Crayfishes from the Jehol biota Author Audo, Denis Centre de Recherche en Paléontologie - Paris (CR 2 P, UMR 7207), MNHN, CNRS, Sorbonne Université, Muséum national d’Histoire naturelle, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) denis.audo@mnhn.fr Author Kawai, Tadashi Hokkaido Research Organization, Central Fisheries Research Institute, 238 Hamanaka, Yoichi, 045 - 8555 Hokkaido (Japan) tadashikawai8@gmail.com Author Letenneur, Charlène Centre de Recherche en Paléontologie - Paris (CR 2 P, UMR 7207), MNHN, CNRS, Sorbonne Université, Muséum national d’Histoire naturelle, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) charlene.letenneur@mnhn.fr Author Huang, Diying State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008 (China) dyhuang@nigpas.ac.cn text Geodiversitas 2023 2023-12-14 45 24 689 719 https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/g2023v45a24.pdf journal article 281942 10.5252/geodiversitas2023v45a24 ccd2ee89-acc4-4fec-97c6-a7895a8ab5ed 1638-9395 10376394 urn:lsid:zoobank.org:pub:73B795BD-23BA-44AA-98CA-0F62DAA3CAD7
Appendix 1. — Continuation.
DescriptionObserved on specimens
Pleonite 1Dorsal partsmoothNIGP-DYH-5, NIGP-Shen-1, NIGP-
Axial carina Tergopleuronnone subquadrate, with a slightly rounded margin, angle slightly acuminate, smaller than the othersShen-4, NIGP-Shen-32, NIGP- Shen-34-35, NIGP-Shen-38-39, NIGP- Shen-42, NIGP-Shen-52, NIGP- Shen-71, NIGP-Shen-a, NIGP-Shen-b, NIGP-Shen-h, NIGP-Shen-RT132,
Pleonite 2Dorsal partsmoothNIGPAS-126346, 126353, sp1-2, sp4,
Axial carinanonesp8-9, sp11, sp20, sp24, sp30, sp31, Tohoku-U-57254, Tohoku-U-57272
Tergopleuronwide, ovoid, extending over s1
tergopleuron anteriorly and s3
tergopleuron posteriorly
Pleonite 3Dorsal partsmooth
Axial carinanone
Tergopleuronsubquadrate, with a slightly rounded
margin, angle slightly acuminate, larger
than s4-s6 tergopleura
Pleonite 4Dorsal partsmooth
Axial carinanone
Tergopleuronsubquadrate, with a slightly rounded
margin, angle slightly acuminate, larger
than s5-s6 tergopleura
Pleonite 5Dorsal partsmooth
Axial carinanone
Tergopleuronsubquadrate, with a slightly rounded
margin, angle slightly acuminate, larger
than s6 tergopleuron
Pleonite 6Dorsal partsmooth
Axial carinanone
Tergopleuronsubquadrate, with a slightly rounded
margin, angle slightly acuminate
Ornamentationcovered in scattered tubercles, coarser
between branchiocardiac grooves
TelsonOutlinesubrectangular, with straight lateralNIGP-DYH-4-6, NIGP-Shen-14, NIGP-
margins and slightly curved posteriorShen-16-19, NIGP-Shen-38-40, NIGP-
marginShen-64, NIGP-Shen-66-67, NIGP-
Surface Diaresiswith a pair of lateral carina, thick and tuberculated anterior to the diaeresis, smooth and thin posterior to diaeresis almost straight, slightly curved laterally, cutting telson at 3/4 of its lengthShen-71, NIGP-Shen-f, NIGP-Shen-g, NIGP-Shen-RT132, NIGP-Shen-RT145, NIGPAS-126345, NIGP-126353, NIGPAS-12354, sp1-2, sp5, sp9, sp11, sp16, sp20, sp24, sp26, sp28, sp29, Tohoku-U-57254
EyesShapeovoid, small from 0.62 to 4.1 mm (3-9 %NIGP-DYH-5, NIGP-Shen-38, NIG-
of CL)Shen-40, sp1, sp4, sp11, sp14, sp22
Ommatidiasquare facets each from 14 µm to 61 µm
long (side of the square)
Setaenone visible
CephalicAntennula a1Basisformed of at least three stockyNIGP-DYH-4, NIGP-Shen-1, NIGP-
appendagescylindrical podomeres, reachingShen-6, NIGP-Shen-12-13, NIGP-
to the second podomere of antennalShen-18, NIGP-Shen-20, NIGP-
endopod, first (proximal) podomereShen-22, NIGP-Shen-23, NIGP-
with a dorsal depression leaving roomShen-26, NIGP-Shen-34, NIGP-
to the eye stalkShen-38, NIGP-Shen-71,
Endopod Exopodshort flagellum, slightly shorter and thinner NIGPAS-126337-126338, than the exopod NIGPAS-126343, NIGPAS-126353, sp4-5, sp8, sp11, sp20, sp22, sp24-25, short flagellum, about 1/3 cephalothorax sp27, sp29-30, Tohoku-U-57254 length