Glyphocrangon longleyi Schmitt 1931

Glyphocrangon longleyi Schmitt, 1931

(Figs. 9, 10)

Glyphocrangon longleyi Schmitt, 1931: 393.— Bullis 1956: 10.— Felder et al. 2009: 1061.

Material examined. BATO stn 6, ♂ 4, ♀ 1, ovigerous ♀ 1; stn10, ♂ 2, ♀ 3, ovigerous ♀ 1; stn 15, ♀ 1; stn 34, ♂ 1; stn 35, ♂ 1, ♀ 3; stn 48, ♂ 1, ♀ 1; stn 49, ♀ 1; stn 53, ♂ 7, ♀ 6, ovigerous ♀ 4, stn 54, ♀ 1; stn 65, ♂ 8, ♀ 1, ovigerous ♀ 1. BIOREPES1 stn 47, ♂ 5, ♀ 4, ovigerous ♀ 3. BIOREPES2 stn 10, ♀ 2; stn 11, ♀ 2; stn 12, ♂ 1; stn 15, ♀ 1; stn 23, ♂ 2; stn 24, ♂ 3, ♀ 5, ovigerous ♀ 1; stn 25, ♂ 1, ♀ 5; stn 32, ♀ 2, ovigerous ♀ 3; stn 32b, ♂ 1, ♀ 1, ovigerous ♀ 1; stn 37, ♂ 1, ♀ 1; stn 38, ♂ 9, ♀ 10, ovigerous ♀ 2. BIOREPES3 stn A2, ♀ 1, ovigerous ♀ 3; stn A11, ♀ 10, ovigerous ♀ 7, stn A12, ♂ 4, ♀ 1; stn A24, ♀ 1; stn A25, ♂ 1, ♀ 5, ovigerous ♀ 5; stn B1, ♂ 5, ♀ 8, ovigerous ♀ 1; stn B2, ♀ 1, ovigerous ♀ 3; stn B4, ♂ 3, ♀ 2, ovigerous ♀ 1; stn B5, ♂ 1, ♀ 1, ovigerous ♀ 1; stn B6, ovigerous ♀ 2; stn C1, ♂, ♀ 5, ♀ 6, ovigerous ♀ 5; stn C5, ♀ 1; stn C6, ♂ 9, ovigerous ♀ 13; stn C7, ♂ 1, ♀ 1; stn D1, ♀ 5, ovigerous ♀ 6. COBERPES stn A2, ♂ 49, ♀ 79, ovigerous ♀ 39 (measured 10 individuals of each sex); stn A3, ♂ 23, ♀ 22, ovigerous ♀ 6; stn A11, ♂ 6, ♀ 1; stn B2, ♂ 14, ♀ 38, ovigerous ♀ 7; stn B3, ♂ 6, ♀ 8, ovigerous ♀ 2; stn B13, ♂ 5, ♀ 2; stn Ω2, ovigerous ♀ 5; stn Ω3, ♂ 24; stn Ω6, ♂ 1, ovigerous ♀ 2. COBERPES 2011 stn B3, ♂ 1, ♀ 1, ovigerous ♀ 1; stn B4, ♂ 2, ♀ 1, ovigerous ♀ 2; stn C3, ♀ 2, ovigerous ♀ 1; stn D5, ♀ 1; stn D10, ♂ 3, ovigerous ♀ 1; stn D11, ♂ 4.

Overall Geographic and Bathymetric Distribution. East of Florida; Gulf of Mexico (NW, NE, SW, SE); Caribbean Sea; from 300 to 867 m depth (Felder et al. 2009).

Distribution in Southwestern and Southeastern Gulf of Mexico. G. longleyi was collected in: Tamaulipas, off Bravo, San Fernando and Soto La Marina rivers, and off Laguna Madre (WSW); in Veracruz, off the Pánuco and Coatzacoalcos rivers; in Tabasco, in front of Grijalva-Usumacinta rivers (SSW); in Yucatán, off the area of Alacranes reef, and Laguna Rosada; and in Quintana Roo, off Ría Lagartos (SSE); from 671.9 to 1144.0 m depth on clay and shell sediment (Fig. 9).

Remarks. G. longleyi was the most abundant species of the Glyphocrangonidae with a total of 602 individuals. The maximum abundance occurred during the summer in the area off Coatzacoalcos and Tonalá rivers, and Veracruz between 359.0 and 443.8 m depth. There was a high ratio of females to males (1.81:1), and the ovigerous females represented 33.5% of the total f number. The male size range was 12.7–27.8 mm CL (mean 21.0±3.068 SD). They exhibited a wide range depth distribution from 293.4 to 711.8 m. Nevertheless, more than 50% of males were found between 506–577 m depth. There were no significant differences of male size among depth strata (F= 1.686, p> 0.1405). Female size range recorded was 12.4 –34.7 mm CL (mean 23.2 ± 4.30 SD). Females were collected in a wide depth range 359.0– 711.8 m. ANOVA test revealed that there was a significant difference in the female mean size between depth intervals 400–499 and 600–699 m (F = 2.4989, p <0.0440). The ovigerous female size ranged from 30.6– 34.0 mm CL (mean 27.2 ± 2.74 SD) at a depth between 359.0 to 711.8 m. ANOVA results showed differences among the shallow and deeper strata (F= 6.9175, p <0.00006) (Fig. 10a, b, c). Ovigerous females occurred during spring, summer and autumn and were found in a narrower depth range (800 to 1200 m), compared to the non-ovigerous female’s distribution range that was from 400 to 1200 m depth.