Andrewsiphius

The first specimen was collected by {{Harvnb|Sahni|Mishra|1972}} who described it as mandibular fragments of Protocetus sloani. {{Harvnb|Sahni|Mishra|1975}} described two new species, Andrewsiphius kutchensis and A. minor based on their previous material and new mandibular fragments. Later researchers interpreted the same mandibular specimens as belonging to Remintonocetus.{{Harvnb|Gingerich|Ul-Haq|Khan|Zalmout|2001}} reinterpreted these specimens as fragments from maxillae, and determined that the described "confluence of the mandibular canals anteriorly" was in fact the narial passages. Gingerich et al. also determined that the variations in size among proposed species were within the normal variation for a single species and therefore attributed a number of referred specimens as belonging to Andrewsiphius sloani.

Gingerich et al. also noted that the type specimen of Kutchicetus minimus came from the same locality as A. sloani and that its distinctive small size was within the variation that could be expected for A. sloani, and Gingerich et al. therefore included K. minimus into A. sloani. Later authors, however, disagreed on this assignment and Kutchicetus is still accepted as a separate genus.{{Paleodb|63095|Kutchicetus}}. Retrieved July 2013.

{{Harvnb|Sahni|Mishra|1972}} named the type species for Dr Robert E. Sloan, Department of Geology, University of Minnesota.{{Harvnb|Sahni|Mishra|1972|p=490}}

File:Humerus femur Andrewsiphius.jpg

Andrewsiphius is similar to but smaller than Kutchicetus (another remingtonocetid); {{Harvnb|Gingerich|Ul-Haq|Khan|Zalmout|2001}} synonymized them, and {{Harvnb|Thewissen|Bajpai|2009}} proposed a new subfamily, Andrewsiphiinae, for the two species. Later authors,E.g., {{Harvnb|Uhen|2010|p=203}} however, still accept both as separate genera.

Andrewsiphius and Kutchicetus share several characteristics not present in other remingtonocetids: an elongated snout that is higher than it is wide; foramina (small holes) on the tip of the snout suggesting the presence of whiskers; eyes located dorsally near the cranial midline, resulting in an appearance of a mammalian crocodile; and a very large sagittal crest overhanging the back of the skull.{{Cite web | last = Switek | first = Brian

| title = A Different Kind of Whale | publisher = Laelaps | url = http://scienceblogs.com/laelaps/2009/10/16/a-different-kind-of-whale/ | date = 16 October 2009 | access-date = 25 July 2013}} Other characteristics make them distinct: the second and third upper and lower premolars are double-rooted in Andrewsiphius but single-rooted in Kutchicetus; the large diastemata in the former are absent the latter; and the tail vertebrae are more robust in Andrewsiphius.{{Harvnb|Thewissen|Bajpai|2009|loc=Abstract}}

Andrewsiphius is, compared to the remgintonocetids Remingtonocetus and Dalanistes, smaller, has a narrower rostrum, and smaller premolars separated by longer diastemata.{{Harvnb|Gingerich|Ul-Haq|Khan|Zalmout|2001|pp=287–9}}

{{Reflist}}

{{Refbegin}}

• {{Cite journal

| last1 = Gingerich | first1 = Philip D

| last2 = Ul-Haq | first2 = Munir

| last3 = Khan | first3 = Intizar Hussain

| last4 = Zalmout | first4 = Iyad S.

| title = Eocene stratigraphy and archaeocete whales (Mammalia, Cetacea) of Drug Lahar in the eastern Sulaiman range, Balochistan (Pakistan)

| year = 2001 | journal = Contributions from the Museum of Paleontology, University of Michigan | volume = 30 | issue = 11 | pages = 269–319

| hdl = 2027.42/48661

| oclc = 50061585 }}

• {{Cite journal

| last1 = Sahni | first1 = Ashok

| last2 = Mishra | first2 = Vijay Prakash

| title = A New Species of Protocetus (Cetacea) from the Middle Eocene of Kutch, Western India

| year = 1972 | journal = Palaeontology | volume = 15 | issue = 3 | pages = 490–5

| url = http://palaeontology.palass-pubs.org/pdf/Vol%2015/Pages%20490-495.pdf | access-date = 25 July 2013

}}{{Dead link|date=April 2017}}

• {{Cite journal

| last1 = Sahni | first1 = Ashok

| last2 = Mishra | first2 = Vijay Prakash

| title = Lower Tertiary vertebrates from western India

| year = 1975 | journal = Monograph of the Paleontological Society of India | volume = 3 | pages = 1–48

| oclc = 3566369 | asin = B0007AL8UE }}

• {{Cite journal

| last1 = Thewissen

| first1 = J.G.M.

| last2 = Bajpai | first2 = Sunil

| title = New Skeletal Material of Andrewsiphius and Kutchicetus, Two Eocene Cetaceans from India

| year = 2009 | journal = Journal of Paleontology | volume = 83 | issue = 5 | pages = 635–63

| doi = 10.1666/08-045.1 | bibcode = 2009JPal...83..635T

| s2cid = 86090504

| oclc = 4908550552 | author1-link = Hans Thewissen

}}

• {{Cite journal

| last = Uhen | first = Mark D.

| title = The Origin(s) of Whales

| year = 2010 | journal = Annual Review of Earth and Planetary Sciences | volume = 38 | issue = 1

| pages = 189–219

| url = http://people.trentu.ca/~sarahdungan/Trent_marine_mammals/Lectures_files/whale%20evolution%20overview.pdf | access-date = 25 July 2013

| doi = 10.1146/annurev-earth-040809-152453 | bibcode = 2010AREPS..38..189U

}}{{Dead link|date=April 2017|url=http://people.trentu.ca/~sarahdungan/Trent_marine_mammals/Lectures_files/whale%20evolution%20overview.pdf}}

{{Refend}}

{{Archaeoceti}}

{{Taxonbar|from=Q5675355}}

Category:Remingtonocetidae

Category:Fossil taxa described in 1975

Category:Monotypic prehistoric cetacean genera

Category:Eocene mammals of Asia