Research papers

Opisthobranchs from Andaman (2017)

Apte, D.A., Sumer Verma & Digant Desai (2017). An Illustrated checklist of Opisthobranch fauna (Heterobranchia: Mollusca) of Andaman and Nicobar Islands with 32 new records to India. Journal of Bombay Natural History Society, 112(3), Sept-Dec 2015, 127-137. doi: 10.17087/jbnhs/2015/v112i3/114420.

Abstract

The present study was carried out over two years between 2013 and 2015 along the Andaman & Nicobar Islands, and yielded 128 species, of which 30 species are new records to Indian waters. Aglajidae, Actinocyclidae, and Dendrodorididae is represented by 1 species each; Chromodorididae – 17 species, Discodorididae and Polyceridae – 3 species each, and Facelinidae – 4 species. Deeper waters between 25 and 40 m still remain relatively unexplored over vast territory in India in general and Andaman & Nicobar Islands in particular. Thus, more focused studies from these depths may reveal many more undocumented opisthobranch fauna.

Benoit Dayrat, Tricia C. Goulding, Deepak Apte, Vishal Bhave, & Xuan Quang Ngo (2017)

Benoit Dayrat, Tricia C. Goulding, Deepak Apte, Vishal Bhave, & Xuan Quang Ngo (2017). A new genus and four new species of onchidiid slugs from South-East Asia (Mollusca: Gastropoda: Pulmonata: Onchidiidae). Journal of Natural History, DOI: 0.1080/00222933.2017.1347297.

Abstract

The taxonomy of the Onchidiidae has remained extremely confusing for decades. As part of an on-going systematic revision of the entire family, a new genus, Melayonchis Dayrat and Goulding gen. nov., and four new species (Melayonchis eloisae Dayrat sp. nov., Melayonchis siongkiati Dayrat and Goulding sp. nov., Melayonchis annae Dayrat sp.nov., and Melayonchis aileenae Dayrat and Goulding sp. nov.) are described. Species are delineated using an integrative approach, based on morphological characters and DNA sequences. First-handfield observations and pictures of live animals are provided in order to help future species identification. All four Melayonchis species live

in mangrove forests. The geographic distribution of Melayonchis ranges from the Andaman Sea to the South China Sea through the Strait of Malacca. Records are based on entirely new collections from the Andaman Islands, Peninsular Malaysia, Singapore, Brunei Darussalam and Vietnam. The nomenclature of all existing onchidiid species- and genus-group names from that region is addressed, as well as intraspecific character variation within Melayonchis.

Attachments:
Download this file (Dayrat et al. 2017_new species of onchidiid_ Journal of Natural History.pdf)Onchidiid slugs from South-East Asia [ ]8884 Kb

Dayrat B, Goulding TC, Apte D, Bhave V, Comendador J, Ngo X Q, Tan S K, & Tan S H (2016)

Dayrat B, Goulding TC, Apte D, Bhave V, Comendador J, Ngo X Q, Tan S K, & Tan S H (2016). Integrative taxonomy of the genus Onchidium Buchannan, 1800 (Mollusca, Gastropoda, Pulmonata, Onchidiidae). ZooKeys 636: 1–40. doi: 10.3897/zookeys.636.8879.

Abstract

In an effort to clarify the species diversity of onchidiid slugs, the taxonomy of the genus Onchidium Buchannan, 1800 is revised using an integrative approach. New, fresh specimens were collected in a large number of places, including type localities. The genus Onchidium is redefined here as a clade including only three species which are strongly supported by both morphological and molecular data. All three species were already named: the type species O. typhae Buchannan, 1800, O. stuxbergi (Westerlund, 1883), and O. reevesii (J.E. Gray, 1850). With the exception of a re-description of O. typhae published in 1869, all three species are re-described here for the first time. First-hand observations on the color variation of live animals in their natural habitat are provided. The anatomy of each species is described. Important nomenclatural issues are addressed. In particular, Labella Starobogatov, 1976 is regarded as a junior synonym of Onchidium and Labella ajuthiae (Labbé, 1935) and O. nigrum (Plate, 1893) are regarded as junior synonyms of O. stuxbergi. The nomenclatural status of several other species names is discussed as well. Many new records are provided across South-East Asia and precise ranges of geographic distributions are provided for the genus Onchidium and its three species. Distinctive features that help distinguish the genus Onchidium from other onchidiids are provided, as well as an identification key for the three species.

Attachments:
Download this file (Dayrat and Apte et al. 2016 Zookeys.pdf)Dayrat and Apte et al. 2016 Zookeys[ ]12636 Kb

Titiscania limacina from India (2016)

Apte D.A & SayaliI Mavlankar (2016). First record of Titiscania limacina Bergh, 1890 (Mollusca: Gastropoda) from India. Journal of Bombay Natural History Society. 112(3), 22-25, Sept-Dec 2015.

Abstract

Titiscania limacina is being recorded for the first time from Indian waters, making this a valuable contribution to the molluscan fauna of India.

 

Attachments:
Download this file (Titiscania limacina_Apte and Mavlankar.pdf)Titiscania limacina[ ]2010 Kb

Opisthobranchs from Lakshadweep (2015)

Apte D.A, Salahuddin V.K & Bhave V. (2015). Three new records of Opisthobranchs (Mollusca) from Lakshadweep Islands, India. Journal of Bombay Natural History Society, 112 (3), 19-22, Sept-Dec 2015.

Abstract

The present work reports three opisthobranch species, namely Scyllaea pelagica, Goniobranchus alius, and Verconia norba, of which one is a new record to India and all three are new to Lakshadweep Islands.

Attachments:
Download this file (Opisthobranch_Lakshadweep Part 3.pdf)Opisthobranchs from Lakshadweep[Three new records of Opisthobranchs from Lakshadweep Islands.]1521 Kb
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