The contribution of molecular data to our understanding of cephalopod evolution and systematics: a review

Allcock, A. Louise; Lindgren, Annie R.; Strugnell, Jan M.

doi:10.1080/00222933.2013.825342

Cited by 73 publications

(58 citation statements)

References 216 publications

(309 reference statements)

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“…A range of molecular studies has been conducted on coleoids (Allcock et al . ), including population structure analysis using minisatellites, microsatellites and mitochondrial DNA (Dillane et al . ; Zheng et al .…”

Section: Discussionmentioning

confidence: 99%

The genetic structure of Nautilus pompilius populations surrounding Australia and the Philippines

et al. 2015

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Understanding the distribution of genetic diversity in exploited species is fundamental to successful conservation. Genetic structure and the degree of gene flow among populations must be assessed to design appropriate strategies to prevent the loss of distinct populations. The cephalopod Nautilus pompilius is fished unsustainably in the Philippines for the ornamental shell trade and has limited legislative protection, despite the species' recent dramatic decline in the region. Here, we use 14 microsatellite markers to evaluate the population structure of N. pompilius around Australia and the Philippines. Despite their relative geographical proximity, Great Barrier Reef individuals are genetically isolated from Osprey Reef and Shark Reef in the Coral Sea (F ST =0.312, 0.229, respectively). Conversely, despite the larger geographical distances between the Philippines and west Australian reefs, samples display a small degree of genetic structure (F ST =0.015). Demographic scenarios modelled using approximate Bayesian computation analysis indicate that this limited divergence is not due to contemporary gene flow between the Philippines and west Australia. Instead, present-day genetic similarity can be explained by very limited genetic drift that has occurred due to large average effective population sizes that persisted at both locations following their separation. The lack of connectivity among populations suggests that immigrants from west Australia would not facilitate natural recolonization if Philippine populations were fished to extinction. These data help to rectify the paucity of information on the species' biology currently inhibiting their conservation classification. Understanding population structure can allow us to facilitate sustainable harvesting, thereby preserving the diversity of genetically distinct stocks.

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Section: Discussionmentioning

confidence: 99%

The genetic structure of Nautilus pompilius populations surrounding Australia and the Philippines

et al. 2015

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“…In spite of being heavily biased towards ammonites, as these paired measurements are extremely rare for other groups, the available data set on the relationship between IC and ES size is reasonably complete and sufficient for an initial assessment. For taxonomy we used the reviews of Shevyrev (2006 a , b ), Allcock, Lindgren & Strugnell () and Hoffmann ().…”

Section: Introductionmentioning

confidence: 99%

“…To reconstruct the evolution of cephalopod reproductive strategies this data set was supported by non-paired data of either IC or ES in another 324 species of Ammonoidea,56 Belemnoidea,9 Coleoidea,10 Bactritida,125 Nautilida,6 Oncocerida,34 Orthocerida,9 Pseudorthocerida and 8 Tarphycerida. In spite of being heavily biased towards ammonites, as these paired measurements are extremely rare for other groups, the available data set on the relationship between IC and ES size is reasonably complete and sufficient for an initial assessment. For taxonomy we used the reviews of Shevyrev (2006a,b), Allcock, Lindgren & Strugnell (2014) and Hoffmann (2015).…”

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confidence: 99%

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

2017

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An exhaustive study of existing data on the relationship between egg size and maximum size of embryonic shells in 42 species of extant cephalopods demonstrated that these values are approximately equal regardless of taxonomy and shell morphology. Egg size is also approximately equal to mantle length of hatchlings in 45 cephalopod species with rudimentary shells. Paired data on the size of the initial chamber versus embryonic shell in 235 species of Ammonoidea, 46 Bactritida, 13 Nautilida, 22 Orthocerida, 8 Tarphycerida, 4 Oncocerida, 1 Belemnoidea, 4 Sepiida and 1 Spirulida demonstrated that, although there is a positive relationship between these parameters in some taxa, initial chamber size cannot be used to predict egg size in extinct cephalopods; the size of the embryonic shell may be more appropriate for this task. The evolution of reproductive strategies in cephalopods in the geological past was marked by an increasing significance of small-egged taxa, as is also seen in simultaneously evolving fish taxa.

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“…As for many marine taxa with wide distribution, identification and congruence of the morphological characters need to be reinforce using molecular markers; unfortunately oegopsids do not show high representativity in molecular analysis (Allcock et al 2014). …”

Section: Discussionmentioning

confidence: 99%

Distribution of pelagic squids Abraliopsis Joubin, 1896 (Enoploteuthidae) and Pterygioteuthis P. Fischer, 1896 (Pyroteuthidae) (Cephalopoda, Decapodiformes, Oegopsida) in the Mexican Pacific

Hendrickx

Urbano

Zamorano

2015

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The oegopsid squids Abraliopsis and Pterygioteuthis are abundant and diverse genera with taxonomic and distributional problems. Identification and distribution of species in the Mexican Pacific has been somewhat controversial. Here are provided a large series of new records for Abraliopsis affinis, Abraliopsis falco, Pterygioteuthis gemmata, Pterygioteuthis giardi and Pterygioteuthis hoylei from the Gulf of California and off the SW coast of Mexico. All five species were collected in the central or the southern Gulf of California, or in both. Abraliopsis affinis was found in seven samples with a total of 48 specimens, from 21°59' to 24°53'12"N. Abraliopsis falco was much less represented in the samples (14 specimens) but it was found in 10 localities, four of which correspond to the central-southern Gulf of California (north to 27°44'53"N) and six to SW Mexico (south to 16°49'18"N). In the case of Pterygioteuthis gemmata, only two records (three specimens) were obtained, both in the SW Gulf of California, while Pterygioteuthis giardi (nine specimens) records were all from the central Gulf of California (27°44'53” to 25°39'59"N). In the case of Pterygioteuthis hoylei (nine specimens), material was obtained in six localities, also in a restricted latitudinal range (24°23'48” to 25°56'56"N).

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The contribution of molecular data to our understanding of cephalopod evolution and systematics: a review

Cited by 73 publications

References 216 publications

The genetic structure of Nautilus pompilius populations surrounding Australia and the Philippines

The genetic structure of Nautilus pompilius populations surrounding Australia and the Philippines

Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

Distribution of pelagic squids Abraliopsis Joubin, 1896 (Enoploteuthidae) and Pterygioteuthis P. Fischer, 1896 (Pyroteuthidae) (Cephalopoda, Decapodiformes, Oegopsida) in the Mexican Pacific

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