Table 1 Expression patterns of the same-strand intronic microRNAs (miRNAs) and their host genes.

lin-4

Expression seen from late L1 to adult stages; weak expression detected ubiquitously (except germline), stronger in pharynx, vulva, vulval muscle, body wall muscle [36–38].

F59G1.4

Expressed in head neurons: inner labial neurons, amphids and phasmids [50].

mir-2

Expressed from late embryos to adulthood; strong expression detected in many neurons including nerve ring, dorsal nerve cord, ventral nerve cord and also neurons in the tail [36].

ppfr-1

Intestine, ventral nerve cord, body wall muscle, vulval muscle, weak expression in pharynx, some neurons in head and tail [This study].

mir-58

Excretory canal, excretory cell soma, pharynx, intestine, hypodermis, spermatheca, absent in nervous system and in seam cells; expressed at all stages, adults have the highest expression [This study]. Note: no expression detected in [36].

Y67D8A.1

Nervous system [This study].

mir-67

Muscle cells (vulval, body wall and intestinal), not pharyngeal muscles; expressed at all stages, embryos and adults have the highest expression [This study].

zmp-1

Expressed in vulA, vulD and vulE but not vulF cells; the expression in vulD and vulE was present from late L4, whereas the expression in vulA started later in the adult [51, 52].

mir-71

Body wall muscle, hypodermis, spermatheca, somatic gonad, excretory cell, intestine; expressed at all stages of the worm, very low expression in embryos and L2 animals, highest expression in L1s and adults [This study].

ppfr-1

Intestine, ventral nerve cord, body wall muscle, vulval muscle, weak expression in pharynx, some neurons in heads and tail [This study].

mir-82

Two amphid neurons, excretory gland cell, subset of neurons in the tail; expressed at all stages, highest expression in L4s and adults [This study].

Expression detected from L4 to adults in the pharyngeal muscle, developing spermatheca, subset of ventral nerve cord and a subset of amphid neurons [36].

T07D1.2

Early E lineage [53].

mir-86

Ventral nerve cord (some cells), dorsal nerve cord, subset of neurons in the tail, many neurons in the nerve ring; expressed at all stages, highest expression in L2s [This study].

Y56A3A.7

Intestine, pharynx, excretory system, somatic gonad, spermatheca, hypodermis [This study].

mir-87

Ubiquitous expression, strong expression in hypodermis, less expression in seam cells, anterior and posterior bulb of pharynx and nerve cord; expressed at all stages, highest expression in L4s and lowest expression in L2 [This study].

kup-1

Low and ubiquitous expression, also in embryos and germline [This study].

mir-124

Nervous system [This study].

trpa-1

Many tissues, including pharyngeal muscle and body wall muscle, the excretory system, the rectal gland cell, vulval epithelium, epithelial cells in the head, and the spermatheca, the majority of amphid sensory neurons and the phasmid neurons PHA and PHB, sensory neurons OLQ and IL1, other neurons in the head and ventral nerve cord [54].