Diversity and ecological remarks of ectocommensals and ectoparasites (Annelida, Crustacea, Mollusca) of echinoids (Echinoidea: Mellitidae) in the Sea of Cortez, Mexico

  title={Diversity and ecological remarks of ectocommensals and ectoparasites (Annelida, Crustacea, Mollusca) of echinoids (Echinoidea: Mellitidae) in the Sea of Cortez, Mexico},
  author={Ernesto Campos and Alma Rosa de Campos and Jes{\'u}s Angel de Le{\'o}n-Gonz{\'a}lez},
  journal={Parasitology Research},
The diversity of symbiotic invertebrates on intertidal and shallow water echinoids of the northwestern Gulf of California was studied. Five ectosymbionts were found: three pinnotherid crabs, Dissodactylus lockingtoni Glassell (1935), Dissodactylus nitidus Smith (1870), and Dissodactylus xanthusi Glassell (1936); one eulimid gastropod, Turveria encopendema Berry (1956); and one polychaete, Struwela sp. We discovered seasonal fluctuation in D. nitidus Smith (1870) and D. xanthusi Glassell (1936… 

New ecological and taxonomic remarks on Sabinella troglodytes and Nanobalcis worsfoldi (Gastropoda: Eulimidae) living on the “slate-pencil sea urchin” from the Mexican Caribbean region

Mantle pigmentation patterns, mode of attachment, live displacement, and other ecological observations on the host are presented for the first time for both eulimids from the Mexican Caribbean Sea.

Distribution patterns of ectosymbiont crabs and their sand dollar hosts in a subtropical estuarine sandflat.

Sand dollar densities had an aggregate distribution pattern with patches of different densities within transects and periods, refuting the hypothesis that space is a limiting resource for the crabs and suggesting that other factors may be more important for the population dynamics of D. crinitichelis than competition for space per se.

Symbiotic assemblage associated with the tropical sea urchin, Salmacis bicolor (Echinoidea:Temnopleuridae) in the An Thoi archipelago, Vietnam

The symbiotic assemblage associated with the tropical sea urchin, Salmacis bicolor was studied in the An Thoi archipelago, Vietnam. Five species of macrosymbionts were found on the surface of this

Echinoderms piggybacking on sea cucumbers: Benign effects on sediment turnover and movement of hosts

Appreciable numbers of scaleworms, crabs and shrimps on the sea cucumber show that sea cucumbers can act as hosts to echinoderms and other epibiotic taxa, bolstering the notion that they play important ecological roles in reef ecosystems.

Decapod crustaceans associating with echinoids in Roatán, Honduras

Decapods associated with the longest-spined species, D. antillarum, at a rate more than six times higher than that of any other echinoid species, supporting the hypothesis that decapods seek shelter among the spines of echinoids to benefit from decreased predation.

Another brick in the wall: population dynamics of a symbiotic species of Oxydromus (Annelida, Hesionidae), described as new based on morphometry

Oxydromus humesi is an annelid polychaete living as a strict bivalve endosymbiont (likely parasitic) of Tellina nymphalis in Congolese mangrove swamps and of Scrobicularia plana and Macomopsis

Taxonomy of Pinnotheres bipunctatus Nicolet, 1849 with a distributional checklist of the Pinnotheridae of Chile and Peru, and a list of the Crustacea described by Hercule Nicolet in the Atlas of the Physical and Political History of Chile

Although males of these species can morphologically be separated, the holotype of P. bipunctatus resembles a juvenile, consequently, a categorical taxonomic distinction between this species and P. chilensis will require a comparative morphological study of the preadult stages of this latter species.

Symbiotic Association between Athanas dorsalis (Alpheidae) and Stomopneustes variolaris (Echinoidea) from Visakhapatnam Coast, India

A new association between the rock boring intertidal dwelling sea urchin Stomopneustes variolaris and the alpheidae, A. dorsalis is reported, where the shrimp derives its food from the algal bits nibbled by the host and the host does not seem to have any obvious advantage out of this association.

Phylogeny of Microphthalminae Hartmann-Schröder, 1971, and revision of Hesionella Hartman, 1939, and Struwela Hartmann-Schröder, 1959 (Annelida, Errantia)

A phylogenetic analysis of the subfamily and some other similar poorly-known genera, with an uncertain position in Hesionidae was performed to clarify their affinities, and results indicate that Microphthalminae, as currently delimited, is paraphyletic.

Host selection, host-use pattern and competition in Dissodactylus crinitichelis and Clypeasterophilus stebbingi (Brachyura: Pinnotheridae)

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Multivariate analysis of morphometric data, representing specimens from Nantucket to Brazil, indicates the presence of three allopatric Atlantic species, which do not form a monophyletic group.

Revision of Hypermastus Pilsbry, 1899 and Turveria Berry, 1956 (Gastropoda: Prosobranchia: Eulimidae), two genera parasitic on sand dollars

Nine new eulimid gastropods belonging to the genera Hypermastus Pilsbry, 1899 and Turveria Berry, 1956 are described. Fifteen more eulimids, previously mainly classified in Eulima Risso, 1826 and

Taxonomy of the genus Dissodactylus (Crustacea: Brachyura: Pinnotheridae) with descriptions of three new species

Several taxonomic problems within the genus Dissodactylus (Crustacea: Pinnotheridae) are resolved and three new species are described, and D. stebbingi is redescribed, accompanied by a description of the first zoeal stage.

Dissodactylus xantusi and Dissodactylus lockingtoni (Decapoda: Brachyura: Pinnotheridae): larval development of two sympatric Pacific species

Dissodactylus xantusi and D. lockingtoni are small pinnotherid crabs living with D. nitidus as ectosymbionts on the Pacific sand dollars and develop through four zoeal stages before metamorphosing to the megalopa, in contrast to the Atlantic species with known larval development.

A new west Mexican prosobranch mollusk parasitic on echinoids

Shells of two kinds of minute prosobranchs apparently belonging to the Stiliferidae were taken by the writer in 1949 from sand screenings at Cholla Cove near Puerto Pefiasco, Sonora, Mexico. These

New records of and notes on decapod crustaceans in the east Pacific

Although the decapod crustaceans of the east Pacific are well-known (see Morris et al., 1980; Austin, 1985; Hendrickx, 1993, 2005; and Retamal & Jara, 2002 for compilations and further references),

Pleijelius longae n. gen., n. sp., a remarkable deep water polychaete from the Northwestern Atlantic (Polychaeta: Hesionidae)

A cladistic analysis indicates that this new taxon falls within Hesionidae and is the sister group to Hesioninae.

Phylogeny and classification of Hesionidae (Polychaeta)

High degrees of homoplasy are demonstrated for a number of characters traditionally used in hesionid taxonomy, e.g., distribution of anterior, enlarged cirri, and first segment provided with neurochaetae and neuropodial lobes.

Zur ökologie der polychaeten des mangrove‐estero‐gebietes von El salvador

In der vorliegenden Arbeit wurde das Eulitoral der Estero‐Mangrove‐Gebietc El Salvadors hinsichtlich seiner Polychaetenbesiedlung untersucht, das in El Salvador verhaltnismasig wenig sedentare Arten vorkommen.

Comentarios sobre la distribución de la langosta pinta Panulirus inflatus y la langosta roja P. interruptus (Crustacea: Palinuridae) en el Pacífico mexicano