Ancyronyx minerva Freitag & Jaech , 2007

Freitag, Hendrik, 2013, Ancyronyx Erichson, 1847 (Coleoptera, Elmidae) from Mindoro, Philippines, with description of the larvae and two new species using DNA sequences for the assignment of the developmental stages, ZooKeys 321, pp. 35-64 : 40-42

Ancyronyx minerva Freitag & Jaech, 2007 Figs 2, 5

Ancyronyx minerva Freitag & Jäch, 2007: 50-53 (adult description); Freitag and Pangantihon 2010: 133 (first record Mindoro); Freitag and Balke 2011: 53-58 (larva description), 79 (key); Freitag 2012: 63 (world check list).

Material examined.

1 ♀, 6 L (0.22; 0.25, 2 × 0.29, 0.31) (CFM) "PHIL.: Mindoro, Puerto Galera, NR km 37.2, downstr. Tamaraw Falls; riffle& fall; rocks, woodlitter, roots; sec.veget.; c. 80m asl., 13°27'03"N, 120°59'27"E 22.4.1994, leg. Freitag (302)M"; 1 ♀ [FR015], 1 ♂ [FR033], 1 L (0.31) (ZSM) "PHIL.: Mindoro, San Teodoro, Tukuran Riv.; small lowld.riv.; riffle & run; woodlitter, gravel; sec.veget.; c. 30m asl., 13°25'34"N, 120°58'37"E 23.4.1994, leg. Freitag (303a)M"; 1 ♂ (CFM) "PHIL.: Mindoro, Puerto Galera, NR km 59, downstr. Aninuan Falls; riffle; small mount. riv., boulder, rocks, gravel, woodlitter; sec.veget.; c. 80m asl., 13°29'10"N, 120°54'18"E 24.4.2009, leg. Freitag (304)M"; 1 ♀ pter., 2 L (0.21, 0.25 [FR079, FR080]) (ZSM) "PHIL.: Mindoro Oriental, Municipality Victoria, Brgy. Malayas, Malayas River; W Naujan tributary; sec. veget., submerged wood, riffle, c. 20 m asl., c. 13°09'26"N, 121°18'29"E; 22.2.2010 leg. Freitag & Pangantihon (308a)M"; 1 ♂ pter. (CFM) "PHIL.: Mindoro Oriental, Bongabong, Brgy. Formon, Pastuhan, Tangisan Falls; deep mountain valley, sec. forest, submerged wood, riffle, c. 200 m asl., c. 12°43'N, 121°23'E; 27.10.2011 leg. Freitag (318a)M"; 1 ♀, 2 L (0.24 [FR087], 0.27) (ZSM, CFM) "PHIL.: Mindoro Oriental, Bongabong, Brgy. Formon, Pastuhan, Tangisan Falls; deep mountain valley, sec. forest, gravel & boulders, riffle, c. 200 m asl., c. 12°43'N, 121°23'E; 27.10.2011 leg. Freitag (318)M"; 1 ♀ (CFM) "PHIL: Or. Mindoro, Roxas, Brgy. San Vicente, Baroc River; subm. wood; gravel flood plains; c. 12°37'07"N, 121°24'06"E, 90m asl; leg. Freitag 1 Apr.2013 (BRf)M"; 1 ♂, 1 ♀ (CFM) "PHIL: Or. Mindoro, Roxas, Brgy. San Vicente proper, Taugad River; subm. wood; sec.veget.; c. 12°37'06"N, 121°23'49"E, 100m asl; leg. Freitag 2 Apr.2013 (TR1f)M"; 1 ♂, 1 ♀ 3 L (0.29, 2 × 0.31) (CFM) "PHIL: Or.Mindoro, Roxas, Brgy. San Vicente, Tauga River; rocks, riffle & run; sec.veget.; c. 12°37'18"N, 121°22'58"E, c. 140m asl; leg. Freitag 17.11.2011 (TR2g)M"; 1♂, 1♀, 3 L (0.27, 0.29, 0.31) (CFM): same locality and microhabitat "leg. Freitag & Pangantihon 07.7.2012 (TR2g)M"; 1 ♀ (CFM) "PHIL: Or. Mindoro, Roxas, Brgy. San Vicente, Baroc River tributary Hiyong Creek; bottom gravel, run & riffles; sec.veget.; c. 12°37'27"N, 121°22'48"E, 147m asl; leg. Pangantihon, 29.Jun.2012 (THCc)M"; 2 L (0.24, 0.25) (CFM) "PHIL: Or. Mindoro, Roxas, Brgy. San Vicente, Baroc River tributary Hiyong Creek; subm. root packs, run; sec.veget.; c. 12°37'27"N, 121°22'48"E, 147m asl; leg. Freitag & Pangantihon, 07.Jul.2012 (THCh)M"; 1 L (0.31) (CFM) "PHIL: Or. Mindoro, Roxas, Brgy. San Vicente, Sitio Quirao, Hinundugan tributary Quirao Buhay Creek; rocks, run; 12°36'10"N, 121°23'00"E, 130m asl; leg. Freitag & Pangantihon, 30.06.2012 (HBCg)M".

Distribution.

The species is known from Busuanga, Mindoro and Palawan (Philippines) and is common on these islands.

Remarks.

Morphological variations between the population of different islands are not evident, but the cox1 gene varies in a few more substitutional sites than within a population of one and the same island. The larva was described and illustrated in Freitag and Balke (2011).

Ecology.

Both, adults and larvae, are usually collected from boulder and rock surfaces, or submerged rootpacks in run and riffle sections. The species is predominantly found in clean, small to medium sized permanent streams. ( Freitag and Pangantihon 2010, Freitag and Jäch 2007).