Species New to Science: Akysidae

Showing posts with label Akysidae. Show all posts

Thursday, June 9, 2022

[Ichthyology • 2022] Akysis patrator • Plugging the Gap: Description of A New Akysis Species (Siluriformes: Akysidae) represents A New Record of the Genus from the Mae Klong Drainage in western Thailand

Akysis patrator

Ng, Pawangkhanant & Suwannapoom, 2022

Mae Klong Wasp Catfish || DOI: 10.23788/IEF-1186

facebook.com: Parinya Pawangkhanant

A new species of sisoroid catfish in the genus Akysis is described from the Mae Klong drainage in western Thailand, marking the first record of this genus there. Akysis patrator, new species, can be distinguished from congeners in having the adipose fin preceded by a long, low ridge contacting the base of the last dorsal-fin ray and a colour pattern of a light brown body with a chocolate brown reticulate pattern on its sides.

Akysis patrator

Heok Hee Ng, Parinya Pawangkhanant and Chatmongkon Suwannapoom. 2022. Plugging the Gap: Description of A New Akysis Species represents A New Record of the Genus from the Mae Klong Drainage in western Thailand (Teleostei: Siluriformes: Akysidae). Ichthyol. Explor. Freshwaters. DOI: 10.23788/IEF-1186

facebook.com/HerpGuideParinya/posts/10225985475535293

Tuesday, March 11, 2014

[Ichthyology • 2003] Parakysis notialis • A New Species of akysid Catfish (Siluriformes: Akysidae) from Borneo

Parakysis notialis

Ng & Kottelat 2003

Abstract

Parakysis notialis sp. nov. is described from the Barito River drainage in southern Borneo. It can be distinguished from congeners in having a unique combination of the following characters: head length 26.5–27.0% SL, conical head, presence of median concavity on margin of lower lip, presence of laterosensory canal pore between inner and outer mandibular barbels, branched outer mandibular barbels, branches of inner mandibular barbels separated, deeply forked caudal ﬁn with pointed lobes, 5 pectoral ﬁn rays, 10 branched principal caudal ﬁn rays, sparsely pigmented caudal ﬁn, and absence of light brown saddle from base of posteriormost dorsal ﬁn ray to caudal peduncle.

Key words: Parakysis · Akysidae · New species · Borneo

Ng, Heok Hee; Kottelat, Maurice. 2003. Parakysis notialis, A New Species of akysid Catfish from Borneo (Siluriformes: Akysidae). Ichthyol. Res. 50: 48–51. doi: dx.doi.org/10.1007/s102280300006

http://deepblue.lib.umich.edu/bitstream/handle/2027.42/42446/30500048.pdf

[Ichthyology • 2003] ปลาขยุยยักษ์พรหมพิราม •Acrochordonichthys gyrinus • A New Species of akysid Catfish (Teleostei: Siluriformes) from Yom River, Chao Phraya drainage, Thailand

ขยุยยักษ์พรหมพิราม • Acrochordonichthys gyrinus

Vidthayanon & Ng, 2003

photo: siamensis.org

Acrochordonichthys gyrinus, a new species of akysid catfish belonging to the A. ischnosoma species group, is described from the Chao Phraya River drainage in Thailand. It can be distinguished from congeners by a concave posterior margin of the pectoral fin and the unique combination of the following characteristics: head depth 9.8–11.4% SL; dorsal to adipose distance 7.4–8.6% SL; body depth at anus 8.3–10.5% SL; maximum width of humeral process 16.3% its length; and anterior margin of anal fin and posterior margin of adipose fin straight. This species represents the northernmost distribution of the genus.

Key words: Akysidae, catfish, Yom River, Chao Phraya drainage

ขยุยยักษ์พรหมพิราม

Acrochordonichthys gyrinus Vidthayanon & Ng, 2003

photo: siamensis.org

Vidthayanon, Chavalit; Ng, Heok Hee. 2003. Acrochordonichthys gyrinus, A New Species of akysid Catfish (Teleostei: Siluriformes) from Thailand. Zootaxa. 183: 1–7.

mapress.com/zootaxa/2003f/z00183f.pdf

http://www.fisheries.go.th/it-database/fish/product.php?CatID=16

[Ichthyology • 2001] A Revision of the akysid Catfish genus Acrochordonichthys Bleeker (Teleostei: Siluriformes) of the South-east Asia

The taxonomy of the South-east Asian catfish genus Acrochordonichthys (Akysidae) is revised.The shapes of the snout, humeral process and adipose fins are diagnostic species characters. Only four out of 11 species and one sub-species described prior to this study are considered valid, namely A. rugosus (Bleeker, 1847), A. ischnosoma Bleeker, 1858, A. chamaeleon (Vaillant, 1902), and A. pachyderma Vaillant, 1902. An additional five new species (A. guttatus, A. septentrionalis, A. mahakamensis, A. strigosus and A. falcifer) are described.

Keywords: Akysidae; Acrochordonichthys; South-east Asia; taxonomy

Ng, H. H.; Ng, P. K. L. 2001. A Revision of the akysid Catfish genus Acrochordonichthys Bleeker. Journal of Fish Biology 58 (2): 386–418. doi: dx.doi.org/10.1111/j.1095-8649.2001.tb02260.x

http://deepblue.lib.umich.edu/bitstream/handle/2027.42/75446/j.1095-8649.2001.tb02260.x.pdf