Unionicola (Unionicolides) calnani Vidrine 1986d. Plates in Vidrine (1996a)

Transcription

1 Unionicola (Unionicolides) calnani Vidrine 1986d Plates in Vidrine (1996a) Synonomy-- Unionicola sp. nov. type 6 in Vidrine (1980a). Unionicola (Unionicolides) calnani Vidrine 1986d, Vidrine 1986e, 1996, Harvey 1998 and Edwards and Vidrine Museum type number(s) and location-- CNC 19108, Canadian National Collections, Biosystematics Research Institute, Ottawa, Canada. Type locality and host-- Holotype (male) found in Cyrtonaias tampicoensis (Lea) from Nueces River at Rte. TX 16, ca. 17 km south of Tilden, McMullen County, Texas, collected 28 May 1973 by S. L. H. Fuller. Etymology-- Named to honor Thomas R. Calnan. Diagnosis-- Character states of the subgenus; dorsum with 2 pairs of small, nearly circular apodemes; posterior coxal group with an incomplete suture; genital field well sclerotized; pedipalps well sclerotized; all legs setose; first walking leg Ge 3 rows of large setae, and Ti with 3 rows of short setae; tarsal claws of first walking legs very moderately bifid; tarsal claws of posterior three pairs of walking legs bifid at tip, with the dorsal and ventral prongs curved and the dorsal prong smaller than but nearly equal in length to the ventral prong; female first walking leg with more setae than that of the male. Male (10 specimens) (all measurements are in micrometers)-- Length including capitulum 1150 ( ); length of posterior coxal group 454 ( ); dorsal lengths of pedipalp segments: Ti 177 ( ); Ta 79 (70-84); dorsal lengths of leg segments: leg I: TFe 200 ( ); Ge 277 ( ); Ti 218 ( ); Ta 157 ( ); leg IV: TFe 226 ( ); Ge 366 ( ); Ti 466 ( ); Ta 435 ( ).

2 Female (6 specimens)-- Length including capitulum 1458 ( ); length of posterior coxal group 553 ( ); dorsal lengths of pedipalp segments: Ti 218 ( ); Ta 98 (85-100); dorsal lengths of leg segments: leg I: TFe 252 ( ); Ge 340 ( ); Ti 275 ( ); Ta 180 ( ); leg IV: TFe 288 ( ); Ge 453 ( ); Ti 552 ( ); Ta 505 ( ). Notes-- Additional specimens were measured from: C. tampicoensis and Disconaias discus (Lea) from Rio Guayalejo at Rte. MX 80 near Maxcoltzin, Tamaulipas, Mexico, collected on 28 January 1982 by D. J. Bereza, S. V. Hensley, and M. F. Vidrine; C. tampicoensis from: 1. Rio Tempoal at Rte. MX 105 between Tempoal and Planton Sanchez, Veracruz, Mexico, collected on 8 February 1982 by D. J. Bereza, S. V. Hensley, R. T. Hensley, and M. F. Vidrine; 2. Rio San Juan at Rte. MX 25 ca. 30 km south of Santiago Tuxtla, Veracruz, Mexico, collected 15 February 1982 by D. J. Bereza, S. V. Hensley, R. T. Hensley, and M. F. Vidrine; 3. Rio Paploapan off Rte. MX 175 ca. 12 km south of Tlacotalpan, Veracruz, Mexico, collected on 17 February 1982 by D. J. Bereza, S. V. Hensley, R. T. Hensley, and M. F. Vidrine. Unionicola calnani usually occurs as a single male and one or 2 females per infested host. It resembles U. fossulata and U. sakantaka, but it has distinctive tarsal claws on its posterior walking legs, which separate it from U. fossulata, and distinctive leg chaetotaxy, which separates it from U. sakantaka. Male chaetotaxy is very close to U. sakantaka, but females have 2 full rows of thick setae on the tibia of the first walking leg. Unionicola calnani has both a unique distribution well into Mexico and a unique host range occurring in 2 very interesting genera, Cyrtonaias and Disconaias. Hosts: Cyrtonaias tampicoensis (Lea): Texas and Mexico (Vidrine 1986d). Disconaias discus (Lea): Mexico (Vidrine 1986d).

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4 Figures from Vidrine (1996):

5 Plate 53: Top left: male leg I. Top right: female leg I. Middle left: male venter. Middle right: female venter. Bottom left: male genital field. Bottom right: female genital field.

6 Plate 54: Top left: male pedipalp. Top right: female pedipalp. Middle left: male leg I. Middle right: tarsus of pedipalp. Bottom left: genu of leg I. Bottom right: tibia and tarsus of leg I.

7 Plate 55: Top left: male venter (composite photo). Top right: tarsal claw of leg I. Middle upper right: tarsal claw of leg II. Middle lower right: tarsal claw of leg III. Bottom left: female venter. Bottom right: tarsal claw of leg IV.

8 New plates: Plate 1: male venter:

9 Plate 2: male venter:

10 Plate 3: male genital field (2 views):

11 Plate 4: pedipalps: Plate 5: male leg I:

12 Plate 6: female venter:

13 Plate 7: female venter:

14 Plate 8: female genital field:

15 Plate 9: pedipalps: Plate 10: female leg I:

16 Plate 11: female leg I: Plate 12: tarsus of leg I: Plate 13: tarsus of leg IV:

17 Plate 14: female venter:

18 Plate 15: male venter:

19 Plate 16: male venter: