Callichirus Stimpson, 1866

Hernáez, Patricio, Miranda, Marcel S., Rio, Juliana P. P. & Pinheiro, Marcelo A. A., 2022, A new Callichirus ghost shrimp species from the southwestern Atlantic, long confounded with C. major (Say, 1818) (Decapoda: Axiidea: Callichiridae), Journal of Natural History 56 (9 - 12), pp. 533-563 : 557

publication ID

https://doi.org/ 10.1080/00222933.2022.2067016

publication LSID

lsid:zoobank.org:pub:29450E54-130A-4838-B923-F9676609DB3A

DOI

https://doi.org/10.5281/zenodo.7015752

persistent identifier

https://treatment.plazi.org/id/2F471A5E-0A3D-FFDE-A1F5-43BEC3C5FAE0

treatment provided by

Plazi

scientific name

Callichirus Stimpson, 1866
status

 

Key to the species of the genus Callichirus Stimpson, 1866 ( Figures 8 View Figure 8 , 9 View Figure 9 , 10 View Figure 10 )

1. Ocular peduncle with obtuse tip, not exceeding or slightly exceeding junction between first and second articles of the antennular peduncle ( Figure 8a, d, e View Figure 8 ) ................................ 2

- Ocular peduncle with prominent distomesial projection distinctly exceeding junction between first and second articles of antennular peduncle ( Figure 8b, c, f View Figure 8 ) ..................... 5

2. Ocular peduncle reaching to about 2/3 of the length of the first article of the antennular peduncle ( Figure 8a View Figure 8 ). Male pleopod 2 with endopod and exopod well developed ( Figure 9b View Figure 9 ) ........................................................................................................................ 3

- Ocular peduncle reaching the limit between the first and second articles of antennular peduncle, or a little beyond ( Figure 8d, e View Figure 8 ). Male pleopod 2 with endopod or exopod reduced ( Figure 9d, e View Figure 9 ) ........................................................................................................ 4

3. Male major cheliped dactylus with bifid tip ( Figure 10b View Figure 10 ). Female major cheliped merus armed with ventral hook ( Figure 10c View Figure 10 ) .................................... C. corruptus sp. nov.

- Male major cheliped dactylus simple ( Figure 10a View Figure 10 ). Female major cheliped merus unarmed .............................................................................. Callichirus sp. (Caribbean Colombia)

4. Male pleopod 2 with endopod underdeveloped ( Figure 9e View Figure 9 ) ............ C. santarosaensis

- Male pleopod 2 with exopod reduced ( Figure 9d View Figure 9 ) ...................................... C. major s. str.

5. Antennular peduncle article 2 reaching as far as antennal peduncle article 4 ( Figure 8f View Figure 8 ). Maxilliped 3 with tiny notch at the flexor distal angle of propodus ( Figure 9h View Figure 9 ) ..... .................................................................................................................................................. C. seilacheri

- Antennular peduncle article 2 exceeding antennal peduncle article 4 ( Figure 8b, c View Figure 8 ). Maxilliped 3 without notch on flexor distal margin of propodus ( Figure 9f, g View Figure 9 ) ......... 6

6. Male major cheliped ischium unarmed ventrally ( Figure 10d View Figure 10 ). Telson with small convexity within median emargination ( Figure 10e View Figure 10 ) .............................................. C. garthi

- Male major cheliped ischium armed with a ventral hook ( Figure 10f View Figure 10 ). Telson without convexity within median emargination ( Figure 10h View Figure 10 ) ............................................................ 7

7. Male pleopod 2 with exopod reduced ( Figure 9a View Figure 9 ). Male major cheliped merus unarmed ventrally ( Figure 10g View Figure 10 ) .................................................................................... C. adamas

- Male pleopod 2 with exopod well developed ( Figure 9c View Figure 9 ). Male major cheliped merus armed with ventral hook ( Figure 10f View Figure 10 ) .................................................................. C. islagrande