Table 2. History of study of Eocene archaeocetes from localities yielding Pachycetus, a synonym, or a closely related contemporary.

Author	Year	Page	Identification	Country	Locality	North latitude	East longitude	Map symb.	Map label
Brandt	1873 [25]	336	Zeuglodon paulsonii	Ukraine	Chyhyryn	49.07300	32.66200	T	1
Paulson (in Brandt)	1873 [25]	339	Zeuglodon rossicus	Ukraine	Chyhyryn	49.07300	32.66200	—	—
Seeley	1876 [27]	428	Zeuglodon wanklyni	England	Barton Cliff	50.74300	−1.65500	O	2
Van Beneden	1883 [28]	32	Pachycetus robustus	Germany	Helmstedt	52.22900	11.01000	T	3
Van Beneden	1883 [28]	32	Pachycetus humilis	Germany	Helmstedt	52.22900	11.01000	T	—
Lutugin	1894 [33]	147	Zeuglodon sp.	Ukraine	Pereshchepnoy	48.76400	38.43900	P	4
Andrews	1907 [34]	124	Zeuglodon wanklyni	England	Barton Cliff	50.74300	−1.65500	—	—
Stromer	1908 [35]	109	Eocetus schweinfurthi (pt.)	Egypt	Gebel Mokattam	30.02700	31.27300	P	5
Fedorovsky	1912 [36]	280	Zeuglodon rossicus	Ukraine	Koropove	49.58900	36.34600	P	6
Kuhn	1935 [37]	223	’Zeuglodon’ cf. Z. isis	Germany	Trendelbusch	52.18700	10.97900	P	7
Bogachev	1959 [38]	42	Zeuglodon paulsonii	Russia	Khoroshevskaya	47.71900	42.22600	P	8
Halstead and Middleton	1972 [39]	186	Zygorhiza wanklyni	England	Barton Cliff	50.74300	−1.65500	—	—
Lienau	1984 [40]	73	Pachycetus robustus	Germany	Treue	52.17600	10.98400	P	9
Uhen	1999 [26]	514	Eocetus wardii	U.S.A.	Laniers Pit	34.62500	−77.67500	T	10
Gritsenko	2001 [41]	18	Platyosphys einori	Ukraine	Pyrohiv, Kyiv	50.21000	30.32000	T	11
Uhen	2001 [42]	3	Eocetus wardii	U.S.A.	Rocky Point Quarry	34.42500	−77.86830	P	12
Post	2007 [43]	31	Archaeoceti indet.	Netherlands	Scheur 10	51.41310	3.25150	P	13
Uhen and Berndt	2008 [44]	57	Eocetus sp.	Germany	Rohrdorf	47.79694	12.17000	P	14
Weems et al.	2011 [45]	273	’Eocetus’ wardii	U.S.A.	Putneys Mill	37.60400	−77.09200	P	15
Gol’din et al.	2012 [46]	105	’Eocetus’ sp.	Ukraine	Kurenevka, Kyiv	50.49500	30.43100	P	16
Kalmykov	2012 [47]	180	Basilosaurus sp.	Russia	Khoroshevskaya	47.71900	42.22600	—	—
Tesakov et al.	2012 [48]	141	Eocetus sp.	Russia	Khoroshevskaya	47.71900	42.22600	—	—
Zvonok	2012 [49]	87	Basilosauridae indet.	Ukraine	Nagornoye	49.08300	33.13300	P	17
Zvonok	2012 [49]	88	Basilosaurus sp.	Ukraine	Subotiv	49.09200	32.54500	O	18
Zvonok	2012 [49]	88	Basilosaurus sp.	Ukraine	Pywycha	49.20200	33.12200	O	19
Zvonok	2012 [49]	88	Basilosaurus sp.	Ukraine	Nikopol	47.56900	34.39400	O	20
Zvonok	2012 [49]	88	Basilosaurus sp.	Ukraine	Pereshchepyne	49.01500	35.36400	O	21
Zvonok	2012 [49]	88	Platyosphys paulsoni	Ukraine	Buhaivka	49.47700	37.38500	P	22
Zvonok	2012 [49]	88	Archaeoceti	Ukraine	Luhansk	48.50600	39.39300	O	23
Zvonok	2012 [49]	88	Basilosauridae indet.	Russia	Pyatigorsk	43.89900	43.11100	O	24
Gol’din and Zvonok	2013 [50]	255	Basilotritus uheni	Ukraine	Beloskelevaoye	48.45000	39.64000	T	25
Gol’din and Zvonok	2013 [50]	259	Basilotritus sp.	Ukraine	Vlasovka	49.30000	33.26700	P	26
Gol’din and Zvonok	2013 [50]	260	Basilotritus sp.	Ukraine	Velykaya Andrusovka	49.18300	32.91700	P	27
Gol’din et al.	2014 [51]	269	Basilotritus sp.	Ukraine	Nagornoye	49.08300	33.13300	—	—
Gingerich and Zouhri	2015 [24]	280	Platyosphys aithai	Morocco	Sabkha de Gueran	25.07667	−13.90763	T	28
Post et al.	2017 [52]	50	Archaeoceti indet.	North Sea	Scheur 10	—	—	—	—
Mychko and Tarasenko	2020 [53]	314	Basilosauridae indet.	Russia	Amber Combine Quarry	54.86700	19.97100	O	29
Van Vliet et al.	2020 [54]	124	Pachycetus robustus	Germany	Helmstedt and vicinity	—	—	—	—
Davydenko et al.	2021 [55]	70	Basilosauridae incert. sedis	Ukraine	Pyrohiv, Kyiv	50.21000	30.32000	—	—
This study	2022	—	Antaecetus sp.	Egypt	Wadi Rayan WR008	29.08000	30.11900	P	30
This study	2022	—	Antaecetus aithai	Morocco	El Briej	25.45100	−13.72100	P	31

Locality symbols plotted on the map in Fig 1: O, possible Pachycetus (smaller circle); P, specimen referred to Pachycetus or a junior synonym (larger circle); T, type specimen of a species referred to Pachycetus (star). Label column here gives the number associated with each locality on the map in Fig 1.