Project 5433: X. Shan, M. Zhu, W. Zhao, Z. Pan, P. Wang, Z. Gai. 2020. A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China. PeerJ. 8:e9008.
Abstract
Galeaspids are an endemic clade of jawless stem-gnathostomes known as ostracoderms. Their existence illuminates how specific characteristics developed in jawed vertebrates. Sinogaleaspids are of particular interest among the galeaspids but their monophyly is controversial because little is known about Sinogaleaspis xikengensis. Newly discovered sinogaleaspids from the Lower Silurian of Jiangxi, China provide a wealth of data and diagnostic features used to establish the new genus, Rumporostralis gen. nov., for Sinogaleaspis xikengensis. A morphological study showed that the sensory canal system of sinogaleaspids had mosaic features similar to those of three known galeaspids. There are 3–8 pairs of transverse canals in the Sinogaleaspidae, which suggests that the sensory canal system of galeaspid probably had a grid distribution with transverse canals arranged throughout the cephalic division. Phylogenetic analysis of Galeaspida supports the monophyly of the Sinogaleaspidae, consisting of Sinogaleaspis, Rumporostralis, and Anjiaspis. However, Shuyu and Meishanaspis form another monophyletic group, Shuyuidae fam. nov., which is outside all other eugaleaspidiforms. We propose a cladistically-based classification of Galeaspida based on our analysis.Read the article »
Article DOI: 10.7717/peerj.9008
Project DOI: 10.7934/P5433, http://dx.doi.org/10.7934/P5433
| This project contains | Matrices |
|---|---|
Download Project SDD File  | Total scored cells: 1971 Total media associated with cells: 0 Total labels associated with cell media: 0 |
| Characters | |
| Total characters: 59 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 134 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:59/0 |
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MorphoBank Project 5433
MorphoBank Project 5433
- Creation Date:
30 July 2024 - Publication Date:
31 July 2024
Authors' Institutions
- Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), CAS
- Shandong University of Science and Technology
- University of Chinese Academy of Sciences
- CAS Center for Excellence in Life and Paleoenvironment
Members
| member name | taxa |
specimens |
media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
| Kate Heim Project Administrator | 45 | 1 | 1 | 59 | 0 | 0 | 1971 (1971, 0, 0) | 0 | 0 | 0 | ||||
Taxonomic Overview for Matrix 'M30025' (45 Taxa)
| taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
| [1] † Ateleaspis Taxon name last Modified on 07/30/24 | 37 | 22 | 22 | 0 | 0 | 0 | 0 | 1 |
| [2] † Anjiaspis Taxon name last Modified on 07/30/24 | 9 | 50 | 50 | 0 | 0 | 0 | 0 | 1 |
| [3] † Antiquisagittaspis Taxon name last Modified on 07/30/24 | 10 | 49 | 49 | 0 | 0 | 0 | 0 | 1 |
| [4] † Asiaspis Taxon name last Modified on 07/30/24 | 12 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
| [5] † Bannhuanaspis Taxon name last Modified on 07/30/24 | 16 | 43 | 43 | 0 | 0 | 0 | 0 | 1 |
| [6] † Changxingaspis Taxon name last Modified on 07/30/24 | 14 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
| [7] † Damaspis Taxon name last Modified on 07/30/24 | 13 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [8] † Dayongaspis Taxon name last Modified on 07/30/24 | 14 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
| [9] † Dongfangaspis Taxon name last Modified on 07/30/24 | 12 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
| [10] † Duyunolepis Taxon name last Modified on 07/30/24 | 27 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
| [11] † Gantarostraspis Taxon name last Modified on 07/30/24 | 11 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
| [12] † Geraspis Taxon name last Modified on 07/30/24 | 12 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
| [13] † Hanyangaspis Taxon name last Modified on 07/30/24 | 18 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
| [14] † Hunanaspis Taxon name last Modified on 07/30/24 | 27 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
| [15] † Kwangnanaspis Taxon name last Modified on 07/30/24 | 21 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [16] † Laxaspis Taxon name last Modified on 07/30/24 | 13 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [17] † Lopadaspis Taxon name last Modified on 07/30/24 | 16 | 43 | 43 | 0 | 0 | 0 | 0 | 1 |
| [18] † Lungmenshanaspis Taxon name last Modified on 07/30/24 | 21 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
| [19] † Macrothyraspis Taxon name last Modified on 07/30/24 | 10 | 49 | 49 | 0 | 0 | 0 | 0 | 1 |
| [20] † Meishanaspis Taxon name last Modified on 07/30/24 | 10 | 49 | 49 | 0 | 0 | 0 | 0 | 1 |
| [21] † Microhoplonaspis Taxon name last Modified on 07/30/24 | 25 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
| [22] † Nanpanaspis Taxon name last Modified on 07/30/24 | 11 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
| [23] † Pentathyraspis Taxon name last Modified on 07/30/24 | 13 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [24] † Polybranchiaspis Taxon name last Modified on 07/30/24 | 11 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
| [25] † Qingmenaspis Taxon name last Modified on 07/30/24 | 22 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
| [26] † Sanchaspis Taxon name last Modified on 07/30/24 | 8 | 51 | 51 | 0 | 0 | 0 | 0 | 1 |
| [27] † Sanqiaspis Taxon name last Modified on 07/30/24 | 14 | 45 | 45 | 0 | 0 | 0 | 0 | 1 |
| [28] † Shuyu Taxon name last Modified on 07/30/24 | 9 | 50 | 50 | 0 | 0 | 0 | 0 | 1 |
| [29] † Rumporostralis xikengensis Taxon name last Modified on 07/30/24 | 7 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
| [30] † Sinogaleaspis Taxon name last Modified on 07/30/24 | 7 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
| [31] † Sinoszechuanaspis Taxon name last Modified on 07/30/24 | 9 | 50 | 50 | 0 | 0 | 0 | 0 | 1 |
| [32] † Wenshanaspis Taxon name last Modified on 07/30/24 | 9 | 50 | 50 | 0 | 0 | 0 | 0 | 1 |
| [33] † Wumengshanaspis Taxon name last Modified on 07/30/24 | 24 | 35 | 35 | 0 | 0 | 0 | 0 | 1 |
| [34] † Yunnanogaleaspis Taxon name last Modified on 07/30/24 | 7 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
| [35] † Zhaotongaspis Taxon name last Modified on 07/30/24 | 13 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [36] † Stephaspis Taxon name last Modified on 07/30/24 | 12 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
| [37] † Platyventaspis Taxon name last Modified on 07/30/24 | 38 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
| [38] † Nanningaspis Taxon name last Modified on 07/30/24 | 39 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
| [39] † Gumuaspis Taxon name last Modified on 07/30/24 | 13 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
| [40] † Nochelaspis Taxon name last Modified on 07/30/24 | 8 | 51 | 51 | 0 | 0 | 0 | 0 | 1 |
| [41] † Tridensaspis Taxon name last Modified on 07/30/24 | 15 | 44 | 44 | 0 | 0 | 0 | 0 | 1 |
| [42] † Pterogonaspis Taxon name last Modified on 07/30/24 | 5 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
| [43] † Eugaleaspis Taxon name last Modified on 07/30/24 | 8 | 51 | 51 | 0 | 0 | 0 | 0 | 1 |
| [44] † Dunyu Taxon name last Modified on 07/30/24 | 8 | 51 | 51 | 0 | 0 | 0 | 0 | 1 |
| [45] † Rumporostralis shipanensis Taxon name last Modified on 07/30/24 | 26 | 33 | 33 | 0 | 0 | 0 | 0 | 1 |