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

Currently Viewing:
MorphoBank Project 5217

Creation Date:
21 April 2024
Publication Date:
29 April 2024

Authors' Institutions

National Museum of Natural History, Smithsonian Institution

Members

Shreya Jariwala
Project Administrator

131

5004
(3633, 0, 1371)

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 Taxon name last Modified on 04/21/24	16	64	64	0	51	0	0	1
[2] † Mulceodens schneideri Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[3] † Mulceodens wilsoni Taxon name last Modified on 04/21/24	15	86	86	0	30	0	0	1
[4] † Mulceodens johnstoni Taxon name last Modified on 04/21/24	17	78	78	0	36	0	0	1
[5] † Mulceodens jaanussoni Taxon name last Modified on 04/21/24	16	85	85	0	30	0	0	1
[6] † Bransonia? sibleyensis Taxon name last Modified on 04/21/24	11	88	88	0	32	0	0	1
[7] † Bransonia hydei Taxon name last Modified on 04/21/24	16	79	79	0	36	0	0	1
[8] † Pseudoconocardium polymitarium Taxon name last Modified on 04/21/24	16	85	85	0	30	0	0	1
[9] † Pseudoconocardium ?snideri Taxon name last Modified on 04/21/24	15	84	84	0	32	0	0	1
[10] † Pseudoconocardium cordatum Taxon name last Modified on 04/21/24	16	86	86	0	29	0	0	1
[11] † Pseudoconocardium lanterna Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[12] † Bransonia wilsoni Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[13] † Bransonia robustum Taxon name last Modified on 04/21/24	15	84	84	0	32	0	0	1
[14] † Pseudoconocardium licharewi Taxon name last Modified on 04/21/24	16	86	86	0	29	0	0	1
[15] † Hippocardia antiqua Taxon name last Modified on 04/21/24	16	81	81	0	34	0	0	1
[16] † Hippocardia limatula Taxon name last Modified on 04/21/24	18	82	82	0	31	0	0	1
[17] † Hippocardia pygmaea Taxon name last Modified on 04/21/24	15	88	87	0	29	0	0	1
[18] † Hippocardia oweni Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[19] † Hippocardia? zeileri Taxon name last Modified on 04/21/24	9	94	88	0	34	0	0	1
[20] † Hippocardia bohemica Taxon name last Modified on 04/21/24	16	86	86	0	29	0	0	1
[21] † Hippocardia cunea Taxon name last Modified on 04/21/24	7	96	96	0	28	0	0	1
[22] † Hippocardia costatus Taxon name last Modified on 04/21/24	18	77	77	0	36	0	0	1
[23] † Bigalea clathra Taxon name last Modified on 04/21/24	16	85	85	0	30	0	0	1
[24] † Hippocardia curta Taxon name last Modified on 04/21/24	15	85	85	0	31	0	0	1
[25] † Hippocardia monroica Taxon name last Modified on 04/21/24	15	86	86	0	30	0	0	1
[26] † Hippocardia bella Taxon name last Modified on 04/21/24	19	83	82	0	30	0	0	1
[27] † Hippocardia herculea Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[28] † Hippocardia hibernica Taxon name last Modified on 04/21/24	15	85	85	0	31	0	0	1
[29] † Hippocardia fusiformis Taxon name last Modified on 04/21/24	16	84	84	0	31	0	0	1
[30] † Hippocardia herricki Taxon name last Modified on 04/21/24	16	82	82	0	33	0	0	1
[31] † Aphelakardia alternistriata Taxon name last Modified on 04/21/24	15	83	83	0	33	0	0	1
[32] † Pseudomulceodens cancellatus Taxon name last Modified on 04/21/24	12	84	84	0	35	0	0	1
[33] † Conocardium attenuatum Taxon name last Modified on 04/21/24	15	84	84	0	32	0	0	1
[34] † Conocardium normale Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[35] † Conocardium pseudobellum Taxon name last Modified on 04/21/24	15	87	87	0	29	0	0	1
[36] † Conocardium ventricosum Taxon name last Modified on 04/21/24	16	83	83	0	32	0	0	1
[37] † Conocardium alaeforme Taxon name last Modified on 04/21/24	16	83	83	0	32	0	0	1
[38] † Conocardium elongatum Taxon name last Modified on 04/21/24	4	94	94	0	33	0	0	1
[39] † Conocardium inflatum Taxon name last Modified on 04/21/24	16	86	86	0	29	0	0	1
[40] † Arceodomus glabrata Taxon name last Modified on 04/21/24	15	82	82	0	34	0	0	1
[41] † Conocardium aff. elongatum Taxon name last Modified on 04/21/24	15	83	83	0	33	0	0	1
[42] † Arceodomus prolata Taxon name last Modified on 04/21/24	12	85	85	0	34	0	0	1
[43] † Arceodomus langenheimi Taxon name last Modified on 04/21/24	16	78	78	0	37	0	0	1

Project downloads

type	number of downloads	Individual items downloaded (where applicable)
Total downloads from project	1
Document downloads	1	Wagner 1997 (Original PBDB Matrix) (1 download);