The Phylogeny and Morphological Adaptations of<i>Cyclotus taivanus</i>ssp. (Gastropoda: Cyclophoridae)

Lee, Yen Chen; Lue, Kuang Yang; Wu, Wen Lung

doi:10.4002/040.055.0106

Cited by 10 publications

(9 citation statements)

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“…The evolution of Plectostoma shell size (shell volume) is not constrained by phylogeny. This finding confirms the results of most previous studies in which shell size (estimated by other metrics) tends to be as dissimilar between closely related species within a genus, as between more distantly related species (Teshima et al, 2003;Parmakelis et al, 2003;Johnson et al, 2004;Ketmaier, Giusti & Caccone, 2006;Bichain et al, 2007;Kameda, Kawakita & Kato, 2007;Elejalde et al, 2008b;Fiorentino et al, 2008;Puslednik et al, 2009;Buckley et al, 2011;Stankowski, 2011;Criscione, Law & Koehler, 2012;Johnson et al, 2012;Koehler& Johnson, 2012;Lee, Lue & Wu, 2012;Criscione & koehler, 2013;Du et al, 2013; but see Martinez-Orti et al, 2008;Kotsakiozi et al, 2013).…”

Section: Shell Size Ontogeny and Evolutionsupporting

confidence: 90%

“…Hence, shell form is prone to convergent evolution at various taxonomic levels (Wagner & Erwin, 2006). Phylogenetically closely related species, even within genus level, are known not to have similar shell size (Teshima et al, 2003;Parmakelis et al, 2003;Johnson et al, 2004;Ketmaier, Giusti & Caccone, 2006;Bichain et al, 2007;Kameda, Kawakita & Kato, 2007;Elejalde et al, 2008a;Fiorentino et al, 2008b;Puslednik et al, 2009;Buckley et al, 2011;Stankowski, 2011;Criscione, Law & Koehler, 2012;Koehler& Johnson, 2012;Lee, Lue & Wu, 2012;Criscione & koehler, 2013;Du et al, 2013, but see Martinez-Orti et al, 2008Kotsakiozi et al, 2013). Similary, shell shape similarity does not usually translate to a close phylogenetic relationship between species (Boato, 1991;Emberton, 1995;Teshima et al, 2003;Tongkerd et al, 2004;Elejalde et al, 2005;Noshi & Sota, 2007;Elejalde et al, 2008a;Elejalde et al, 2008b;Stankowski, 2011;Johnson et al, 2012;Haase, Esch & Misof, 2013).…”

Section: Introductionmentioning

confidence: 99%

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The rampant convergent and parallel evolution in shell form in the Gastropoda is well known. Many studies focus on the functional drivers which have been regarded as a major force in shell evolution. There is, however, a scarcity in studies that aim at understanding shell form evolution with respect to their ontogeny. Hence, we investigated the evolution of shell form in the micro-landsnail genus Plectostoma (Diplommatinidae) from the viewpoint of shell ontogeny. We examined the aperture ontogeny profiles that describe how aperture form and growth trajectory change along the shell ontogeny, and how the aperture ontogeny profiles relate to the observed shell forms. We also estimated the phylogeny of Plectostoma species, and examined patterns of character evolution for shell form. Our study revealed a general issue in the characterisation of shell shape and demonstrated how shell shape differences can be expressed as differences in the ontogeny of morphospace. It is clear that in Plectostoma the phylogenetic history does not prevent the course of shell ontogeny, and the resultant form. Finally, each species has a unique aperture ontogeny profile that determines its shell shape while retaining a conserved developmental program that maintains shell size.

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Section: Shell Size Ontogeny and Evolutionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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“…Significant variations in quantitative shell characters within or between species were often detected in family Cyclophoridae (Lee et al, 2012;Nantarat et al, 2014b) and gastropods (Kameda et al, 2007;Desouky & Busais, 2012;Hirano et al, 2014). From the phylogenetic signal test, only shell height produced a significant signal.…”

Section: Discussionmentioning

confidence: 98%

Land snails of Leptopoma Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and variations in shell form due to geography

Phung

Heng

Liew

2017

Preprint

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Leptopoma is a species rich genus with approximately 100 species documented according to shell morphology and animal anatomy. Many of the Leptopoma species are described in terms of shell size, shape, sculpture and colour patterns of a small number of examined materials. However, the implications of the inter-and intra-species variations in shell form to the taxonomy of Leptopoma species and the congruency of its current shell based taxonomy with its molecular phylogeny are still unclear. Over the last decade, more than 900 collection lots consisting of more than 4000 Leptopoma specimens have been obtained in Sabah and deposited in BORNEENSIS at Universiti Malaysia Sabah. Access to this collection gave us the opportunity to examine the geographical variations in shell forms and the phylogenetic relationship of Leptopoma species in Sabah. The phylogenetic relationship of three Leptopoma species was first estimated by performing maximum likelihood and Bayesian analysis based on mitochondrial genes (16S and COI) and nuclear gene (ITS-1). After this, a total of six quantitative shell characters (i.e. shell height, shell width, aperture height, aperture width, shell spire height, and ratio of shell height and width) and three qualitative shell characters (i.e. shell colour patterns, spiral ridges, and dark ring band in aperture) of the specimens were mapped across the phylogenetic tree two Leptopoma species, these also pointed to intra-species differences between populations from different locations. This study provides an initiation to resolve the taxonomy conundrum for the remaining 100 little known Leptopoma species from other regions and highlights a need to assess variations in shell characters before they could be used in species classification. 8 Abstract. Leptopoma is a species rich genus with approximately 100 species documented 9 according to shell morphology and animal anatomy. Many of the Leptopoma species are described 10 in terms of shell size, shape, sculpture and colour patterns of a small number of examined 11 materials. However, the implications of the inter-and intra-species variations in shell form to the 12 taxonomy of Leptopoma species and the congruency of its current shell based taxonomy with its 13 molecular phylogeny are still unclear. Over the last decade, more than 900 collection lots 14 consisting of more than 4000 Leptopoma specimens have been obtained in Sabah and deposited in 15 BORNEENSIS at Universiti Malaysia Sabah. Access to this collection gave us the opportunity to 16 examine the geographical variations in shell forms and the phylogenetic relationship of Leptopoma 17 species in Sabah. The phylogenetic relationship of three Leptopoma species was first estimated by 18 performing maximum likelihood and Bayesian analysis based on mitochondrial genes (16S and 19 COI) and nuclear gene (ITS-1). After this, a total of six quantitative shell characters (i.e. shell 20 height, shell width, aperture height, aperture width, shell spire height, and ratio of shell height and 21 width) and three...

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“…Significant inter-and intra-specific variations in quantitative shell characters have been 324 noted both in family Cyclophoridae (Lee et al, 2012;Nantarat et al, 2014b) and in other 325 gastropods (Kameda et al, 2007;Desouky & Busais, 2012;Hirano et al, 2014). In Vermeulen's 326 (1999) descriptions of L. sericatum and L. pellucidum, the ratio of shell height to width of L. 327 sericatum is slightly smaller than L. pellucidum.…”

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confidence: 99%

Peer Review #1 of "Land snails of Leptopoma Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and geographical variations in shell form (v0.1)"

2017

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Leptopoma is a species rich genus with approximately 100 species documented. Specieslevel identification in this group has been based on shell morphology and colouration, as well as some anatomical features based on small sample sizes. However, the implications of the inter-and intra-species variations in shell form to the taxonomy of Leptopoma species and the congruency of its current shell based taxonomy with its molecular phylogeny are still unclear. There are four Leptopoma species found in Sabah, Borneo, and their taxonomy status remains uncertain due to substantial variation in shell forms. This study focuses on the phylogenetic relationships and geographical variation in shell form of three Leptopoma species from Sabah.The phylogenetic relationship of these species was first estimated by performing Maximum Likelihood and Bayesian analysis based on mitochondrial genes (16S and COI) and nuclear gene (ITS-1). Then, a total of six quantitative shell characters (i.e. shell height, shell width, aperture height, aperture width, shell spire height, and ratio of shell height to width) and three qualitative shell characters (i.e. shell colour patterns, spiral ridges, and dark apertural band) of the specimens were mapped across the phylogenetic tree and tested for phylogenetic signals. Data on shell characters of Leptopoma sericatum and Leptopoma pellucidum from two different locations (i.e. Balambangan Island and Kinabatangan) where both species occurred sympatrically were then obtained to examine the geographical variations in shell form. The molecular phylogenetic analyses suggested that each of the three Leptopoma species was monophyletic and indicated congruence with only one of the shell characters (i.e. shell spiral ridges) in the current morphological-based classification. Although the geographical variation analyses suggested some of the shell characters indicating inter-species differences between the two Leptopoma species, these also pointed to intra-species differences between populations from different locations. This study on Leptopoma species is based on small sample size and the findings appear only applicable to Leptopoma species in Sabah. Nevertheless, we anticipate this study to be a starting point for more PeerJ reviewing PDF |

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The Phylogeny and Morphological Adaptations ofCyclotus taivanusssp. (Gastropoda: Cyclophoridae)

Cited by 10 publications

References 30 publications

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Land snails of Leptopoma Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and variations in shell form due to geography

Peer Review #1 of "Land snails of Leptopoma Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and geographical variations in shell form (v0.1)"

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