https://zookeys.pensoft.net/articles.php?id=26095

Two new species of crayfish of the genus Cherax from Indonesian New Guinea (Crustacea, Decapoda, Parastacidae)

Zwei neue Arten von Krebsen aus der Gattung Cherax von Indonesien und Papua Neuguinea

Authors

Christian Lukhaup1, Rury Eprilurahman2, Thomas von Rintelen3

1 Waldstrasse 5a, 66999 Hinterweidenthal, Germany 2 Animal Systematics Laboratory, Faculty of Biology, Universitas Gadjah Mada Jl. Teknika Selatan, Sekip Utara Yogyakarta 55281, Indonesia 3 Museum für Naturkunde – Leibniz Institute for Evolution and Biodiversity Science, Invalidenstraße 43, 10115 Berlin, Germany



Figure 10.
C. alyciae sp. n. A holotype male (MZB Cru 4672) from nameless creek, Boven Digoel Regency B idem, colour variation.



Figure 1.
Cherax mosessalossa sp. n. A holotype male (MZB Cru 4675) from Klademak Creek, Sorong City B idem, side view.


Abstract

Two new species of the genus Cherax are described and illustrated. Cherax mosessalossa sp. n., endemic to the Klademak Creek drainage in Sorong, in the western part of the Kepala Burung (Vogelkop) peninsula, West Papua, Indonesia, is described, figured and compared with its closest relatives, Cherax misolicus Holthuis, 1949 and Cherax warsamsonicus. The new species may be easily distinguished from both by the shape of the rostrum, the shape of the chelae, the presence of five cervical spines, the shape of the scaphocerite, and short scattered hairs on the carapace. Cherax alyciae sp. n., endemic to creeks in the Digul River drainage in the eastern part of the Boven Digoel Regency, Papua, Indonesia, is described, figured, and compared with its closest relative, Cherax peknyi Lukhaup & Herbert, 2008. The new species may be easily distinguished from Cherax peknyi by the shape of the chelae, presence of a soft patch on the chelae of the males, and colouration. A molecular phylogeny based on two mitochondrial gene fragments, 16S and COI, supports the morphology-based description of the two new species, which can also be clearly distinguished by sequence differences.



Figure 9.
Klademak Creek, habitat of the new species

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