Eucalliax Manning and Felder, 1991

Poore, Gary C. B., Dworschak, Peter C., Robles, Rafael, Mantelatto, Fernando L. & Felder, Darryl L., 2019, A new classification of Callianassidae and related families (Crustacea: Decapoda: Axiidea) derived from a molecular phylogeny with morphological support, Memoirs of Museum Victoria (Mem. Mus. Vic.) 78, pp. 73-146 : 127

publication ID

https://doi.org/ 10.24199/j.mmv.2019.78.05

publication LSID

urn:lsid:zoobank.org:pub:263C1363-0ADA-4972-9224-AC690A1FD238

persistent identifier

https://treatment.plazi.org/id/038BBA5B-F268-080B-FF3D-B162A95CFCBF

treatment provided by

Felipe

scientific name

Eucalliax Manning and Felder, 1991
status

 

Eucalliax Manning and Felder, 1991

Eucalliax Manning and Felder, 1991: 781–783 (partim).— Ngoc-Ho, 2003: 489–490 (partim).— Sakai, 2011: 502–503 (partim).— Hyžný and Hudáčková, 2012: 12–14 View Cited Treatment (partim).— Sakai, 2017a: 1122 (partim).— Sakai, 2018: 742.

Type species. Callianassa quadracuta Biffar, 1970 , by original designation.

Diagnosis. Anterior dorsal carapace with median ridge posterior to rostrum and submedian pair of oblique ridges. Maxilliped 3 ischium and merus less than twice as long as wide at their articulation. Male major cheliped with palm about twice as long as carpus, 1.5 times as long as wide; minor chela slightly smaller, with elongate fingers; major cheliped carpus upper margin with 2 distal sharp spines in both sexes. Male pleopod 1 article 1 with distal long setae; article 2 blade like, with bifid apex, sometimes obscure; without appendix interna. Male pleopod 2 appendix interna minute; appendix masculina

4 times as long as wide, attached near apex of endopod reaching, or exceeding tip of endopod. Uropodal endopod triangular, anterior margin strongly convex, posterior margin straight. Telson convex-sided, widest near midpoint, posterior margin slightly excavate; with transverse crest.

Remarks. The most obvious characters distinguishing the only species, Eucalliax quadracuta , from other eucalliacids is the triangular uropodal endopod and the male pleopod 2 with its appendix masculina well exceeding the endopod.Re-examination by us ( PCD) showed the presence of a minute appendix interna (fig. 19w); Sakai’s figure (1999a; fig. 30c) is misleading.

Eucalliax was differentiated initially from Calliax simply “in having the chelipeds equal and similar”, the two genera being placed in the same new subfamily ( Manning and Felder, 1991). The genus was treated as a synonym of Calliax by Sakai (1999a, 2005b) without justification but revived later ( Sakai, 2011). Sakai (2017a) differentiated Eucalliax from Eucalliaxiopsis Sakai, 2011 View in CoL on differences in male pleopods 1 and 2 but not from other genera.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Callianassidae

Loc

Eucalliax Manning and Felder, 1991

Poore, Gary C. B., Dworschak, Peter C., Robles, Rafael, Mantelatto, Fernando L. & Felder, Darryl L. 2019
2019
Loc

Eucalliax

Sakai, K. 2018: 742
Sakai, K. 2017: 1122
Hyzny, M. & Hudackova, N. 2012: 12
Sakai, K. 2011: 502
Ngoc-Ho, N. 2003: 489
Manning, R. B. & Felder, D. L. 1991: 783
1991
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