A comparative assessment of the morphology of Profilicollis altmani (Acanthocephala, Polymorphidae) from crustaceans and shore birds in Peru, with special notes on hook elemental analysis (EDXA), SEM imaging, histopathology, and molecular profile

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Table 1

Morphometrics of cystacanths of Profilicollis altmani from the USA, Peru, Chile, and Uruguay.

Study site	USA		Peru		Chile	Uruguay
Study site	California Pacific	North Carolina Atlantic	Chorrillos, Lima Pacific	Playa de Pasamayo, Lima Pacific	Lenga Pacific	Arachaña beach Atlantic
Host	Emerita analoga	Emerita. talpoida	Emerita analoga	Emerita analoga	Emerita analoga	Emerita brasilensis
Source	Karl (1967)	Nickol et al. (2002)	This study	Mateo et al. (1983)	Balboa et al. (2009)	Rodríguez & D’Elía (2016)
Total body length^*	5300–7810 (750)^**	3986–6017 (4949)	4525–6675 (5555)	5500–7500^***	5000–6500 (5700)	4500–6200 (5533)
Maximum body width	260–400 (360)	624–845 (663)	750–975 (884)	890–1130	470–1490 (1143)	660–915 (755)
Proboscis
Shape	Ovoid	Ovoid	Ovoid	Ovoid	Ovoid	Ovoid
Length	750–800 (Figs. 18, 20)	518–648 (571)	416–728 (632)	450–600 (550)	500–900 (696)	505–730 (608)
Width	400–500 (Figs. 18, 20)	230–364 (269)	250–458 (352)	260–390 (330)	329–600 (456)	383–610 (485)
Rows of hooks	21–35 (7)	28	26–34 (29)	27–33	26–30	26–29
Hook/row	10–15 (13)	12	13–16 (14.5)	13–15	14–16	14–15
Length of hooks
Apical	30–50	34–43 (37)	35–45 (38)	42	56	41–48 (44)
Medial	30–60	41–53 (45)	35–43 (39)	35	73	48–61 (54)
Basal	50–70	43–57 (52)	50–60 (55)	53	90	52–79 (64)
Proboscis receptacle
Length	1720–2860 (2380)	1718–2026 (1868)	1775–2900 (2309)	1870–3000 (2380)	1400–2970 (2562)	1600–2010 (1783)
Width	220–410 (230)	–	200–400 (294)	–	240–470 (338)	318–450 (369)
Neck
Length	1140–1830 (1700)	1000–1740 (1512)	950–1600 (1180)	1000–1600 (1210)	850–1690 (1232)	805–1100 (939)
Width	290–470	336–470 (406)	250–425 (361)	–	350–580 (473)	379–595 (461)
Lemnisci
Length	Variable unequal	1037–1440 (1250)	925–2400 (1580)	1300–1900 (1550)	1290–2000 (1642)	–
Width	–	–	62–250 (155)	–	100–340 (181)	–

Total body length includes the proboscis, neck, and the 3 trunk regions. Specimens with retracted tail are not used. Measurements of each developing trunk region and incipient testes are not included separately because of their extreme variability in the growing cystacanths.

^**

Range (mean) in micrometers in all measurements.

^***

Described as Polymorphus (Profilicollis) bulloki.

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