Protrellus browni, Carreno, 2018

Carreno, Ramon A., 2018, Pinworms (Nematoda: Thelastomatoidea) from Insects Collected in Mississippi, USA, with description of a new species of Protrellus Cobb, 1920 from the Cockroach Ischnoptera deropeltiformis Brunner von Wattenwyl, 1865 (Blattaria: Ectobiidae), Zootaxa 4531 (4), pp. 567-577 : 569

Protrellus browni n. sp.

Description ( Figs. 1–3 )

Female (n = 21). Body robust, elongate, widest in mid-region. Body finely annulated, annules not prominent. Lateral alae absent. Oral annule with 8 looped labiopapillae ( Fig. 1C , 2B ). Amphids circular. Oral opening triradiate. Second annule not expanded, similar in dimensions to additional annules in head region. Esophageal corpus clavate; isthmus short, straight; basal bulb spherical with valvular apparatus ( Fig. 1B ). Nerve ring near mid-region of corpus. Excretory pore immediately anterior to vulvar opening. Vulva opening at start of lower third of corpus ( Figs. 1A,B ; 2A ). Didelphic, opisthodelphic. Vagina and uteri posteriorly directed, ovaries extending to level of anus before reflexing anteriorly. Eggs large, consisting of a broad round end and gradually tapering toward opposite pole which is more pointed. Broader half of egg having a small curved region bearing small spines in first third; spines limited to this region ( Fig. 3A ). One side of egg slightly flattened in lateral view. Eggs lacking gold, green, or yellow coloration. Tail short, conical ( Fig. 1A, D ). Measurements in Table 2.

Male (n=1). Small worms. Lateral alae absent ( Fig. 1E ). Head region slightly expanded. Esophagus with base of corpus slightly expanded, thin isthmus, and elongate bulb. Nerve ring near base of corpus. Testes containing amoeboid spermatozoa. Three pairs of caudal papillae present, including 1 pair subventral precloacal, 1 pair postcloacal adanal, and 1 pair in tail region. Tail subulate. Spicule present. Gubernaculum absent. Measurements inTable 2.

are followed by range for female measurements.

Figures

FIGURE 1. Protrellus browni n. sp. A. Female whole worm. B. Female anterior end. C. Female, en face. D. Female tail, lateral. E. Male whole worm.

FIGURE 2. Protrellus browni n. sp. A. Female anterior end, lateral view showing head and vulva. B. Female, en face.

FIGURE 3. Eggs in situ. A. Protrellus browni, n. sp. B. Protrellus aurifluus Chitwood, 1932.