Arenallianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019

Schnabel, Kareen E., Rowden, Ashley A. & Poore, Gary C. B., 2023, A new species of Arenallianassa (Decapoda: Axiidea: Callianassidae) from hydrothermal vents with notes on its ecology and a redescription of Arenallianassa arenosa (Poore, 1975), Memoirs of Museum Victoria (Mem. Mus. Vic.) 82, pp. 55-69 : 58

publication ID

https://doi.org/ 10.24199/j.mmv.2023.82.03

publication LSID

urn:lsid:zoobank.org:pub:542B22BB-6068-4831-AFBB-59880DF3DE0B

DOI

https://doi.org/10.5281/zenodo.10835123

persistent identifier

https://treatment.plazi.org/id/038D191D-BD29-FF9F-01EA-FEC99CA8F9BB

treatment provided by

Felipe

scientific name

Arenallianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019
status

 

Arenallianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019 View in CoL

Arenallianassa Poore et al., 2019: 91 View in CoL View Cited Treatment .— Robles et al., 2020: 118, 128, figs 1 View Figure 1 , 3, 6, 8 View Figure 8 .

Diagnosis. Rostrum obtusely triangular, flat, not reaching cornea. Pleomere 1 tergite with weak transverse ridge. Maxilliped 3 merus wider at ischium-merus suture than long. Male major cheliped merus with prominent truncate or oval hook armed with serrations along lower margin, excavate laterally at base; carpus and propodus flattened, upper and lower margins carinate, blade-like, submarginal mesial face especially of carpus deeply concave; propodus distal margin with deep notch at base of fixed finger. Pereopod 3 propodus rectangular or oval, with broadly rounded free proximal lobe. Male pleopod 2 absent. Uropodal endopod ovoid, longer than wide, anterior margin straight or slightly convex, posterodistal margin evenly convex, with few facial distal spiniform setae; exopod distal margin clearly differentiated from anterior margin, anterodistal corner right-angled. Telson lateral margins convex, subparallel or tapering distally (amended from Poore et al. 2019).

Remarks. The genus is diagnosed by the combination of a blade-like meral hook with serrate margins on the major cheliped of both sexes, an ovoid uropodal endopod, little longer than wide, and a telson that is about as wide as long with rounded posterolateral corners ( Poore et al., 2019). With the addition of A. katrinae sp. nov. the diagnosis is adjusted to consider the different shapes of the pereopod 3 propodus, the distribution of spiniform setae on the uropodal endopod and the difference in the shape of the telson.

Poore’s (1975) and (2004) illustrations of A. arenosa were basic but enabled him to distinguish the species from other Australian callianassid species. Subsequent observations presented in the supplementary description and figures below show the setae on the telson and uropod, notably the distal transverse row of short spiniform setae on the face of the uropodal endopod, a feature in one form or another shown by Poore et al. (2019) and Robles et al. (2020) to be shared with Filhollianassa , Notiax Manning and Felder, 1991 , Paratrypaea , Trypaea Dana, 1852 and Tastrypaea Poore, Dworschak, Robles, Mantelatto and Felder, 2019 .

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Callianassidae

Loc

Arenallianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019

Schnabel, Kareen E., Rowden, Ashley A. & Poore, Gary C. B. 2023
2023
Loc

Arenallianassa Poore et al., 2019: 91

Robles, R. & Dworschak, P. C. & Felder, D. L. & Poore, G. C. B. & Mantelatto, F. L. 2020: 118
Poore, G. C. B. & Dworschak, P. C. & Robles, R. & Mantelatto, F. L. & Felder, D. L. 2019: 91
2019
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