Gaeticinae Davie & Ng, 2007
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https://doi.org/ 10.11646/zootaxa.5476.1.19 |
publication LSID |
lsid:zoobank.org:pub:E4809EE7-3180-4B13-A0B2-3AF72E5D46AD |
persistent identifier |
https://treatment.plazi.org/id/B0360E71-FF81-B76D-45DE-F95EFCC1FD69 |
treatment provided by |
Plazi |
scientific name |
Gaeticinae Davie & Ng, 2007 |
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Subfamily Gaeticinae Davie & Ng, 2007 View in CoL
Remarks. At the time of its establishment, the varunid subfamily Gaeticinae , comprised two genera, Gaetice Gistel, 1848 and Sestrostoma Davie & Ng, 2007 ( Davie & Ng 2007). Shortly thereafter, Naruse & Clark (2009) described the gaeticine genus Gopkittisak Naruse & Clark, 2009 , for Asthenognathus gallardoi Serène & Soh, 1976 and compared it with the enigmatic species Paracleistostoma fossula Barnard, 1955 , which was considered a varunid but with uncertain subfamilial placement ( Ng et al. 2008). Števčić (2011) established the monotypic genus Brankocleistostoma Števčić, 2011 and family Brankocleistostomidae Števčić, 2011 for P. fossula , but without explanation as to why these taxa were necessary. Ng (2012) subsequently synonymised Brankocleistostomidae with Gaeticinae , but regarded Brankocleistostoma as a distinct, monotypic gaeticine genus. In his description of the genus Proexotelson Naruse, 2015 , Naruse (2015) provided a table of diagnostic characters of all gaeticine genera, except for Pseudopinnixa Ortmann, 1894 , which had been added to Gaeticinae by Komai & Konishi (2012). Naruse (2015) also added Acmaeopleura Stimpson, 1858 to Gaeticinae , which thus currently comprises seven genera: Acmaeopleura , Brankocleistostoma , Gaetice , Gopkittisak , Proexotelson , Pseudopinnixa , and Sestrostoma ( Guinot et al. 2018; Poore & Ahyong 2023).
Gaeticinae was initially differentiated from the other two varunid subfamilies by three characters: (1) Mxp3 adapted for filter feeding, with elongate palp (dactylus) bearing long setae; (2) presence of a longitudinal sulcus on the anterior thoracic sternites, lodging the afore-mentioned Mxp3 setae; and (3) fused male pleonites 3–6 ( Davie & Ng 2007). In summary, this varunid subfamily is unique in having Mxp3 and anterior sternites adapted for filter feeding. However, most gaeticine crabs have an anterior sternal depression, rather than a sulcus, to accommodate the long setae of the third maxillipeds ( Komai & Konishi 2012; Naruse 2015; Guinot et al. 2018). Species in almost all gaeticine genera also have relatively squarish or rounded carapaces (see examples in Davie & Ng 2007). Brankocleistostoma and Gopkittisak , which are treated here, are notable exceptions in having a carapace that is transversely rectangular or ovate, and much wider than long.
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Brachyura |
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