DOI: 10.5281/zenodo.15135551
title: Appendix 1 in Crayfishes from the Jehol biota

description: Appendix 1. — Continuation.
DescriptionObserved on specimensCarpusshort, about half as long as dactylus,NIGP-DYH-3-6, NIGP-Shen-1,narrower proximally, with a pair of thinNIGP-Shen-4-5, NIGP-dorsal carina, inner side of the carpusShen-12-13, NIGP-Shen-16, NIGP-with two rows of three large spinesShen-18, NIGP-Shen-23, NIGP-Propodusabout 60% as long as cephalothorax, straight index as long as palm (rest of the propodus) fringed by two rows of small tubercles, palm subrectangular, covered in spines and tubercles, inner side of palm fringed many anthrorse spines, outer side and rest of the palm with tubercles rather than spinesShen-26, NIGP-Shen-32, NIGP- Shen-35, NIGP-Shen-38, NIGPShen-39, NIGP-Shen-40, NIGP- Shen-42, NIGP-Shen-71, NIGP- Shen-a-c, NIGP-Shen-g, NIGPShen-RT145, NIGPAS-126337, NIGPAS-126338, NIGPAS-126339, NIGPAS-126342, NIGPAS-126343,Dactylusstraight, about as long as index, with straight occlusal margin fringed by two rows of small tuberclessp8-9, sp11, sp14, sp18-19, sp30, sp31 (not including distal parts), Tohoku-U-57254, Tohoku-U-57272Thoracopod 5Pereiopod 2about 2/3 of the lenght of first pereiopod,NIGP-DYH-6, NIGP-Shen-2-3, NIGP-claw a little smaller than half of the firstShen-12, NIGP-Shen-22, NIGP-pereiopod claw, straight slightly bentShen-40, NIGP-Shen-42, NIGP-distally, with index (fixed finger arisingShen-71, NIGP-Shen-a-c, NIGP-from propodus) forming a slight angleShen-g, NIGP-Shen-RT141,with propodus, not as the straigt clawNIGPAS-126339, NIGPAS-126346,of first pereiopod, similar but less bentNIGPAS-126354, sp2, sp19, sp24-25,than the claw of pereiopod 3Tohoku-U-57272Thoracopod 6Pereiopod 3slightly longer than second pereiopod,NIGP-DYH-6, NIGP-Shen-2-4, NIGP-claw with a long palm, forming 3/4 ofShen-12, NIGP-Shen-32-34, NIGP-the total length of the claw, as long and Shen-66 (gonopore), NIGP-Shen-68,thinner than pereiopod 2 claw, indexNIGP-Shen-71, NIGP-Shen-a-c,forming a slight angle (c. 25°) withNIGP-Shen-g, NIGPAS-126337,the axis of the palm, stout carpus, aNIGPAS-126339, NIGPAS-126354,narrower proximally, slightly wider than sp2, sp9, sp19, sp30 (gonopore),propodus distally, a little less than 1/3Tohoku-U-57254, Tohoku-U-57272of the length of propodus, short coxawith the gonopore opening ventrally infemales, ischium with a curved spine“hook” on the anterior/mesial side inmalesThoracopod 7Pereiopod 4about as long as third pereiopod, longerNIGP-Shen-2-3, NIGP-Shen-18,than second pereiopod, achelate,NIGP-Shen-34, NIGP-Shen-68,propodus about as long as pereiopodNIGP-Shen-71, NIGP-Shen-b-c,3 palm, dactylus curved and about asNIGP-Shen-g, NIGPAS-126337,long as pereiopod 3 dactylus, stoutNIGPAS-126354, sp2, sp5, sp9, sp26carpus, a narrower proximally, slightlywider than propodus distally, a littleless than 1/3 of the length of propodus,ischium with a curved spine “hook” onthe anterior/mesial side in malesThoracopod 8Pereiopod 5slightly shorter than pereiopod 4,NIGP-Shen-12, NIGP-Shen-18, NIGP-achelate, ornamented with short spines, Shen-32-33, NIGP-Shen-35, NIGP-propodus three times the lenght ofShen-68, NIGP-Shen-71, NIGP-Shen-carpus, ischium about as long asa-c, NIGP-Shen-g, NIGPAS-126337,propodus, ischium about 1/3 as long as NIGPAS-126354, sp2, sp5, sp14, sp19,carpus and propodus, very short coxasp26with the gonopode opening ventrally
description: Published as part of Audo, Denis, Kawai, Tadashi, Letenneur, Charlène & Huang, Diying, 2023, Crayfishes from the Jehol biota, pp. 715 in Geodiversitas 45 (24) on page 715, DOI: 10.5252/geodiversitas2023v45a24, http://zenodo.org/record/10376394