Macrobrachium jelskii,

Vera, Ana Luiza, Carvalho, Fabrício Lopes & Mantelatto, Fernando Luis, 2017, Redescription of the freshwater shrimp Macrobrachium jelskii (Miers, 1877) (Caridea, Palaemonidae), Zootaxa 4269 (1): -1

publication ID

https://doi.org/10.11646/zootaxa.4269.1.2

publication LSID

lsid:zoobank.org:pub:7774D8D9-800E-4B81-AFB9-81F8B63623CE

persistent identifier

http://treatment.plazi.org/id/03C687FF-0402-FF9A-80B4-E350CAEC52BE

treatment provided by

Plazi

scientific name

Macrobrachium jelskii
status

 

Key to differentiate Macrobrachium jelskii  , M. amazonicum  and M. acanthurus 

1 Distal enlargement of the carpus of the second pereiopod gradual ( Figure 6View FIGURE 6 a); rostrum distinctly surpasses the scaphocerite; rostrum has an evident portion without teeth ( Figure 7View FIGURE 7 a); internal pair of posterior spine of the telson at most 2 times longer than the median apex in small individuals; internal pair of posterior spine of the telson does not reach the median apex in adults ( Figure 8View FIGURE 8 a).............................................................................. M. amazonicum 

- Rostrum reach or slightly overreach end of the scaphocerite; rostrum does not have an evident portion without teeth ( Figures 7View FIGURE 7 b and 7c); internal pair of posterior spine of the telson surpasses the median apex and is more than 2 times longer ( Figures 8View FIGURE 8 b and 8c)............................................................................................. 2

2 Carpus of the second pereiopod similar to the chela length, chela longer than half of the carapace length, distal enlargement of the carpus gradual ( Figure 6View FIGURE 6 b)............................................................... M. acanthurus 

- Carpus of the second pereiopod noticeably longer than the chela, distal enlargement of the carpus abrupt ( Figure 6View FIGURE 6 c)..................................................................................................... M. jelskii