DOI: 10.5281/zenodo.15146644
title: TABLE 1 in A new genus and species of Eusiridae (Crustacea, Amphipoda, Amphilochidea) from bathyal sediments off the southwestern Gulf of Mexico

description: TABLE 1. Major morphological differences between Pseudorhachotropis longipalpus gen. nov., sp. nov. and the known Eusiridae genera worldwide.
GeneraBodyAccessory flagellumMandible molarMandible palpCoxa 1Coxa 4 posterior lobeGnathopodsPereopodsTelsonCleonardoSmooth1-articulate; elongateStrongly triturativeArticle 1 very short; 2–3 variablesQuadrate; unproduced anteriorlyPresentNot or scarcely eusiridElongate; slenderElongate; cleff half lengthDoroteaSmooth1-articulate; shortSlightly triturativeArticle 1 short: 2–3 subequal in length.Quadrate; unproduced anteriorlyRudimentaryNot eusirid; propodus palm obliquePereopods 5–7 basis wideElongate 1/3 cleftEusirellaNone1-articulate,Slightly triturative or simpleArticle 1 and 3 shortStrongly produced anteriorlyNoneNot eusirid; carpus elongatePereopods 3–7 slender; dactylus simpleCleft less than half-length or incisedEusirogenesSlightly carinate1-articulateStrongly triturativeArticle 1 shortNot produced anteriorlyWeaklyNot eusiridPereopods 3–7 elongate; simpleWeakly cleftEusiropsisSmooth1-articulate; vestigialSlightly triturativeArticle 1 shortNot produced anteriorlyPresentEusirid formPereopods 3–7 elongateElongate; weakly cleftEusirusSmooth1-articulate; elongateStrongly triturativeArticle 1 shortNot produced anteriorlyPresentEusirid formPereopods 3–7 elongate; simpleElongate; weakly cleftHarcledoSmoothAbsentStrongly triturativeArticle 1 shortNot produced anteriorlyWeaklyNot eusiridPereopods 3–7 elongate; simpleElongate; cleftMetarhachotropisSmoothvestigialColumnar, slightly triturativeArticle 1 shortProduced anteriorlyWeaklyNot eusiroidPereopods 3–7 elongate; basis of 7 wideElongate; cleftMeteusiroidesPartially toothedAbsentStrongly triturativeArticle 1 shortSlightly produced anteriorlyPresentNot eusiridPereopods 3–7 elongate; simpleElongate; cleftPareusirogenesSmoothAbsentColumnar; triturativeArticle 1 shortNot produced anteriorlyNoneEusirid formPereopods 3–4 shorter than 7VariableRhachotropisCarinate- toothed1–2 articulate; shortStrongly ttriturativeArticle 1 shortStrongly produced anteriorlyNone or weaklyNot eusiridPereopods 3–7 elongate; simpleElongate; cleft to entireSennaiaPartially toothed.AbsentNo triturativeArticle 1 shortNot produced anteriorlyNoneNot eusiridPereopods 5–7 slender; with bifid dactylusElongate; 3 x longer than wideTriquetramanaSmooth1-articulateStrongly triturativeArticle 1 shortNot produced anteriorlyPresentEusirid formPereopods 3–7 slender; 7 wide proximallyElongate; deeply cleftPseudorhachotropis gen. nov.Carinate- toothed5-articulate, longNo triturative with large robust setaeArticle 1 long; subequal in length 2Slightly produced anteriorlyNoneNot eusiridPereopods narrow; 3–4 shorter than restAs long as wide; “V" inverted shape
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description: Published as part of Ortiz, M., Winfield, I. & Chazaro-Olvera, S., 2024, A new genus and species of Eusiridae (Crustacea, Amphipoda, Amphilochidea) from bathyal sediments off the southwestern Gulf of Mexico, pp. 577-578 in Zootaxa 5468 (3) on page 577, DOI: 10.11646/zootaxa.5468.3.9, http://zenodo.org/record/12189321