsen 1932; Ziesenhenne 1955; Granja-Fernández et al. 2014), but many of these studies may be based on misidentified specimens.
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Ophioderma panamense Lütken, 1859
|Granja-Fernández, Rebeca, Pineda-Enríquez, Tania, Solís-Marín, Francisco Alonso & Laguarda-Figueras, Alfredo 2020|
|Bastida-Zavala J. R. & Garcia-Madrigal M. S. & Rosas-Alquicira E. F. & Lopez-Perez R. A. & Benitez-Villalobos F. & Meraz-Hernando J. F. & Torres-Huerta A. M. & Montoya-Marquez A. & Barrientos-Lujan N. A. 2013: 367|
|Solis-Marin F. A. & Alvarado J. J. & Abreu-Perez M. & Aguilera O. & Alio J. & Bacallado-Aranega J. J. & Williams S. M. 2013: 569|
|Granja-Fernandez M. R. & Lopez-Perez R. A. 2012: 363|
|Honey-Escandon M. & Solis-Marin F. A. & Laguarda-Figueras A. 2008: 63|
|Nielsen E. 1932: 335|
|Alvarado J. J. & Solis-Marin F. A. & Ahearn C. G. 2010: 48|
|Honey-Escandon M. & Solis-Marin F. A. & Laguarda-Figueras A. 2008: 63|
|Solis-Marin F. A. & Laguarda-Figueras A. & Duran-Gonzalez A. & Ahearn C. G. & Torres-Vega J. 2005: 128|
|Luke S. R. 1982: 33|
|Boolotian R. A. & Leighton D. 1966: 10|
|Ziesenhenne F. C. 1955: 192|
|Clark H. L. 1940: 341|
|Ziesenhenne F. C. 1937: 227|
|Nielsen E. 1932: 327|
|Clark H. L. 1917: 443|
|Clark H. L. 1915: 301|
|Granja-Fernandez R. & Herrero-Perezrul M. D. & Lopez-Perez R. A. & Hernandez L. & Rodriguez-Zaragoza F. A. & Jones R. W. & Pineda-Lopez R. 2014: 132|
|Caso M. E. 1951: 265|
|Campbell A. S. 1921: 2|
|Clark H. L. 1915: 300|
|Clark H. L. 1913: 205|
|McClendon J. F. 1909: 35|
|Koehler R. 1907: 282|
|Ives J. E. 1889: 76|
|Ives J. E. 1889: 175|
|Verrill A. E. 1867: 253|
|Lyman T. 1865: 32|
Ophioderma panamensis Lütken, 1859: 193
|Lutken C. F. 1859: 193|