Morphobank

Project 4449: M. S. de la Fuente, I. J. Maniel, P. G. Ruiz, J. Ledesma, M. V. Deraco, C. del Papa, C. Herrera. 2022. A new podocnemidid (Pleurodira: Pelomedusoides) from the Eocene of north-western Argentina, with comments on its evolutionary relationships and palaeoenvironmental settings. Journal of Systematic Palaeontology. 20 (1):2081939.

Specimen: Hydromedusa tectifera (unvouchered)
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Abstract

We report a new small podocnemidid, Gestemys powelli gen. et sp. nov., based on one nearly complete skull, lower jaw, two shells, and remains of the appendicular skeleton belonging to two specimens from the Eocene Geste Formation of the San Antonio de la Cobres Basin, Salta Province, north-western Argentina. As in other podocnemidid genera, Gestemys exhibits a fully developed and medially extensive cavum pterygoidei, an incisura columellae auris enclosing the stapes and Eustachian tube, and lacks an exoccipital quadrate contact. Gestemys powelli bears a huge foramen palatinum posterius and a short pterygoid flange that does not reach the basisphenoid suture, exposing the cavum pterygoid. Phylogenetic analyses place Gestemys powelli as a member of Podocnemididae more closely related to Erymnochelyinae than Podocnemidinae. In regards to the palaeoenvironmental settings of the Palaeogene formations (Maíz Gordo and Geste) of north-western Argentina, at least two features differentiate the palaeoenvironment where G. powelli was recovered and those of other podocnemidid turtles from the Maíz Gordo Formation: 1) G. powelli was found in situ with very little re-working; and 2) in contrast to the muddy rocks indicating the marginal lacustrine setting and humid climate of the Maíz Gordo Formation, G. powelli is associated with a coarse-grained floodplain setting and a dry, temperate climate. Such differences highlight the contrasting environmental dynamics in which podocnemidid turtles lived during the Palaeogene.

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Article DOI: 10.1080/14772019.2022.2081939

Project DOI: 10.7934/P4449, http://dx.doi.org/10.7934/P4449

This project contains	Matrices
11 Media 1 Matrix 1 Document 105 Taxa 11 Specimens 268 Characters Total size of project's media files: 25.27M Download Project SDD File	Total scored cells: 15736 Total media associated with cells: 0 Total labels associated with cell media: 0
	Characters
	Total characters: 268 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 605 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:223/45

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MorphoBank Project 4449

Creation Date:
17 October 2022
Publication Date:
17 October 2022
Matrix downloads: 2

Authors' Institutions

Universidad Nacional de Cordoba (UNC)

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

Universidad Nacional de Tucumán

Museo de Historia Natural de San Rafael

Members

MorphoBank Curator
Project Administrator

105

268

15736
(15234, 0, 502)

Taxonomic Overview for Matrix 'M29025' (105 Taxa)

taxon	unscored cells	scored cells	no cell support	NPA cells	"-" cells	cell images	labels on cell images	member access
[1] † Proganochelys quenstedti Taxon name last Modified on 10/17/22	52	207	207	0	9	0	0	1
[2] † Platychelys oberndorferi Taxon name last Modified on 10/17/22	189	78	78	0	1	0	0	1
[3] † Notoemys laticentralis Taxon name last Modified on 10/17/22	157	110	110	0	1	0	0	1
[4] Pseudemydura umbrina Taxon name last Modified on 10/17/22	85	176	176	0	7	0	0	1
[5] Elseya dentata Taxon name last Modified on 10/17/22	20	234	234	0	14	0	0	1
[6] Emydura macquarii Taxon name last Modified on 10/17/22	23	238	238	0	7	0	0	1
[7] Myuchelys latisternum Taxon name last Modified on 10/17/22	49	212	212	0	7	0	0	1
[8] Acanthochelys radiolata Taxon name last Modified on 10/17/22	62	194	194	0	12	0	0	1
[9] Platemys platycephala Taxon name last Modified on 10/17/22	52	204	204	0	12	0	0	1
[10] Phrynops hilarii Taxon name last Modified on 10/17/22	34	226	226	0	8	0	0	1
[11] Phrynops geoffroanus Taxon name last Modified on 10/17/22	31	231	229	0	8	0	0	1
[12] Mesoclemmys nasuta Taxon name last Modified on 10/17/22	63	197	197	0	8	0	0	1
[13] Chelodina colliei Taxon name last Modified on 10/17/22	26	233	233	0	9	0	0	1
[14] † Chelus colombianus Taxon name last Modified on 10/17/22	213	56	54	0	1	0	0	1
[15] Chelus fimbriatus Taxon name last Modified on 10/17/22	7	256	252	0	9	0	0	1
[16] Hydromedusa tectifera Taxon name last Modified on 10/17/22	15	244	244	0	9	0	0	1
[17] Hydromedusa maximilliani Taxon name last Modified on 10/17/22	170	95	94	0	4	0	0	1
[18] † Bonapartemys bajobarrealis Taxon name last Modified on 10/17/22	207	61	61	0	0	0	0	1
[19] † Prochelidella cerrobarcinae Taxon name last Modified on 10/17/22	208	60	60	0	0	0	0	1
[20] † Yaminuechelys maior Taxon name last Modified on 10/17/22	156	108	108	0	4	0	0	1
[21] † Yaminuechelys gasparinii Taxon name last Modified on 10/17/22	162	102	102	0	4	0	0	1
[22] Pelusios castaneus Taxon name last Modified on 10/17/22	72	192	190	0	6	0	0	1
[23] Pelusios castanoides Taxon name last Modified on 10/17/22	31	228	228	0	9	0	0	1
[24] Pelomedusa subrufa Taxon name last Modified on 10/17/22	6	251	250	0	12	0	0	1
[25] † Araripemys barretoi Taxon name last Modified on 10/17/22	27	228	226	0	15	0	0	1
[26] † Laganemys tenerensis Taxon name last Modified on 10/17/22	72	188	188	0	8	0	0	1
[27] † Euraxemys essweini Taxon name last Modified on 10/17/22	57	204	204	0	7	0	0	1
[28] † Dirqadim schaefferi Taxon name last Modified on 10/17/22	153	112	112	0	3	0	0	1
[29] † Sokatra antitra Taxon name last Modified on 10/17/22	154	109	95	0	5	0	0	1
[30] † Sahonachelys mailakavava Taxon name last Modified on 10/17/22	20	236	233	0	15	0	0	1
[31] † Kurmademys kallamedensis Taxon name last Modified on 10/17/22	67	193	176	0	8	0	0	1
[32] † Sankuchemys sethnai Taxon name last Modified on 10/17/22	186	79	51	0	3	0	0	1
[33] † Jainemys pisdurensis (composite) Taxon name last Modified on 10/17/22	174	94	92	0	2	0	0	1
[34] † Atolchelys lepida Taxon name last Modified on 10/17/22	197	69	69	0	2	0	0	1
[35] † Cearachelys placidoi Taxon name last Modified on 10/17/22	59	206	204	0	5	0	0	1
[36] † Galianemys emringeri Taxon name last Modified on 10/17/22	144	121	120	0	4	0	0	1
[37] † Galianemys whitei Taxon name last Modified on 10/17/22	145	120	119	0	4	0	0	1
[38] † Kinkonychelys rogersi Taxon name last Modified on 10/17/22	178	86	74	0	4	0	0	1
[39] † Foxemys mechinorum Taxon name last Modified on 10/17/22	67	197	195	0	6	0	0	1
[40] † Foxemys trabanti Taxon name last Modified on 10/17/22	133	134	133	0	2	0	0	1
[41] † Polysternon provinciale Taxon name last Modified on 10/17/22	131	133	132	0	5	0	0	1
[42] † Araiochelys hirayamen Taxon name last Modified on 10/17/22	119	147	147	0	2	0	0	1
[43] † Zolhafah bella Taxon name last Modified on 10/17/22	180	86	86	0	2	0	0	1
[44] † Rosasia soutoi Taxon name last Modified on 10/17/22	143	120	120	0	5	0	0	1
[45] † Bothremys maghrebiana Taxon name last Modified on 10/17/22	117	151	149	0	2	0	0	1
[46] † Bothremys cooki Taxon name last Modified on 10/17/22	158	108	108	0	2	0	0	1
[47] † Bothremys arabicus Taxon name last Modified on 10/17/22	200	66	66	0	2	0	0	1
[48] † Bothremys kellyi Taxon name last Modified on 10/17/22	168	98	98	0	2	0	0	1
[49] † Chedighaii hutchisoni Taxon name last Modified on 10/17/22	177	89	89	0	2	0	0	1
[50] † Chedighaii barberi Taxon name last Modified on 10/17/22	120	145	145	0	3	0	0	1
[51] † Taphrosphys sulcatus Taxon name last Modified on 10/17/22	135	131	130	0	3	0	0	1
[52] † Taphrosphys ippolitoi Taxon name last Modified on 10/17/22	159	109	109	0	0	0	0	1
[53] † Taphrosphys congolensis Taxon name last Modified on 10/17/22	190	78	78	0	0	0	0	1
[54] † Acleistochelys maliensis Taxon name last Modified on 10/17/22	148	117	117	0	3	0	0	1
[55] † Azabbaremys moragjonesi Taxon name last Modified on 10/17/22	161	104	104	0	3	0	0	1
[56] † Labrostochelys galkini Taxon name last Modified on 10/17/22	161	107	107	0	0	0	0	1
[57] † Phosphatochelys tedfordi Taxon name last Modified on 10/17/22	146	122	121	0	1	0	0	1
[58] † Ummulisani rutgersensis Taxon name last Modified on 10/17/22	144	123	122	0	2	0	0	1
[59] † Rhothonemys brinkmani Taxon name last Modified on 10/17/22	213	55	55	0	0	0	0	1
[60] † Arenila krebsi Taxon name last Modified on 10/17/22	182	84	84	0	2	0	0	1
[61] † Nigeremys gigantea Taxon name last Modified on 10/17/22	181	84	84	0	3	0	0	1
[62] † Brasilemys josai Taxon name last Modified on 10/17/22	123	140	140	0	5	0	0	1
[63] † Hamadachelys escuilliei Taxon name last Modified on 10/17/22	120	146	146	0	2	0	0	1
[64] † Portezueloemys patagonica Taxon name last Modified on 10/17/22	186	79	79	0	3	0	0	1
[65] † Bauruemys elegans Taxon name last Modified on 10/17/22	23	242	240	0	5	0	0	1
[66] † Cambaremys langertoni Taxon name last Modified on 10/17/22	217	49	49	0	2	0	0	1
[67] † Peiropemys mezzalirai Taxon name last Modified on 10/17/22	142	125	125	0	1	0	0	1
[68] † Lapparentemys vilavilensis Taxon name last Modified on 10/17/22	44	220	220	0	4	0	0	1
[69] † Pricemys caiera Taxon name last Modified on 10/17/22	196	71	71	0	1	0	0	1
[70] Podocnemis vogli Taxon name last Modified on 10/17/22	44	222	220	0	4	0	0	1
[71] Podocnemis lewyana Taxon name last Modified on 10/17/22	58	206	203	0	7	0	0	1
[72] Podocnemis unifilis Taxon name last Modified on 10/17/22	5	264	257	0	6	0	0	1
[73] † Podocnemis erythrocephala Taxon name last Modified on 10/17/22	26	239	238	0	4	0	0	1
[74] Podocnemis expansa Taxon name last Modified on 10/17/22	14	255	251	0	3	0	0	1
[75] Podocnemis sextuberculata Taxon name last Modified on 10/17/22	23	243	239	0	6	0	0	1
[76] Podocnemis bassleri Taxon name last Modified on 10/17/22	152	114	114	0	2	0	0	1
[77] Peltocephalus dumerilianus Taxon name last Modified on 10/17/22	24	242	237	0	7	0	0	1
[78] Erymnochelys madagascariensis Taxon name last Modified on 10/17/22	28	238	233	0	7	0	0	1
[79] † Cerrejonemys wayuunaiki Taxon name last Modified on 10/17/22	148	114	114	0	6	0	0	1
[80] † Dacquemys paleomorpha Taxon name last Modified on 10/17/22	142	118	118	0	8	0	0	1
[81] † UCMP 42008 Taxon name last Modified on 10/17/22	198	68	68	0	2	0	0	1
[82] † Carbonemys cofrinii Taxon name last Modified on 10/17/22	179	85	85	0	4	0	0	1
[83] † Kenyemys williamsi Taxon name last Modified on 10/17/22	210	58	58	0	0	0	0	1
[84] † Turkanemys pattersoni Taxon name last Modified on 10/17/22	76	185	185	0	7	0	0	1
[85] † Neochelys fajumensis Taxon name last Modified on 10/17/22	72	192	189	0	7	0	0	1
[86] † Neochelys arenarum Taxon name last Modified on 10/17/22	102	159	158	0	8	0	0	1
[87] † Neochelys franzeni Taxon name last Modified on 10/17/22	102	166	162	0	4	0	0	1
[88] † Papoulemys laurenti Taxon name last Modified on 10/17/22	79	182	182	0	7	0	0	1
[89] † Mogharemys blackenhorni Taxon name last Modified on 10/17/22	187	79	79	0	2	0	0	1
[90] † Brontochelys gaffneyi Taxon name last Modified on 10/17/22	193	70	70	0	5	0	0	1
[91] † Lemurchelys diasphax Taxon name last Modified on 10/17/22	167	95	95	0	6	0	0	1
[92] † Shweboemys pilgrimi Taxon name last Modified on 10/17/22	183	79	79	0	6	0	0	1
[93] † Stereogenys cromeri Taxon name last Modified on 10/17/22	129	133	132	0	7	0	0	1
[94] † Cordichelys antiqua Taxon name last Modified on 10/17/22	75	186	186	0	7	0	0	1
[95] † Latentemys plowdeni Taxon name last Modified on 10/17/22	160	103	103	0	5	0	0	1
[96] † Bairdemys thalassica Taxon name last Modified on 10/17/22	165	102	102	0	1	0	0	1
[97] † Bairdemys healeyorum Taxon name last Modified on 10/17/22	182	83	83	0	3	0	0	1
[98] † Bairdemys venezuelensis Taxon name last Modified on 10/17/22	72	184	184	0	12	0	0	1
[99] † Bairdemys hartsteini Taxon name last Modified on 10/17/22	137	126	126	0	5	0	0	1
[100] † Bairdemys sanchezi Taxon name last Modified on 10/17/22	137	127	127	0	4	0	0	1
[101] † Bairdemys winklerae Taxon name last Modified on 10/17/22	175	90	90	0	3	0	0	1
[102] † Piramys auffenbergi Taxon name last Modified on 10/17/22	222	46	46	0	0	0	0	1
[103] † Caninemys tridentata Taxon name last Modified on 10/17/22	141	126	126	0	1	0	0	1
[104] † Stupendemys geographica Taxon name last Modified on 10/17/22	103	169	157	0	8	0	0	1
[105] † Gestemys powelli Taxon name last Modified on 10/17/22	73	188	188	0	7	0	0	1

Project downloads

type	number of downloads	Individual items downloaded (where applicable)
Total downloads from project	6
Matrix downloads	2	Matrix (2 downloads);
Project downloads	1
Document downloads	3	Copy of Matrix (3 downloads);