Oregoniidae, Garth, 1958

GUINOT, DANIÈLE, TAVARES, MARCOS & CASTRO, PETER, 2013, Significance of the sexual openings and supplementary structures on the phylogeny of brachyuran crabs (Crustacea, Decapoda, Brachyura), with new nomina for higher-ranked podotreme taxa, Zootaxa 3665 (1), pp. 1-414 : 128

publication ID	https://doi.org/10.11646/zootaxa.3665.1.1
publication LSID	lsid:zoobank.org:pub:8358B363-BEE3-416D-96CA-8614E38B61D5
persistent identifier	https://treatment.plazi.org/id/03BB9C75-FF96-FFED-FF78-FB1EFC71F919
treatment provided by	Felipe (2021-08-25 03:06:50, last updated by Plazi 2023-11-04 18:44:43)
scientific name	Oregoniidae
status

Treatment

Family Oregoniidae View in CoL

The male gonopore is coxal. The penis is very short and is only protected by the abdomen ( Fig. 1A View FIGURE 1 ). See Monophyletic Heterotremata: Superfamily Majoidea ; Affinities between Inachoididae and Inachidae .

It should be noted Chionoecetes is known to include at least five species, with two groups based on vertical distribution: C. opilio (“snow crab”) and C. bairdi (“Tanner crab”) in shallow waters on continental shelves (see Watanabe & Marumaya 1999), C. japonicus Rathbun, 1932 (“red snow crab”), C. angulatus Rathbun, 1893 (“triangle Tanner crab”), C. tanneri Rathbun, 1893 (“grooved Tanner crab”), and C. pacificus Sakai, 1978 ( Sakai 1978, as C. japonicus pacificus ) (see Ng, Guinot & Davie 2008: 124). Recent molecular analyses of the red-snow-crab species complex have shown that C. japonicus must be synonymised with C. angulatus and corroborated that C. pacificus was “an evolutionarily independent species that should be given full species recognition as C. pacificus ” ( Azuma et al. 2011: 291, 292).

References

Azuma, N., Grant, W. S., Templin, W. D., Kunihiro, Y., Mihara, E., Yanagimoto, T. & Abe, S. (2011) Molecular phylogeny of a redsnow-crab species complex using mitochondrial and nuclear DNA markers. Zoological Science, 28, 286 - 292. http: // dx. doi. org / 10.2108 / zsj. 28.286

Ng, P. K. L., Guinot, D. & Davie, P. J. F. (2008) Systema Brachyurorum: Part 1. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, suppl. 17, 1 - 286. [updates at http: // rmbr. nus. edu. sg / research / cotw / supplement 17. php]

Sakai, T. (1978) Decapod Crustacea from the Emperor Seamount Chain. Researches on Crustacea, Suppl. 8, 1 - 40.

Watanabe, Y. & Marumaya, S. (1999) Growth of the Tanner crab, Chionoecetes bairdi Rathbun, on the Pacific coast of southern Hokkaido. Scientific Reports of the Hokkaido Fisheries Experiment Station, 55, 173 - 183. [In Japanese, with English abstract]

Figures

FIGURE 1. A, Anatomical relationships of penis and gonopods in Brachyura exemplified by Chionoecetes opilio (Fabricius, 1788) (Oregoniidae) (modified from Beninger et al. 1991: fig. 1C; G1 basal setae not figured); B–D, schematic representation of the dispositions of male gonopore, penis, and ejaculatory duct (indicated by dotted line) in Brachyura: B, C, perforation of P5 coxa by the ejaculatory duct: B, coxal gonopore, with penis emerging from P5 coxa (Podotremata and Heterotremata pro parte); C, coxo-sternal condition, with coxal gonopore and penis emerging at level of thoracic sternal suture 7/8 (Heterotremata pro parte); D, E, perforation of thoracic sternum by ejaculatory duct: D, sternal gonopore at the suture 7/8 level; E, sternal gonopore far from suture 7/8, in posteriormost location in relation to sternite 8. a1, abdominal somite 1; cx5, P5 coxa; g, gonopore; G1, first gonopod; G2, second gonopod; p, penis; p5, fifth pereopod; 7, 8, thoracic sternites 7, 8; 7/8, thoracic sternal suture 7/8. Scale bar: 1 mm (A).