Phascolosoma (Phascolosoma) cf. perlucens Baird, 1868

Silva-Morales, Itzahí & Gómez-Vásquez, Julio D., 2021, First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific, European Journal of Taxonomy 740 (1), pp. 77-117: 88-89

publication ID

https://doi.org/10.5852/ejt.2021.740.1283

publication LSID

lsid:zoobank.org:pub:07F1B593-9F4F-4B32-88D9-ADC5CA0BEB84

DOI

http://doi.org/10.5281/zenodo.4644408

persistent identifier

http://treatment.plazi.org/id/03CA87A4-D37B-802E-79D9-412EFC1560F9

treatment provided by

Plazi

scientific name

Phascolosoma (Phascolosoma) cf. perlucens Baird, 1868
status

 

Phascolosoma (Phascolosoma) cf. perlucens Baird, 1868  

Fig. 6 View Fig

Type locality of nominal species

Jamaica ( Baird 1868: 90–91, pl. 10, fig. 2–2a).

Material examined

MEXICO – Guerrero • 2; La Quebrada; 16°50′44″ N, 99°54′54″ W; 21 Sep. 2001; depth 15–20 m, in Pinctada mazatlanica (Hanley, 1856)   ; UMAR-SIPU 036 GoogleMaps   4; Ixtapa Island, Coral Beach ; 17°40′37″ N, 101°39′20″ W; 19 Sep. 2007; in dead coral with algae; UMAR-SIPU 037 GoogleMaps   52; Ixtapa Island ; 17°40′37″ N, 101°39′20″ W; 24 Sep. 2007; SGM leg.; in pier piles; UMAR-SIPU 038 GoogleMaps   8; Punta Maldonado Beach; 16°19′39″ N, 98°34′15″ W; 23 Sep. 2007; SGM leg.; in algae; UMAR-SIPU 039 GoogleMaps   8; Marquelia, Las Peñitas Beach ; 16°33′16″ N, 98°46′21″ W; 22 Sep. 2007; SGM leg.; UMAR-SIPU 040 GoogleMaps   8; Manzanillo Beach ; 16°50′31″ N, 99°54′38″ W; 22 Sep. 2007; in pier piles with sponge; SGM leg.; UMAR-041 GoogleMaps   3; Barra de Potosí ; 17°32′19″ N, 101°26′36″ W; 3 Dec. 2010; SGG leg.; UMAR-SIPU 042 GoogleMaps   . – Oaxaca • 2; La Tijera Beach; 15°41′15″ N, 96°26′33″ W; 24 May 2004; RBR leg.; in rock; UMAR-SIPU 043 GoogleMaps   18; Estacahuite Beach ; 15°40′05″ N, 96°28′53″ W; 18 Apr. 2005; SGM leg.; in rocks with carbonate; UMAR-SIPU 044 GoogleMaps   19; La Tijera Beach ; 15°41′15″ N, 96°26′33″ W; 30 Apr. 2005; UMAR-SIPU 045 GoogleMaps   12; Estacahuite Beach; 15°40′05″ N, 96°28′53″ W; 10 Sep. 2005; in dead coral; UMAR-SIPU 046 GoogleMaps   2; La Tijera Beach; 15°41′15″ N, 96°26′33″ W; 12 Sep. 2006; depth 4 m, in dead coral; UMAR-SIPU 048 GoogleMaps   3; Chachacual Bay , Jicaral Beach; 15°42′39″ N, 96°12′11″ W; 10 Feb. 2007; depth 5.6 m, in Porites   sp.; UMAR-SIPU 049 GoogleMaps   2; San Agustín Bay ; 15°41′21″ N, 96°14′11″ W; 24 Feb. 2007; UMAR- SIPU 050 GoogleMaps   2; Chacahua ; 15°58′07″ N, 97°32′09″ W; 13 Apr. 2007; in rocks; UMAR-SIPU 052 GoogleMaps   45; Chacahua; 15°58′07″ N, 97°32′09″ W; 14 Apr. 2007; SGM leg.; in artificial monticule; UMAR-SIPU 053 GoogleMaps   3; Huatulco, Conejos Bay ; 15°46′44″ N, 96°03′51″ W; 5 May 2007; in algae; UMAR-SIPU 054 GoogleMaps   1; Zipolite, Playa del Amor ; 15°39′37″ N, 96°30′38″ W; 13 Apr. 2007; UMAR-SIPU 055 GoogleMaps   1; Chacahua ; 15°58′07″ N, 97°32′09″ W; 10 Nov. 2007, PHM and RBZ leg.; UMAR-SIPU 056 GoogleMaps   1; Huatulco, Santa Cruz Beach ; 15°45′10″ N, 96°07′49″ W; 14 Dec. 2007; BMD and PHM leg.; depth 0.5 m, in pier piles; UMAR-SIPU 057 GoogleMaps   4; Panteón Beach ; 15°39′50″ N, 96°29′42″ W; 16 Apr. 2008; JDG and GGG leg.; depth 3 m, in dead coral; UMAR-SIPU 058 GoogleMaps   1; La Montosa Island ; 15°45′57″ N, 96°05′03″ W; 22 Feb. 2010; RGF and SGG leg.; depth 3.6 m, in Pocillopora damicornis (Linnaeus, 1758)   ; UMAR-SIPU 059 GoogleMaps   36; Puerto Ángel Bay ; 15°39′56″ N, 96°29′29″ W; 10 Jun. 2011; RBR leg.; depth 0.5 m, in pier piles; UMAR-SIPU 060 GoogleMaps   4; Agua Blanca Beach ; 15°43′58″ N, 96°48′38″ W; 27 Apr. 2012; KLT leg.; UMAR- SIPU 061 GoogleMaps   9; Puerto Ángel Bay ; 15°39′56″ N, 96°29′29″ W; 28 May 2014; ISM and JGV leg.; in pier piles; UMAR-SIPU 062 GoogleMaps   4; Puerto Ángel Bay ; 15°39′56″ N, 96°29′29″ W; 8 Jun. 2014; ISM and JGV leg.; in pier piles; UMAR-SIPU 063 GoogleMaps   3; Chacahua , Cerro Hermoso Beach ; 15°58′08″ N, 97°32′06″ W; 30 Apr. 2014; in mangrove root; UMAR-SIPU 064 GoogleMaps   5; Agua Blanca Beach ; 15°43′58″ N, 96°48′38″ W; 30 Apr. 2014; UMAR-SIPU 065 GoogleMaps   8; Boquilla Beach ; 15°40′58″ N, 96°27′54″ W; 22 May 2014; UMAR- SIPU 066 GoogleMaps   1; Huatulco, Santa Cruz Beach ; 15°45′10″ N, 96°07′49″ W; 16 Dec. 2016; JGV leg.; in sand, UMAR-SIPU 067 GoogleMaps   3; Violín Beach ; 15°44′24″ N, 96°07′38″ W; 1 Dec. 2016; JGV leg.; UMAR-SIPU 068 GoogleMaps   22; San Agustín Bay ; 15°41′21″ N, 96°14′11″ W; 2 Dec. 2016; JGV leg.; UMAR-SIPU 069 GoogleMaps   1; La Montosa Island ; 15°45′57″ N, 96°05′03″ W; 22 Feb. 2010; SGM leg.; depth 4.6 m, in Porites   sp.; UMAR-SIPU 070 GoogleMaps   . – Chiapas • 19; Puerto Chiapas; 14°42′11″ N, 92°24′36″ W; 20 Sep. 2011; RBZ leg.; in pier piles, in rock with oyster; UMAR-SIPU 051 GoogleMaps   .

Description

Trunk 3–18 mm in length. Introvert as long as trunk ( Fig. 6A View Fig ), with patches of dark brown pigment in dorsal part. Reddish conical papillae on dorsal base of introvert, posterior to anus ( Fig. 6E–F View Fig ). Introvert bears 15 rings of hooks ( Fig. 6D View Fig ). Hooks with secondary tooth and basal triangle ( Fig. 6C View Fig ). Fourteen digitiform tentacles encircling nuchal organ ( Fig. 6D View Fig ). Longitudinal muscles of body wall combined into bands. Four retractor muscles. Two brown nephridia occupy 30% of trunk ( Fig. 6B View Fig ). Spindle muscle attached posteriorly.

Remarks

Although there are no morphological characters to support that the populations of Phascolosoma perlucens   from the Caribbean and the Eastern Pacific are different species, the molecular data provides strong evidence of a differentiation between both populations ( Kawauchi & Giribet 2010); therefore, we propose to consider this species as being near to the nominal species. It is possible that the specimens recorded here and other records from the Tropical Eastern Pacific ( Fisher 1952; Dean 2001; Dean et al. 2010) are a new species.

Habitat

Intertidal and subtidal (20 m); as epibionts of Pinctada mazatlantica   , in dead coral, between the fouling of pier piles, in macroalgae, in a sabellariid reef, in mangrove roots and in sand.

Distribution

Southern Mexican Pacific, from Ixtapa, Guerrero to Puerto Chiapas.

ISM

Illinois State Museum