A reconsideration of epipodial and cephalic appendages in basal gastropods: homologies, modules and evolutionary scenarios

Haszprunar, Gerhard; Kunze, Thomas; Warèn, Anders; Heß, Martin

doi:10.1093/mollus/eyx032

Cited by 8 publications

(3 citation statements)

References 97 publications

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“…weddelliana (Zelaya & Geiger, 2007), the Japanese A. fujikurai Sasaki, Geiger & Okutani, 2010, the W American A. kelseyi (Dall, 1905 and A. janetae Geiger, 2006, the Peruvian A. peruviana (Geiger & McLean, 2010) and the NE Atlantic A. tenuisculpta (Seguenza, 1877). Haszprunar et al (2017) studied the epipodial and cephalic appendages in basal gastropods. They confirmed that ESO pairs are present in species in Cocculiniformia, Neomphalida and Vetigastropoda.…”

Section: Discussionmentioning

confidence: 99%

“…Foot small when contracted, with irregular surface. Four epipodial appendages on right side; anteriorly two smaller, papillate epipodial tentacles and two large ones posteriorly; the most posterior probably epipodial sensory organ (ESO; Sasaki et al 2010;Haszprunar et al 2017). Three epipodial appendages on left side; small papillate tentacle anteriorly; second smaller epipodial tentacle or small ESO; most posteriorly a large ESO.…”

Section: Anatomical Descriptionmentioning

confidence: 99%

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Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Hoffman

Kniesz

Arbizu

et al. 2022

EJT

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New species in Anatoma Woodward, 1859 (Anatomidae, Vetigastropoda) are found in abyssal hydrothermal vent field habitats on the oceanic plate margins in the Indian Ocean. Six species are identified using molecular sequence analyses of which four species are described as new based on their morphological characters: Anatoma discapex sp. nov., Anatoma declivis sp. nov., Anatoma laevapex sp. nov. and Anatoma paucisculpta sp. nov. Inadequate material was available for a morphological description of the other two species with genetic identification, but it is likely that all six species are new to science and endemic to the Indian Ocean. The northern Central Indian Ridge localities are dominated by Anatoma declivis sp. nov.; its closest relative is Anatoma discapex sp. nov. which occurs in the central area near the Rodriguez Triple Junction. Anatoma laevapex sp. nov. and Anatoma paucisculpta sp. nov. as well as a fifth undescribed species are mainly found on the Southeast Indian Ridge.

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Section: Discussionmentioning

confidence: 99%

Section: Anatomical Descriptionmentioning

confidence: 99%

Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Hoffman

Kniesz

Arbizu

et al. 2022

EJT

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“…In many invertebrate groups, tentacles are specialized organs used to sense the environment by detecting olfactory and tactile stimuli (Künz and Haszprunar 2001;Ruth et al 2002). While some of these appendages have been extensively investigated in mollusks, such as the cephalic tentacles of gastropods (e.g., Haszprunar et al 2017), comparative data are still required to characterize morphological and functional diversity and unravel the evolutionary history of tentacular structures.…”

Section: Introductionmentioning

confidence: 99%

Untangling the diversity and evolution of tentacles in scallops, oysters, and their relatives (Bivalvia: Pteriomorphia)

2021

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3D-anatomy and systematics of cocculinid-like limpets (Gastropoda: Cocculiniformia): more data, some corrections, but still an enigma

et al. 2022

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New material and new methodologies substantially widen the anatomical knowledge on cocculinid limpets. We first provide 3D-anatomies of Fedikovella caymanensis and Teuthirostria cancellata based on serial sections. Both species differ in several major points (mainly the gill-type and several features of the alimentary tract) from typical cocculinids, accordingly they are classified in a new clade, Teuthirostriidae fam. nov. Specimens studied by McLean and Harasewych (LA County Mus Contrib Sci 453:1–33, 1995) under “Fedikovella beanii” probably represent another species new to science. Additional investigations of original (type) section series of Cocculina laevis Thiele, 1904 (type species of Paracocculina Haszprunar, 1987) and of Cocculina radiata Thiele, 1904 (type species of Coccocrater Haszprunar, 1987) imply some nomenclatorial revisions: Cocculina cervae Fleming, 1948 is designated as type species of Pedococculina gen. nov. Anatomical characters confirm the subsequent placement of Cocculina viminensis Rocchini, 1990 into Coccopigya Marshall, 1986, whereas the original generic status of the whale-fall inhabitant Cocculina craigsmithi McLean, 1992 is confirmed despite the unusual habitat. The latter species probably has symbiotic bacteria in the midgut gland; if so this might be due to the environmental and feeding conditions at whale cadavers or hydrothermal vents. Contrary to Lepetelloidea, the Cocculiniformia cannot be included in Vetigastropoda. Recent molecular data support a sistergroup relationship of Cocculiniformia with Neomphalida, and we add the phenotypic perspective on this so-called “Neomphaliones”-hypothesis. In particular, more phylogenomic data are needed to specify the position of Cocculinida among the rhipidoglossate Gastropoda.

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A reconsideration of epipodial and cephalic appendages in basal gastropods: homologies, modules and evolutionary scenarios

Cited by 8 publications

References 97 publications

Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Untangling the diversity and evolution of tentacles in scallops, oysters, and their relatives (Bivalvia: Pteriomorphia)

3D-anatomy and systematics of cocculinid-like limpets (Gastropoda: Cocculiniformia): more data, some corrections, but still an enigma

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