Table 1 in Description of two new epigean species of the genus Hyalella S. I. Smith, 1874 (Crustacea: Amphipoda: Hyalellidae) from Jalisco, Mexico
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Table 1. Comparison between the closest Mexican species of the genus Hyalella Hyalella marysolae sp. nov.Hyalella morronei sp. nov.Hyalella azteca (de Saussure, 1858)Hyalella maya Marrón-Becerra, Hermoso-Salazar and Solís-Weiss, 2018Hyalella cenotensis Marrón-Becerra, Hermoso-Salazar and Solís-Weiss, 2014 (female)Hyalella tepehuana Marrón-Becerra, Hermoso-Salazar and Rivas, 2020LocalityTajo (river)Teuchitán (river)VeracruzAktun-Ha (cenote)Aktun-Ha (cenote)Durango (river)Total body length (mm)4.857.83.85−4.15.35.4−5.7Dorsal projections or carinae on pleon 1−2Present (short)AbsentPresentPresent (short)Present (short)PresentHead length vs second pereoniteReaching halfReaching two thirdsReaching halfReaching halfEqual in lengthReaching halfEye formSubquadrate/roundedSubquadrateRoundedSubtriangularAbsentSubtriangularAntenna 1 length vs. relative body lengthReaching the middle of fifth pereoniteReaching the fifth pereoniteReaching the middle of third pereoniteReaching one-third of third pereoniteReaching the middle of third pereoniteOverreaching the middle of third pereoniteAntenna 1 peduncle vs. body lengthReaching one third of first pereoniteReaching half of first pereoniteReaching half of first pereoniteReaching beyond half of first pereoniteReaching half of first pereoniteOverreaching the middle of first pereoniteAntenna 1 proportion, articlesof peduncle1.6:1.3:11.5:1.2:11.6:1.25:11.4:1.3:11.7:1.3:11.5:1.4:1Antenna 1 flagellum, numberof articles12107−9979−11Antenna 1 aesthetasc in flagellum on articles4−11 (1 pair)4−5 (1), 6−7 (1 pair), 8−9 (1)3−6 (1 pair), 7−8 (1)−−4−1 (1 pair), 8−11 (1)Antenna 2 lengthAlmost half of total body lengthAlmost half of total body lengthLess than one third total body lengthAlmost half of total body lengthAlmost one third of total body lengthSlightly longer than one third total body lengthAntenna 2 length vs. total body lengthAlmost reaching the seventh pereoniteAlmost reaching the seventh pereoniteReaching the fourth pereoniteAlmost reaching middle of sixth pereoniteReaching one-third of fourth pereoniteReaching middle of fifth pereoniteAntenna 2 flagellum number of articles15148−1010811−12Antenna 2, flagellum relative length vs. peduncle1.5×1.8×1.1×1.2×1.35×1.25×Palp of maxilla 1With setulesWithout setulesWith setulesWith setulesWith setulesWith setules
表1 墨西哥近缘透明钩虾属(Hyalella)物种比较 | 特征项 | 玛丽索透明钩虾(Hyalella marysolae)新种 | 莫龙内透明钩虾(Hyalella morronei)新种 | 阿兹特克透明钩虾(Hyalella azteca)(de Saussure, 1858) | 玛雅透明钩虾(Hyalella maya,Marrón-Becerra、Hermoso-Salazar与Solís-Weiss, 2018) | 锡诺特透明钩虾(Hyalella cenotensis,Marrón-Becerra、Hermoso-Salazar与Solís-Weiss, 2014,雌性) | 特佩华透明钩虾(Hyalella tepehuana,Marrón-Becerra、Hermoso-Salazar与Rivas, 2020) | |---|---|---|---|---|---|---| | 采集地 | 塔霍河(Tajo) | 特乌奇特兰河(Teuchitán) | 韦拉克鲁斯(Veracruz) | 阿克通哈天坑(Aktun-Ha) | 阿克通哈天坑(Aktun-Ha) | 杜兰戈河(Durango) | | 体全长(mm) | 4.85 | 7.8 | 3.85−4.1 | 5.3 | 5.4 | 5.7 | | 第1-2腹节背突或背棱 | 具(短小) | 无 | 具 | 具(短小) | 具(短小) | 具 | | 头长与第2胸节之比 | 约为第2胸节的1/2 | 约为第2胸节的2/3 | 约为第2胸节的1/2 | 约为第2胸节的1/2 | 与第2胸节等长 | 约为第2胸节的1/2 | | 眼形 | 近方形/圆形 | 近方形 | 圆形 | 近三角形 | 无 | 近三角形 | | 第1触角长相对体长比例 | 延伸至第5胸节中部 | 延伸至第5胸节 | 延伸至第3胸节中部 | 延伸至第3胸节的1/3处 | 延伸至第3胸节中部 | 超过第3胸节中部 | | 第1触角柄节相对体长比例 | 延伸至第1胸节的1/3处 | 延伸至第1胸节的1/2处 | 延伸至第1胸节的1/2处 | 超过第1胸节的1/2处 | 延伸至第1胸节的1/2处 | 超过第1胸节中部 | | 第1触角柄节节段比例 | 1.6:1.3:1 | 1.5:1.2:1 | 1.6:1.25:1 | 1.4:1.3:1 | 1.7:1.3:1 | 1.5:1.4:1 | | 第1触角鞭节节数 | 12 | 10 | 7−9 | 9 | 7 | 9−11 | | 第1触角鞭节感觉毛着生节段 | 第4−11节(1对) | 第4−5节具1根、第6−7节具1对、第8−9节具1根 | 第3−6节具1对、第7−8节具1根 | 无 | 无 | 第1−4节(1对)、第8−11节(1根) | | 第2触角长 | 约为体全长的1/2 | 约为体全长的1/2 | 不足体全长的1/3 | 约为体全长的1/2 | 约为体全长的1/3 | 略长于体全长的1/3 | | 第2触角长相对体长比例 | 几乎延伸至第7胸节 | 几乎延伸至第7胸节 | 延伸至第4胸节 | 几乎延伸至第6胸节中部 | 延伸至第4胸节的1/3处 | 延伸至第5胸节中部 | | 第2触角鞭节节数 | 15 | 14 | 8−10 | 10 | 8 | 11−12 | | 第2触角鞭节与柄节长度比 | 1.5倍 | 1.8倍 | 1.1倍 | 1.2倍 | 1.35倍 | 1.25倍 | | 第1颚足须肢 | 具小鬃 | 无小鬃 | 具小鬃 | 具小鬃 | 具小鬃 | 具小鬃 |



