A new genus and species of pinworm (Nematoda, Oxyuridae) from the gray mouse opossum, Tlacuatzin canescens

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Table 2

Measurements of type specimens used in the characterization and description of Tlacuatzoxyuris simpsoni, parasite of the gray opossum Tlacuatzin canescens (Allen, 1893) endemic to Mexico. Specimens were collected in the locality of Cruz Pintada, Morelos (18°27′58″N, 99°2′16″W, 1016 m), with the exception of AMNH IZC 331457, Tlacuatzoxyuris sp., from Las Tejas: Oaxaca (16°21′3.69″N, 95°20′3.86″W, 117 m).

Specimen	Allotype	Female 1	Female 3	Female 4	Female 5	Female 6	Female 7	Female 8	Female 9	Holotype	Male 2	Male 3	Male 4	Male 5	AMNH IZC 331457
Body length	2630	2427	2416	1715	1721	1452	1608	1619	1548	1477	1229		1216	1294	1023
Maximum width	163	170	201	123	138	131	138	111	194	155	107		113	145	130
Cephalic vesicle length	0	124	113	109	106	102	101		94	94	79	73	89	84	70
Cephalic vesicle width	68	69	61	59	66	59	58		60	65	50	55	54	63	49
Depth of stoma	5	8	5	9	6	8	7		6	–	9	7	7	7	3
Pharynx	–	–	–	–	–	–	4	8	10	–	11	13	8	11	9
Pharynx width	–	–	–	–	–	–	–	12	10	–	14	16	11	13	23
Esophagus length	256	250	251	220	225	216	231	237	220	–	186	196	175	189	179
Isthmus	13	10	10	13	13	16	16	20	11	–	13	9	11	11	9
			25	16	18	15	16	14	14	–	14	14	14	14	13
Corpus length	176	157	159	138	138	129	156	155	122	–	109	130	110	123	120
Corpus width	44	41	43	33	33	29	28	29	30	–	27	29	25	28	29
Bulb length	69	70	71	60	63	57	56	57	64	–	52	56	46	49	53
Bulb width	70	72	69	56	56	51	49	48	55	–	45	46	44	46	48
Distance anterior end to:
Nerve ring	91	106	112	98	100	83	91	85	86	102	87	89	89	73	89
Excretory pore	504	452	480	351	337	322	341	469		418			324	342	286
Vulva	591	538	594	428	425	388	411	505	405
Testis										570			472	474	280
Start area rugosa										718	710		629	569	537
Spicule length										90	88	84	81	88	65
Spicule width										5	6	5	6	5
Gubernaculum										35	50	42	45	35	44
										5	4	4	5	4	5
Ovejector	87	86	–	–	–	–	–	–	–
Post anal/cloacal terminus	166	348	415	363	372	245	271	347	413	52	46	45	42	45	31

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