Morphobank

Project 5217: P. J. Wagner. 1997. Patterns of morphologic diversification among the Rostroconchia. Paleobiology. 23 (1):115-150.

Specimen: † Hippocardia herculea (unvouchered)
View: whole specimen (fossil)

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Abstract

Morphologic diversification among rostroconch molluscs is explored using multiple phylogenies derived from different methods. In addition to strict parsimony, phylogenetic estimates were derived using four different methods that employ stratigraphic data. The resultant phylogenies are generally very similar to one another and to the phylogeny proposed by Pojeta and Runnegar (1976). All estimates (including the Pojeta and Runnegar estimate) imply much lower morphologic separations among post-Ordovician rostroconchs (measured here as the frequency of character state change per branch) than among Cambro-Ordovician rostroconchs. However, the data do not suggest that morphologic evolution became more constrained among rostroconchs as a whole, but instead suggest a reduced characteristic rate of morphologic change in the clade that happened to survive the end-Ordovician extinction. Likelihood ratio tests provide strongest support for the hypothesis that morphologic evolution was more constrained within a derived subclade (corresponding to previous definitions of the Conocardioidea, minus the Eopteriidae) than it was in a broad paraphylum (corresponding to the Ribeirioidea + Eopteriidae). Estimates from each of the phylogenetic methods lead to the same conclusions. Various metrics indicate that the pattern is not due to poor sampling of Cambro-Ordovician species and thus merits a biological explanation. Nonphylogenetic analyses of morphologic disparity suggest a similar history of morphologic evolution, including the apparent difference in characteristic rates of morphologic evolution between paraclade and subclade.

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Article DOI: 10.1017/S0094837300016675

Project DOI: 10.7934/P5217, http://dx.doi.org/10.7934/P5217

This project contains	Matrices
2 Media 1 Matrix 1 Document 43 Taxa 2 Specimens 131 Characters Total size of project's media files: 52.53k Download Project SDD File	Total scored cells: 5004 Total media associated with cells: 0 Total labels associated with cell media: 0
	Characters
	Total characters: 131 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 568 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:92/39

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MorphoBank Project 5217

Creation Date:
21 April 2024
Publication Date:
29 April 2024
Project views: 356

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Shreya Jariwala
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5004
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Taxonomic Overview for Matrix 'M29796' (43 Taxa)

taxon	unscored cells	scored cells	no cell support	NPA cells	"-" cells	cell images	labels on cell images	member access
[1] † Bransonia foxi Last Modified in 04/21/24	16	64	64	0	51	0	0	1
[2] † Mulceodens schneideri Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[3] † Mulceodens wilsoni Last Modified in 04/21/24	15	86	86	0	30	0	0	1
[4] † Mulceodens johnstoni Last Modified in 04/21/24	17	78	78	0	36	0	0	1
[5] † Mulceodens jaanussoni Last Modified in 04/21/24	16	85	85	0	30	0	0	1
[6] † Bransonia? sibleyensis Last Modified in 04/21/24	11	88	88	0	32	0	0	1
[7] † Bransonia hydei Last Modified in 04/21/24	16	79	79	0	36	0	0	1
[8] † Pseudoconocardium polymitarium Last Modified in 04/21/24	16	85	85	0	30	0	0	1
[9] † Pseudoconocardium ?snideri Last Modified in 04/21/24	15	84	84	0	32	0	0	1
[10] † Pseudoconocardium cordatum Last Modified in 04/21/24	16	86	86	0	29	0	0	1
[11] † Pseudoconocardium lanterna Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[12] † Bransonia wilsoni Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[13] † Bransonia robustum Last Modified in 04/21/24	15	84	84	0	32	0	0	1
[14] † Pseudoconocardium licharewi Last Modified in 04/21/24	16	86	86	0	29	0	0	1
[15] † Hippocardia antiqua Last Modified in 04/21/24	16	81	81	0	34	0	0	1
[16] † Hippocardia limatula Last Modified in 04/21/24	18	82	82	0	31	0	0	1
[17] † Hippocardia pygmaea Last Modified in 04/21/24	15	88	87	0	29	0	0	1
[18] † Hippocardia oweni Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[19] † Hippocardia? zeileri Last Modified in 04/21/24	9	94	88	0	34	0	0	1
[20] † Hippocardia bohemica Last Modified in 04/21/24	16	86	86	0	29	0	0	1
[21] † Hippocardia cunea Last Modified in 04/21/24	7	96	96	0	28	0	0	1
[22] † Hippocardia costatus Last Modified in 04/21/24	18	77	77	0	36	0	0	1
[23] † Bigalea clathra Last Modified in 04/21/24	16	85	85	0	30	0	0	1
[24] † Hippocardia curta Last Modified in 04/21/24	15	85	85	0	31	0	0	1
[25] † Hippocardia monroica Last Modified in 04/21/24	15	86	86	0	30	0	0	1
[26] † Hippocardia bella Last Modified in 04/21/24	19	83	82	0	30	0	0	1
[27] † Hippocardia herculea Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[28] † Hippocardia hibernica Last Modified in 04/21/24	15	85	85	0	31	0	0	1
[29] † Hippocardia fusiformis Last Modified in 04/21/24	16	84	84	0	31	0	0	1
[30] † Hippocardia herricki Last Modified in 04/21/24	16	82	82	0	33	0	0	1
[31] † Aphelakardia alternistriata Last Modified in 04/21/24	15	83	83	0	33	0	0	1
[32] † Pseudomulceodens cancellatus Last Modified in 04/21/24	12	84	84	0	35	0	0	1
[33] † Conocardium attenuatum Last Modified in 04/21/24	15	84	84	0	32	0	0	1
[34] † Conocardium normale Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[35] † Conocardium pseudobellum Last Modified in 04/21/24	15	87	87	0	29	0	0	1
[36] † Conocardium ventricosum Last Modified in 04/21/24	16	83	83	0	32	0	0	1
[37] † Conocardium alaeforme Last Modified in 04/21/24	16	83	83	0	32	0	0	1
[38] † Conocardium elongatum Last Modified in 04/21/24	4	94	94	0	33	0	0	1
[39] † Conocardium inflatum Last Modified in 04/21/24	16	86	86	0	29	0	0	1
[40] † Arceodomus glabrata Last Modified in 04/21/24	15	82	82	0	34	0	0	1
[41] † Conocardium aff. elongatum Last Modified in 04/21/24	15	83	83	0	33	0	0	1
[42] † Arceodomus prolata Last Modified in 04/21/24	12	85	85	0	34	0	0	1
[43] † Arceodomus langenheimi Last Modified in 04/21/24	16	78	78	0	37	0	0	1

Project views

type	number of views	Individual items viewed (where applicable)
Total project views	356
Media views	89	Media search (71 views); M903443 (10 views); M903444 (8 views);
Matrix views	26	Matrix landing page (21 views); Wagner 1997 (5 views);
Project overview	30
Documents list	21
Taxon list	89
Views for media list	30
Bibliography	19
Specimen list	52