On the oviposition and egg masses of Conus regius (Neogastropoda: Conidae) from northeastern Brazil

Gonçalves, Pricila Bento.; Lima, Silvio Felipe Barbosa; Oliveira, Geraldo Semer Pomponet; Lucena, Rudá Amorim

doi:10.1590/1676-0611-bn-2017-0434

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…Conids exemplify this very well, as this family has many species on the IUCN Red List of Threatened Species (IUCN 2018). Anthropogenic pressure on mollusks and other groups of invertebrates is evident in the intertidal to subtidal zones on the coast of Bahia, as many individuals [e.g., conids (Gonçalves et al 2017)] are collected for the purpose of selling the shells and as a food source (Geraldo S. P. Oliveira -personal communication based on years of observation). The first and second beaches had lower mollusk richness indices and are more accessible to tourists.…”

Section: Discussionmentioning

confidence: 99%

First inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo on Tinharé Island in northeastern Brazil

Lima

Abreu

et al. 2019

Biota Neotrop.

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The reef ecosystems of Morro de São Paulo are located in the Tinharé-Boipeba Environmental Preservation Area which was established in 1992 in the state of Bahia, Brazil. Despite this area has been created more than two decades ago, no study has provided knowledge on the invertebrate biodiversity associated with such reef ecosystems. The present investigation provides the first inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo based on the collection of living specimens and fresh empty as well as some worn shells. Mollusks were sampled in January 2015 and August 2016 through intensive searches from the intertidal to shallow subtidal habitats of the reefs on three beaches of Morro de São Paulo. Taxonomic richness and biodiversity indices were analyzed. This rapid assessment of the malacofauna resulted in the determination of 84 species belonging to 44 families of gastropods as well as 13 species belonging to eight families of bivalves and one chiton (total: 98 species). Species richness was numerically dominated by members of the subclass Caenogastropoda. The families with the largest number of species were Ranellidae (5), Muricidae (6) and Marginellidae (7). Conus regius, Cypraecassis testiculus, Lobatus goliath, Strombus pugilis, Tonna galea, Turbinella laevigata and Vasum cassiforme are extremely vulnerable macrospecies in the region due to their commercial importance. Comparisons of the malacofauna composition between the study site and Abrolhos Bank were made from data published for this region. ACE and CHAO 1 estimated 133 mollusk species for the region. Despite the rapid assessment, the number of species discovered in the study area approached 73.6% of the estimated total number. The considerable number of mollusk species found in a relatively small area with insufficient sampling underscores the importance of the reef ecosystems of Morro de São Paulo as a one priority area for conservation on the coast of the state of Bahia, Brazil, for which the species richness of other invertebrate groups is virtually unknown.

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Section: Discussionmentioning

confidence: 99%

First inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo on Tinharé Island in northeastern Brazil

Lima

Abreu

et al. 2019

Biota Neotrop.

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“…Every individual egg capsule can contain from tens to thousands of rounded-to-oval eggs of 125 μm to 1 mm in diameter (Kohn, 2012). Most studies on cone snail reproductive structures used egg masses obtained from the field or laid shortly after the specimens were transferred to laboratory water tanks (e.g., Cruz & Olivera, 1978;D' Asaro, 1970a, b;Gonçalves et al, 2017;Kohn, 1961a;Lebour, 1945;Natarajan, 1957;Nybakken, 1967;Zehra & Perveen, 1991).…”

Section: Introductionmentioning

confidence: 99%

Insights into a putative polychaete-gastropod symbiosis from a newly identified annelid worm that predates upon Conus ermineus eggs

et al. 2023

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Cone snails are a diverse group of venomous marine gastropods that have dioecious reproduction and internal fertilization resulting in egg deposition inside capsules. However, the observational studies conducted on their spawning behaviour and egg masses have left many open questions. Here, we analyse egg masses from a specimen of Conus ermineus kept in captivity for over 17 years. We present the first detailed description of the morphological features of the egg capsules and eggs (e.g., egg shape, size, and colour). The analysis of these capsules led us to the identification of a dinophilid worm (Polychaeta: Dinophilidae) living inside the snail egg capsules and likely feeding upon the snail eggs. This is the first report of such behaviours among dinophilids. Our analysis suggests that these worms belong to a new species, here described as Dimorphilus oophagus sp. nov., supported by both molecular and morphological data. Finally, we discuss the possibility of a putative symbiotic relationship between the worm and the snail.

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On the oviposition and egg masses of Conus regius (Neogastropoda: Conidae) from northeastern Brazil

Cited by 2 publications

References 24 publications

First inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo on Tinharé Island in northeastern Brazil

First inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo on Tinharé Island in northeastern Brazil

Insights into a putative polychaete-gastropod symbiosis from a newly identified annelid worm that predates upon Conus ermineus eggs

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