Critical analysis of subgeneric taxa of the Subfamily Caecinae (Caenogastropoda: Caecidae)

Absalão, Ricardo Silva; Pizzini, Mauro

doi:10.1127/arch.moll/131/2002/167

Cited by 6 publications

(7 citation statements)

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“…Moreover, the diagnostic spiral growth pattern in the larval and juvenile shell of Meioceras (Bandel 1996) might not be used for unambiguous discrimination as our phylogeny indicates that such patterns have evolved independently at least two times within the genus Caecum. The bulbous adult shell with an oblique constricted aperture was thought to develop from the preceding ontogenesis of a helicoidal shell section, observable at the beginning of the second growth stages (De Folin 1880;Absalão and Pizzini 2002). This diagnosis has been problematic because in the past other species (Absalão and Pizzini 2002) that also express a similar shell-shape had been classified as Caecum due to a lack of observations of the juvenile stadia or the lack of the afore-mentioned growth pattern (e.g., Caecum ryssotitum, Bandel 1996).…”

Section: Taxonomic Consequences For Caecidae and The Fate Of Meiocerasmentioning

confidence: 99%

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America

Egger¹,

Neusser²,

Norenburg³

et al. 2020

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Caecidae is a species-rich family of microsnails with a worldwide distribution. Typical for many groups of gastropods, caecid taxonomy is largely based on overt shell characters. However, identification of species using shell characteristics is problematic due to their rather uniform, tubular shells, the presence of different growth stages, and a high degree of intraspecific variability. In the present study, a first integrative approach to caecid taxonomy is provided using light-microscopic investigation with microsculptural analyses and multi-marker barcoding, in conjunction with molecular species delineation analyses (ABGD, haplotype networks, GMYC, and bPTP). In total 132 specimens of Caecum and Meioceras collected during several sampling trips to Central America were analyzed and delineated into a minimum of 19 species to discuss putative synonyms, and supplement the original descriptions. Molecular phylogenetic analyses suggest Meioceras nitidum and M. cubitatum should be reclassified as Caecum, and the genus Meioceras might present a junior synonym of Caecum. Meiofaunal caecids morphologically resembling C. glabrum from the Northeast Atlantic are a complex of cryptic species with independent evolutionary origins, likely associated with multiple habitat shifts to the mesopsammic environment. Caecum invisibile Egger & Jörger, sp. nov. is formally described based on molecular diagnostic characters. This first integrative approach towards the taxonomy of Caecidae increases the known diversity, reveals the need for a reclassification of the genus Caecum and serves as a starting point for a barcoding library of the family, thereby enabling further reliable identifications of these taxonomically challenging microsnails in future studies.

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Section: Taxonomic Consequences For Caecidae and The Fate Of Meiocerasmentioning

confidence: 99%

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America

Egger¹,

Neusser²,

Norenburg³

et al. 2020

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“…Â aeèçíåííîì öèêëå ìîëëþñêîâ ðàçíûõ âèäîâ ñåìåéñòâà Caecidae íàáëþäàåòñÿ îò 4 äî 6 ñòàäèé ðîñòà. Âçðîñëûå ðàêîâèíû íà ðàçíûõ ñòàäèÿõ ðîñòà, êàê ïðàâèëî, èìåþò íåáîëüøèå ðàçëè÷èÿ â ðàçìåðàõ è ôîðìå, à èíîãäà è â ñêóëüïòóðå (Bandel, 1996;Absalão, Gomes, 2001;Absalão, Pizzini, 2002). Îäíàêî åäèíñòâåííûì ñòàáèëüíûì òàêñîíî-ìè÷åñêèì ïðèçíàêîì ðàêîâèí âçðîñëûõ ìîëëþñêîâ ÿâëÿåòñÿ ñòðîåíèå ìóêðî âûñòóïà â çàäíåé ÷àñòè ðàêîâèíû.…”

Section: ââåäåíèåunclassified

“…Ñëåäóåò îòìåòèòü, ÷òî îòå÷åñòâåííûå ó÷åíûå ðàññìàòðèâàþò Brochina Gray, 1873 è Fartulum Carpenter, 1857 êàê ðîäû (Ãîëèêîâ, Ñêàðëàòî, 1967; Âîëîâà è äð., 1979; Àäðèàíîâ, Êóñàêèí, 1998; Ãóëüáèí, 2004), òîãäà êàê çàðóáåaeíûå àâòîðû ïðèäàþò èì ñòàòóñ ïîäðîäîâ è âêëþ÷àþò â áîëüøîé ðîä Caecum (Bandel, 1996;Absalão, Gomes, 2001;Absalão, Pizzini 2002).…”

Section: ââåäåíèåunclassified

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Reproduction and development of the prosobranch gastropod mollusks of Caecidae family in Peter the Great Bay (Sea of Japan)

Kolbin

Kulikova²

2006

Invertzool

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ÐÅÇÞÌÅ: Â ëàáîðàòîðíûõ óñëîâèÿõ âïåðâûå èññëåäîâàíî ðàçìíîaeåíèå è ðàçâèòèå ïåðåäíåaeàáåðíûõ áðþõîíîãèõ ìîëëþñêîâ ñåìåéñòâà Caecidae: Brochina derjugini Golikov (Golikov et Scarlato, 1967) è Fartulum bucerius Golikov (Golikov et Scarlato, 1967). Â çàë. Âîñòîê (çàë. Ïåòðà Âåëèêîãî) ýòè âèäû ðàçìíîaeàþòñÿ â èþëå ïðè òåìïåðàòóðå âîäû 1720 î Ñ. Îïëîäîòâîðåíèå ó îáîèõ âèäîâ âíóòðåííåå, ðàçâèòèå ïðîèñõîäèò ñ ôîðìèðîâàíèåì êëàäîê è ïîñëåäóþùèì âûõîäîì èç íèõ â ïëàíêòîí ëè÷èíîê íà ñòàäèè âåëèãåð. Ñðîêè íåðåñòà, ñêîðîñòü ðàçâèòèÿ, ìîðôîëîãèÿ ëè÷èíîê è ñêóëüïòóðà ïðîòî-è òåëåîêîíõîâ ýòèõ âèäîâ îäèíàêîâû, ÷òî ñâèäåòåëüñòâóåò îá èõ áëèçêîì ðîäñòâå è ïîçâîëÿåò îòíåñòè ê ðîäó Caecum êàê äâà ïîäðîäà.

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“…For information regarding growth morphology and septum formation, see Pizzini et al (1998) and Lima et al (2013), for classification, see Bandel (1996) and Absalão & Pizzini (2002).…”

Section: Introductionmentioning

confidence: 99%

<p class="HeadingRunIn"><strong>Caecidae of the northeast Pacific (Gastropoda: Caenogastropoda)</strong></p>

Raines

2019

Zoosymposia

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Critical analysis of subgeneric taxa of the Subfamily Caecinae (Caenogastropoda: Caecidae)

Cited by 6 publications

References 0 publications

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America

Reproduction and development of the prosobranch gastropod mollusks of Caecidae family in Peter the Great Bay (Sea of Japan)

<p class="HeadingRunIn"><strong>Caecidae of the northeast Pacific (Gastropoda: Caenogastropoda)</strong></p>

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