Xenosinelobus, Chim & Tong, 2019

Chim, C. K. & Tong, Samantha J. W., 2019, Xenosinelobus balanocolus, a new tanaidid genus and species (Crustacea: Peracarida: Tanaidacea) from barnacles on intertidal rocky shores and seawalls in the Singapore Strait, Zootaxa 4629 (3), pp. 413-427 : 414-415

publication ID

https://doi.org/ 10.11646/zootaxa.4629.3.9

publication LSID

lsid:zoobank.org:pub:91137CFD-31AD-4134-86F8-C63FB03A71F4

DOI

https://doi.org/10.5281/zenodo.5610320

persistent identifier

https://treatment.plazi.org/id/866887F3-FFCA-FF87-FF57-F888AFB045D0

treatment provided by

Plazi

scientific name

Xenosinelobus
status

gen. nov.

Genus Xenosinelobus View in CoL n. gen.

Diagnosis. Four free pleonites; pleonites 1 and 2 each with a complete dorso-transverse row of feather setae; pleonite 5 fused with pleotelson to form an anterior bulge. Antennule terminal article with two or three aesthetascs. Antenna article-5 as short as article-6. Labium outer lobe without terminal process. Left mandible lacinia mobilis with one seta at base; right mandible similar but with a smaller lacinia mobilis. Maxillule palp with three long setae. Epignath with long terminal seta. Pereopods scattered with very fine setae. Pereopod 1 coxa without anterior bulge, but with one spiniform seta; propodus with pinnate inner seta; dactylus with simple inner seta, together with unguis slender and almost straight. Pereopods 2 and 3 dactylus and unguis not fused but claw-like. Pereopod 6 propodus distal margin with row of three flattened denticulate and one setulose setae. Pleopod basis outer and inner margins each with one seta; endopod inner margin with two or three feather setae. Uropod with three articles, and the final article much longer than preceding article. Sexual dimorphism weak, males having longer antennule, longer fourth article of antenna and small denticles on cutting edge of cheliped dactylus.

Remarks. Within the subfamily, Xenosinelobus n. gen. is more closely affiliated to Sinelobus as compared to Parasinelobus by the smaller body size, absence of setal tuft on antennal articles-2 and -4, the lower number of spiniform setae on the carpus of pereopods 2–6, and the lower number of setae on the maxillule palp and pleopod basal article, exopod and endopod ( Table 1 View TABLE 1 ).

Etymology. The genus name refers to its morphological similarity to Sinelobus Sieg, 1980 and to the unusual characteristics that distinguish this species from other genera in the same subfamily, from the Greek “xenos” meaning “stranger”. Gender: masculine.

Type species. Xenosinelobus balanocolus View in CoL n. sp., by original designation.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Tanaidacea

Family

Tanaididae

SubFamily

Sinelobinae

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF