DOI: 10.5281/zenodo.15135549
title: Appendix 1 in Crayfishes from the Jehol biota

description: Appendix 1. — Continuation.
Description Observed on specimensAntennaBasipodformed of coxa and basipod; coxa wide, NIGP-DYH-3-6, NIGP-Shen-4, NIGP-a2with a small short spine in the middle Shen-6, NIGP-Shen-12-13, NIGP-of anterior margin, carrying a small oval Shen-16, NIGP-Shen-18, NIGP-nephridiopore ventrally, near posterior Shen-20, NIGP-Shen-22, NIGP-margin; basipodite with lateral margin Shen-23, NIGP-Shen-32, NIGP-forming a curved spine extending Shen-34, NIGP-Shen-38, NIGP-slightly outward anterolaterally, visible Shen-68, NIGP-Shen-71, NIGP-dorsally near the eye Shen-RT-145, NIGPAS-126337-126338,Endopodfirst three podomeres stocky, 2-3 thicker NIGPAS-126342-126343, than flagellum, first podomere with NIGPAS-126353, sp1-5, sp8, an oblique anterior margin, second sp11, sp14-15, sp18-20, sp24-25, podomere longest of the three first sp27, sp29-30, Tohoku-U-57254, podomeres, with a slightly angular, Tohoku-U-57272convex, anterior margin, third podomereslightly narrower than the two othersand reaching further anteriorly thanrostrum, flagellum about 1.5 timeslonger than cephalothorax and about 3times thicker than antennular flagellaExopodreaching as far as the base of antennal(scaphocerite)flagellum, with a thick, acute outermargin with a few small lateral spines,inner margin thinMandibleIncisor/molarhemicircular, concave dorsally and NIGP-DYH-3, NIGP-DYH-6, NIGP-Shen-1,processesconvex ventrally, oclusal margin NIGP-Shen-12-13, NIGP-Shen-18,straight with a few large, NIGP-Shen-32-33, NIGP-Shen-35,rounded teeth NIGP-Shen-38, NIGP-Shen-71,Palp Coxal bodyshort, ending in a distally slightly NIGP-Shen-RT145, NIGPAS-126337, rounded dactylus NIGPAS-126345, NIGPAS-126354, sp5, sp7, sp10, sp30, Tohoku-U-57254 as wide (in dorsoventral view) as incisorprocess, extending obliquely from theincisor processMaxilla 1not visible / preserved NoneMaxilla 2not visible / preserved NoneThoracicThoracopod 1Maxilliped 1not visible / preserved NoneappendagesThoracopod 2Maxilliped 2not visible / preserved NoneThoracopod 3Maxilliped 3leg-like, reaching to the base of first NIGP-Shen-29, NIGP-Shen-35,pereiopod propodus, four last NIGP-Shen-71, NIGP-Shen-a-c,podomeres subcylindrical, ischium a NIGPAS-126337, NIGPAS-126342,little more than 1/3 of 3rd maxilliped NIGPAS-126354, sp2-3, sp8total length, subrectangular, slightlyflattened, and with a thin row of spineson the inner margin (crista dentata)Thoracopod 4Coxapoorly preserved in all specimens None= Pereiopod 1Basispoorly preserved in all specimens NoneIschiuma little shorter than merus NIGPAS-126354Meruswider distally, about as long as palm NIGP-Shen-4-5, NIGP-Shen-12, NIGP-(propodus excluding index), with an Shen-16-17, NIGP-Shen-23, NIGP-inner/inferior margin fringed with a row Shen-26, NIGP-Shen-32-35, NIGP-of short spines with a slightly larger Shen-62, NIGP-Shen-66, NIGP-spine anteriorly; upper margin straight Shen-71, NIGP-Shen-a-c, NIGP-and strengthened by a thin carina Shen-RT145, NIGPA-126340, NIGPA-126354, sp2-7, sp14, sp20, sp22, sp24,sp25, sp30, sp31, Tohoku-U-57254,Tohoku_U_57272
description: Published as part of Audo, Denis, Kawai, Tadashi, Letenneur, Charlène & Huang, Diying, 2023, Crayfishes from the Jehol biota, pp. 714 in Geodiversitas 45 (24) on page 714, DOI: 10.5252/geodiversitas2023v45a24, http://zenodo.org/record/10376394