Genus: Xiyuichthys SHAN, LIN, ZHANG, LI & GAI, 2023
Etymology:
= Xiyuaspis non ZHANG, 1986 (trilobite) LIU, ZHU, LIN, LU & GAI, 2019
=Xiyuaspis LIU, ZHU, LIN, LU & GAI, 2019
Etymology: From the type locality, the Achanarras Quarry.

Species: zhangi (LU et al. 2007 [LIU, ZHU, LIN, LU & GAI, 2019]) SHAN, LIN, ZHANG, LI & GAI, 2023
= Nanjianagaspis zhangi LU et al., 2007
= Kalpinolepis zhangi (LU et al., 2007) LIU et al., 2015
= Xiyuaspis zhangi (LU et al. 2007) LIU, ZHU, LIN, LU & GAI, 2019])
Etymology:

Holotype: GMC V 2191a, b

Locality: Tielikewatie village, Kalpin County, Xinjiang Province, China.

Horizon: Tataertag Formation.

Biostratigraphy:

Age: Telychian Stage, Llandovery Epoch, Late Early Silurian.

Material: An incomplete had-shield and its external mould.

Paratype: GMC V 2192: An incomplete head shield.

Referred material:

GMC V 2416.1, 2: 2 incomplete head-shields preserved together on teh same rock.

IVPP V 25445.1a: An incomplete head-shield.

IVPP V 25445.1b: Its exernal mould.

IVPP V 25445.2: Anearly complete ventral rim.

IVPP V 25443.3: A nearly complete corner.

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Species: lixiensis SHAN, LIN, ZHANG, LI & GAI, 2023
Etymology: In reference to Lixi Town, Wuning County, Jiujiang city, Jiangi Province, China, in reference to the fossil site.

Holotype: IVPP V26119.1a, b

Locality: Lixi Town, Wuning County, Jiujiang city, Jiangi Province, China.

Horizon: Qingshui Formation.

Biostratigraphy:

Age: Lower Telychian Stage, Llandovery Epoch, Late Early Silurian.

Material: An incomplete headshield and its external mould.

Partype: IVPP V26119.2a, b: An incomplete headshield and its extenral mould.

Referred material:

IVPP V26119.3: An incompte headshield.

IVPP V26119.4: Incomplte ventral rim.