Corambis Simon, 1901

Patoleta, Barbara & Żabka, Marek, 2019, Salticidae (Arachnida: Araneae) of New Caledonia: Genus Corambis Simon, 1901, European Journal of Taxonomy 578, pp. 1-18 : 3-5

publication ID	https://doi.org/ 10.5852/ejt.2019.578
publication LSID	lsid:zoobank.org:pub:0BE6D99E-905D-4094-A03F-1C40D3C07CC2
persistent identifier	https://treatment.plazi.org/id/03EF935F-FFDD-CE42-FD93-148DC70FFE7F
treatment provided by	Plazi
scientific name	Corambis Simon, 1901
status

Treatment

Genus Corambis Simon, 1901 View in CoL View at ENA

Corambis Simon, 1901: 605 View in CoL , 609, fig. 728.

Corambis – Berland 1924: 247 View in CoL . — Szűts 2002: 24–26, figs 1–4.

Type species

Hyctia insignipes Simon, 1880 ; by original designation.

Diagnosis

Spiders elongate, narrow and flat. Habitus similar to that of some other astioid genera ( Holoplatys , Ocrisiona , Zebraplatys Żabka, 1992 , Paraplatoides ; Fig. 1 View Fig ), but first legs relatively heavier, chelicerae longer, palpal organ tegulum with a lobe, retrolateral tibial apophysis much larger and accessory glands (ag2) in female genitalia extremely long ( Fig. 2 View Fig ). According to Maddison (2015) the genus is part of Tribe Viciriini within the Astioida clade ( Maddison et al. 2008). Its closest relatives include other New Caledonian genera such as Rhondes , Penionomus and Trite Simton, 1885 ( Fig. 1 View Fig ), and together they confirm local New Caledonian radiation.

Description

Spiders 3.5–13 mm long, thin, sexual dimorphism not distinctive ( Figs 2–8 View Fig View Fig View Fig View Fig View Fig View Fig View Fig ). Cephalothorax almost twice as long as wide, uniformly flat, with no thoracic slope. Coloration in males rather uniformly dark, in females lighter with black eye surroundings. AME lenses twice diameter of ALE. PME tiny, closer to ALE than PLE, PLE equal to or smaller than ALE. Fovea behind PLE, slightly visible. Clypeus very narrow. Chelicerae unidentate, rather massive, maxillae elongate, sternum narrow and long. Abdomen very narrow and much longer than cephalothorax, sides almost parallel. Abdominal pattern with chevrons ( C. insignipes , C. foeldvarii , C. jacknicholsoni sp. nov., C. logunovi sp. nov.) or dark spots ( C. pantherae sp. nov.). Spinnerets and venter not distinctive. Both sexes with very strong first legs, in males with ventral brush of hairs on patella and tibiae. Ventral spines on tibiae in two rows 2-2-2, metatarsi with pairs of strong spines ( Fig. 2B View Fig ). Other legs delicate. Leg formula I-IV-II-III. Male palpal organ tegulum with posterior lobe, seminal duct not meandering, embolus short, fixed at top of tegulum and varying from hooked ( C. insignipes , C. foeldvarii , C. jacknicholsoni sp. nov.) to wide and short ( C. logunovi sp. nov.) (unknown in C. pantherae sp. nov.). Retrolateral tibial apophysis large and spatulate. Female copulatory openings close to epigastric furrow, far apart, oriented laterally ( C. insignipes , C. jacknicholsoni sp. nov., C. logunovi sp. nov., C. pantherae sp. nov.) or posteriorly ( C. foeldvarii ). Spermathecae two-chambered ( C. insignipes , C. logunovi sp. nov., C. pantherae sp. nov.) or three-chambered ( C. foeldvarii , C. jacknicholsoni sp. nov.), located in central part of epigyne, strongly sclerotized. Main spermathecal chambers elongate, with two pairs of accessory glands, ag2 extremely long. Position of ag2 varying from lateral ( C. insignipes , C. foeldvarii , C. jacknicholsoni sp. nov.), through postero-lateral ( C. pantherae sp. nov.) to posterior ( C. logunovi sp. nov.).

Distribution

All species of Corambis are exclusively distributed in NC and the neighboring Loyalty Islands ( Figs 9–10 View Fig View Fig ), and are found in different types of forests. The endemic character of the genus is supported by its DIVA-GIS predicted distribution ( Fig. 11 View Fig ). This modeling shows that Corambis is limited to NC.