Seven New Species of Crayfish of the Genus Cherax (Crustacea, Decapoda, Parastacidae) from Western New Guinea, Indonesia Author Lukhaup, Christian Independent Researcher, Waldstrasse 5 a, 66999 Hinterweidenthal, Germany craykeeper@gmx.de Author Eprilurahman, Rury Animal Systematics Laboratory, Department of Tropical Biology, Faculty of Biology, Universitas Gadjah, Mada, Jl. Teknika Selatan, Sekip Utara, Yogyakarta 55281, Indonesia rurybiougm@ugm.ac.id Author Rintelen, Thomas von Museum für Naturkunde — Leibniz Institute for Evolution and Biodiversity Science, Invalidenstrasse 43, 10115 Berlin, Germany thomas.vonrintelen@mfn.berlin text arthropoda 2025 2025-06-03 3 2 1 55 journal article 314129 10.3390/arthropoda3020010 21ff44ac-4cf0-4fda-bdb4-348f6f989ed0 18484894

Table 2. Morphometric measurement comparisons for the seven species described in the present study (Cherax arguni n. sp., C. bomberai n. sp., C. doberai n. sp., C. farhadii n. sp., C. kaimana n. sp., C. nigli n. sp, and C. veritas n. sp.,), showing means, standard deviation, and range. All measurements are in mm.

	C. arguni		C. bomberai		C. doberai		C. farhadii
Characters	Male (n = 3)	Female (n = 3)	Male (n = 3)	Female (n = 2)	Male	Female	Male (n = 6)	Female (n = 3)
Chela length	58.7 ± 0.9 (57.7–59.9)	43.4 ± 2.9 (39.3–46.3)	38.2 ± 8.5 (28.2–49.0)	33 ± 5.6 (27.4–38.6)	25.8	n/a	40.9 ± 9.5 (30.8–59.6)	28.5 ± 0.4 (28.1–29.1)
Chela width	20.5 ± 0.8 (19.4–21.2)	14.3 ± 0.6 (13.5–15.1)	15.8 ± 3.5 (12.4–20.7)	12.2 ± 1.1 (11.1–13.3)	11.2	n/a	16.2 ± 4.8 (12.3–26.5)	9.8 ± 0.1 (9.7–10.0)
Chela height	7.4 ± 2.9 (3.3–9.7)	6.6 ± 0.5 (6.0–7.3)	8.7 ± 1.8 (6.3–10.8)	7.1 ± 0.5 (6.6–7.6)	7.0	n/a	7.9 ± 2.3 (5.4–12.6)	5.4 ± 0.3 (5.0–5.8)
Dactylus	21.1 ± 0.4 (20.6–21.4)	18.9 ± 1.7 (17.7–20.5)	14.9 ± 3.4 (11.1–19.4)	15 ± 2.8 (12.2–17.8)	10.6	n/a	14.7 ± 2.3 (12.2–18.4)	13.3 ± 0.1 (13.2–13.4)
Ratio of chela length/width	2.8 ± 0.1 (2.7–3.0)	3.0 ± 0.1 (2.9–3.1)	2.4 ± 0.1 (2.3–2.6)	2.7 ± 0.3 (2.4–2.9)	2.3	n/a	2.6 ± 0.3 (2.2–3.0)	2.8 ± 0.0 (2.8–2.9)
Ratio of chela length/dactylus	2.8 ± 0.0 (2.7–2.8)	2.3 ± 0.2 (2.1–2.5)	2.5 ± 0.0 (2.5–2.6)	2.2 ± 0.1 (2.1–2.2)	2.4	n/a	2.7 ± 0.3 (2.3–3.2)	2.1 ± 0.0 (2.1)
Rostrum length	15.7 ± 0.9 (14.6–16.7)	16.6 ± 1.7 (14.6–18.8)	12.4 ± 1.5 (10.9–14.5)	13.1 ± 2.5 (10.6–15.6)	5.2	n/a	13.5 ± 2.0 (9.5–15.9)	12.6 ± 0.8 (12.0–13.8)
Rostrum width	6.7 ± 0.1 (6.6–6.8)	7.3 ± 0.5 (6.6–7.8)	5.2 ± 0.4 (4.7–5.6)	5.8 ± 0.9 (4.9–6.7)	3.6	n/a	6.2 ± 0.8 (5.2–6.9)	5.8 ± 0.4 (5.3–6.3)
Ratio of rostrum length/width	2.3 ± 0.1 (2.2–2.4)	2.2 ± 0.1 (2.1–2.4)	2.3 ± 0.2 (2.0–2.5)	2.2 ± 0.1 (2.1–2.3)	1.4	n/a	2.1 ± 0.2 (1.8–2.4)	2.1 ± 0.1 (2.0–2.2)
Areola width middle	9.8 ± 0.3 (9.6–10.2)	11.6 ± 0.1 (11.5–11.8)	8.0 ± 1.2 (6.6–9.6)	9.4 ± 1.3 (8.1–10.7)	4.5	n/a	9.3 ± 1.0 (7.7–10.8)	8.8 ± 0.4 (8.4–9.3)
Areola length	18.6 ± 1.1 (17.3–19.9)	19.4 ± 0.3 (19.0–19.8)	15.0 ± 2.1 (13.3–17.9)	16.2 ± 1.9 (14.2–18.1)	10.3	n/a	16.7 ± 1.8 (14.1–18.8)	15.1 ± 0.2 (14.8–15.2)
Pleon width	24.4 ± 1.3 (23.0–26.2)	28.4 ± 0.1 (28.3–28.5)	18.8 ± 3.2 (16.3–23.3)	22.05 ± 3.0 (19.0–25.1)	11.7	n/a	21.03 ± 2.3 (17.2–23.1)	20.03 ± 1.5 (18.7–22.4)
Pleon length	70.9 ± 1.6 (69.1–73.0)	76.7 ± 0.2 (76.6–77)	57.0 ± 8.6 (50.4–69.1)	65.3 ± 9.3 (56.0–74.5)	36.1	n/a	62.9 ± 6.4 (52.5–69.7)	58.4 ± 3.3 (54.5–62.6)
Carapace width	27.8 ± 1.0 (27.0–29.2)	28.4 ± 0.4 (28.1–28.9)	21.2 ± 3.1 (18.7–25.6)	21.8 ± 3.3 (18.5–25.0)	12.3	n/a	23.5 ± 2.9 (18.5–26.2)	21.0 ± 1.1 (19.5–21.7)
Carapace length	62.8 ± 2.7 (60.9–66.6)	64.1 ± 2.1 (61.8–66.8)	48.0 ± 7.4 (42.5–58.4)	52.1 ± 8.6 (43.5–60.6)	28.6	n/a	54.3 ± 6.1 (43.0–59.9)	48.0 ± 1.8 (45.8–50.3)
Total length	133.7 ± 4.1 (130.0–139.4)	140.8 ± 2.1 (138.4–143.5)	105.0 ± 15.9 (92.9–127.5)	117.3 ± 17.8 (99.5–135.1)	64.7	n/a	117.2 ± 12.3 (95.5–127.7)	106.3 ± 5.2 (100.3–112.9)